<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:33e603a7-b32b-43bc-81fd-e55c5e0b41cf,g:4345fdb0-f021-4684-8972-7618f2fea3d8-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.imax.com/role/Cover" xlink:type="simple" xlink:href="imax-20250331.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_4bac4743-8633-4e56-aaab-eeccea414ac9" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_DocumentInformationTable_4bac4743-8633-4e56-aaab-eeccea414ac9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesAddressTypeAxis_97af94b5-f44f-4274-b55d-040a871877c7" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressesAddressTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_4bac4743-8633-4e56-aaab-eeccea414ac9" xlink:to="loc_dei_EntityAddressesAddressTypeAxis_97af94b5-f44f-4274-b55d-040a871877c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_97af94b5-f44f-4274-b55d-040a871877c7_default" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_97af94b5-f44f-4274-b55d-040a871877c7" xlink:to="loc_dei_AddressTypeDomain_97af94b5-f44f-4274-b55d-040a871877c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_76b265cd-3ce6-4d7b-aaff-fd1887975a30" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_97af94b5-f44f-4274-b55d-040a871877c7" xlink:to="loc_dei_AddressTypeDomain_76b265cd-3ce6-4d7b-aaff-fd1887975a30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_OtherAddressMember_d5db6cd1-2f4b-4515-93ea-948438889c7b" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_OtherAddressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_AddressTypeDomain_76b265cd-3ce6-4d7b-aaff-fd1887975a30" xlink:to="loc_dei_OtherAddressMember_d5db6cd1-2f4b-4515-93ea-948438889c7b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_76d24d4d-4f27-4b88-a0cd-e0b5b0d68eb6" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_DocumentType_76d24d4d-4f27-4b88-a0cd-e0b5b0d68eb6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_bc65c6db-13b6-4027-a3d4-1bfc79f24843" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_DocumentQuarterlyReport_bc65c6db-13b6-4027-a3d4-1bfc79f24843" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_86be4743-197d-4941-9ca6-796b88f75db7" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_DocumentPeriodEndDate_86be4743-197d-4941-9ca6-796b88f75db7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_da95302a-5e29-4b45-8ebb-f46fc83a1b23" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_DocumentTransitionReport_da95302a-5e29-4b45-8ebb-f46fc83a1b23" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_27cb771c-f9b5-42d5-93b0-710913dc8be9" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityFileNumber_27cb771c-f9b5-42d5-93b0-710913dc8be9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_2950d69e-70c3-4601-be7c-429a488c94c7" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityRegistrantName_2950d69e-70c3-4601-be7c-429a488c94c7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_038455b2-b5c9-4fee-bf7a-8e0f51287370" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityIncorporationStateCountryCode_038455b2-b5c9-4fee-bf7a-8e0f51287370" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_45922b42-87ac-4857-a60f-6b9b716592ea" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityTaxIdentificationNumber_45922b42-87ac-4857-a60f-6b9b716592ea" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_784b792b-5841-4ebd-afe1-359bd5b5cbd4" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityAddressAddressLine1_784b792b-5841-4ebd-afe1-359bd5b5cbd4" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_0f7a9278-bb31-42c6-a382-eef80679663f" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityAddressAddressLine2_0f7a9278-bb31-42c6-a382-eef80679663f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_3a86faa3-bc96-42fb-a65a-984f22919364" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityAddressCityOrTown_3a86faa3-bc96-42fb-a65a-984f22919364" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_586a4f87-0be0-47fc-9e93-02d300de0750" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityAddressStateOrProvince_586a4f87-0be0-47fc-9e93-02d300de0750" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCountry_3cc38e78-c3cb-4505-b187-cf2ed0134920" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressCountry"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityAddressCountry_3cc38e78-c3cb-4505-b187-cf2ed0134920" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_321ea28b-5d8f-4d7b-a8ef-47648331ec25" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityAddressPostalZipCode_321ea28b-5d8f-4d7b-a8ef-47648331ec25" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_dda7c21c-95e9-4a59-8c75-691b3702a9c2" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_CityAreaCode_dda7c21c-95e9-4a59-8c75-691b3702a9c2" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_7a9324f2-4040-450b-8a94-43a46f65753d" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_LocalPhoneNumber_7a9324f2-4040-450b-8a94-43a46f65753d" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_ceeb2531-53f2-4d1d-a578-381e54ce527c" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_Security12bTitle_ceeb2531-53f2-4d1d-a578-381e54ce527c" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_a1d07920-fb55-4d09-96c0-5dadfe38978f" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_TradingSymbol_a1d07920-fb55-4d09-96c0-5dadfe38978f" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_22f84ece-3613-43ff-9762-5c2006e01cdf" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_SecurityExchangeName_22f84ece-3613-43ff-9762-5c2006e01cdf" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_361b1893-94f2-40c4-aed6-ad59fe571cec" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityCurrentReportingStatus_361b1893-94f2-40c4-aed6-ad59fe571cec" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_49e4f95f-7eb2-4d03-a372-c1a89162ccc7" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityInteractiveDataCurrent_49e4f95f-7eb2-4d03-a372-c1a89162ccc7" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_e7a6dfb8-df80-4c45-930a-4d6cb76db5ea" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityFilerCategory_e7a6dfb8-df80-4c45-930a-4d6cb76db5ea" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_265ebb06-0162-4f7b-9653-83331291ce8b" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntitySmallBusiness_265ebb06-0162-4f7b-9653-83331291ce8b" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_044b1863-4455-4290-bb93-09771470df9a" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityEmergingGrowthCompany_044b1863-4455-4290-bb93-09771470df9a" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_6b2867a7-b07e-4913-8314-8a110c47935b" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityShellCompany_6b2867a7-b07e-4913-8314-8a110c47935b" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_9eb8dbfc-7956-4eeb-9026-fdf029ceadbd" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_9eb8dbfc-7956-4eeb-9026-fdf029ceadbd" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_96b113ff-2692-439a-bfdb-cd94b346a0a2" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_CurrentFiscalYearEndDate_96b113ff-2692-439a-bfdb-cd94b346a0a2" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_0f81b56d-0a79-402d-b7ee-708c7db6466e" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_DocumentFiscalYearFocus_0f81b56d-0a79-402d-b7ee-708c7db6466e" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_d0536dc7-6a49-44d5-8b8d-18e6f3b0b46c" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_DocumentFiscalPeriodFocus_d0536dc7-6a49-44d5-8b8d-18e6f3b0b46c" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_e9c84a4f-7ffc-406f-9840-2e3a93ec2ecc" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_EntityCentralIndexKey_e9c84a4f-7ffc-406f-9840-2e3a93ec2ecc" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_3fff8e66-0e85-4ebf-9f85-6d32d905ccd9" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_57db6e0e-b527-4c9b-a6db-3033caf5240f" xlink:to="loc_dei_AmendmentFlag_3fff8e66-0e85-4ebf-9f85-6d32d905ccd9" xlink:type="arc" order="30"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/CondensedConsolidatedStatementsofOperations" xlink:type="simple" xlink:href="imax-20250331.xsd#CondensedConsolidatedStatementsofOperations"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/CondensedConsolidatedStatementsofOperations" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_ebcd4d4b-1210-439e-aca1-3dbf2c0af170" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_StatementTable_ebcd4d4b-1210-439e-aca1-3dbf2c0af170" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_92f851ee-6752-4cf8-9235-d5543bdf3f53" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_ebcd4d4b-1210-439e-aca1-3dbf2c0af170" xlink:to="loc_srt_ProductOrServiceAxis_92f851ee-6752-4cf8-9235-d5543bdf3f53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_92f851ee-6752-4cf8-9235-d5543bdf3f53_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_92f851ee-6752-4cf8-9235-d5543bdf3f53" xlink:to="loc_srt_ProductsAndServicesDomain_92f851ee-6752-4cf8-9235-d5543bdf3f53_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_c4cbb017-7187-4717-870e-3224863c7ef1" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_92f851ee-6752-4cf8-9235-d5543bdf3f53" xlink:to="loc_srt_ProductsAndServicesDomain_c4cbb017-7187-4717-870e-3224863c7ef1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TechnologySalesMember_955e5766-c129-4595-8f3f-30fdb7484483" xlink:href="imax-20250331.xsd#imax_TechnologySalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c4cbb017-7187-4717-870e-3224863c7ef1" xlink:to="loc_imax_TechnologySalesMember_955e5766-c129-4595-8f3f-30fdb7484483" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServiceMember_4c307b53-3630-472b-89c7-5a2572c998af" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c4cbb017-7187-4717-870e-3224863c7ef1" xlink:to="loc_us-gaap_ServiceMember_4c307b53-3630-472b-89c7-5a2572c998af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TechnologyRentalsMember_8f059a1b-faaf-44d5-a0c4-c1209aad0f8a" xlink:href="imax-20250331.xsd#imax_TechnologyRentalsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c4cbb017-7187-4717-870e-3224863c7ef1" xlink:to="loc_imax_TechnologyRentalsMember_8f059a1b-faaf-44d5-a0c4-c1209aad0f8a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_FinanceIncomeMember_66e077d3-53d6-4bad-87ef-9c678a0ffa89" xlink:href="imax-20250331.xsd#imax_FinanceIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c4cbb017-7187-4717-870e-3224863c7ef1" xlink:to="loc_imax_FinanceIncomeMember_66e077d3-53d6-4bad-87ef-9c678a0ffa89" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_90cf6765-aa41-4ffd-9318-d7ed2ec73749" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_RevenuesAbstract_90cf6765-aa41-4ffd-9318-d7ed2ec73749" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_e72f4be0-9959-45aa-ab0a-3a818b120ba8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_90cf6765-aa41-4ffd-9318-d7ed2ec73749" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_e72f4be0-9959-45aa-ab0a-3a818b120ba8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenueAbstract_7e2e727d-03f0-4573-a169-26eff6987c7e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfRevenueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_CostOfRevenueAbstract_7e2e727d-03f0-4573-a169-26eff6987c7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_89365779-d047-4ea3-a1e8-c59027a6ed4d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_7e2e727d-03f0-4573-a169-26eff6987c7e" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_89365779-d047-4ea3-a1e8-c59027a6ed4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_8cc50eb1-594c-4fa6-b866-f8b6b7e5c9aa" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_GrossProfit_8cc50eb1-594c-4fa6-b866-f8b6b7e5c9aa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_6daa8a71-2a53-4d79-877d-367a05328ed8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_6daa8a71-2a53-4d79-877d-367a05328ed8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_bc9d95ce-0906-49c7-97b1-5db14c5a47ed" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_bc9d95ce-0906-49c7-97b1-5db14c5a47ed" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_2b71131a-ddbe-47a9-9de5-59483a983267" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_2b71131a-ddbe-47a9-9de5-59483a983267" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_AccountsReceivableFinancingReceivableNetInvestmentInLeaseCreditLossExpenseReversalNet_d5f46b9f-592d-42c9-ba0a-ef9202d24c22" xlink:href="imax-20250331.xsd#imax_AccountsReceivableFinancingReceivableNetInvestmentInLeaseCreditLossExpenseReversalNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_imax_AccountsReceivableFinancingReceivableNetInvestmentInLeaseCreditLossExpenseReversalNet_d5f46b9f-592d-42c9-ba0a-ef9202d24c22" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_81d41693-72b8-464c-8cab-96f4d2d0250d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_RestructuringCharges_81d41693-72b8-464c-8cab-96f4d2d0250d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_4adefb83-c705-437b-80d2-7b547de534a0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_OperatingIncomeLoss_4adefb83-c705-437b-80d2-7b547de534a0" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnInvestments_d0420628-e950-4b2d-9101-76a720b69edf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GainLossOnInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_GainLossOnInvestments_d0420628-e950-4b2d-9101-76a720b69edf" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent_42c3f4ba-50b1-4ef5-b4da-836c0cfba686" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent_42c3f4ba-50b1-4ef5-b4da-836c0cfba686" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_e9958b45-c858-40d3-8112-be32ca3066f1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_InvestmentIncomeInterest_e9958b45-c858-40d3-8112-be32ca3066f1" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_bbbe4ad0-3aa9-43a4-82ae-bebd6c3b3d1e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_InterestExpenseNonoperating_bbbe4ad0-3aa9-43a4-82ae-bebd6c3b3d1e" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_aa8b742e-d35f-4b0c-a674-d4ad1ff8e822" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_aa8b742e-d35f-4b0c-a674-d4ad1ff8e822" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_cf7af9ba-234d-4e72-8069-ede274e6a2e8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_cf7af9ba-234d-4e72-8069-ede274e6a2e8" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_b4ed3dae-ae7c-440d-a53c-e5d91cba949b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_ProfitLoss_b4ed3dae-ae7c-440d-a53c-e5d91cba949b" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_0a91ac34-982a-48c3-83f7-76a4d59d7b2b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_0a91ac34-982a-48c3-83f7-76a4d59d7b2b" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_a0575a98-88ec-4e9e-a401-ea9d09acdb5f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_NetIncomeLoss_a0575a98-88ec-4e9e-a401-ea9d09acdb5f" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_b4526ac0-6214-4ae5-93dd-8a26f004bb68" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_EarningsPerShareAbstract_b4526ac0-6214-4ae5-93dd-8a26f004bb68" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_be9c81ec-18c9-4f15-b981-85f23d891453" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_b4526ac0-6214-4ae5-93dd-8a26f004bb68" xlink:to="loc_us-gaap_EarningsPerShareBasic_be9c81ec-18c9-4f15-b981-85f23d891453" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_83d0862e-805b-44b6-9443-f8460355bc37" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_b4526ac0-6214-4ae5-93dd-8a26f004bb68" xlink:to="loc_us-gaap_EarningsPerShareDiluted_83d0862e-805b-44b6-9443-f8460355bc37" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_5f6d6a1c-0529-4f13-a405-59304b43f3f9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a7d4dd36-2507-4c2d-9fa9-5b5130eb97cf" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_5f6d6a1c-0529-4f13-a405-59304b43f3f9" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_2c80ff5b-0f1f-4aaa-922f-0eb1347e1b96" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_5f6d6a1c-0529-4f13-a405-59304b43f3f9" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_2c80ff5b-0f1f-4aaa-922f-0eb1347e1b96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_fbc8a8dd-1d9b-4356-9441-0623f1e1fff6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_5f6d6a1c-0529-4f13-a405-59304b43f3f9" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_fbc8a8dd-1d9b-4356-9441-0623f1e1fff6" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/CondensedConsolidatedStatementsofShareholdersEquity" xlink:type="simple" xlink:href="imax-20250331.xsd#CondensedConsolidatedStatementsofShareholdersEquity"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/CondensedConsolidatedStatementsofShareholdersEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_b785607c-931a-40fc-824c-5237ba775a9b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_31fd9b77-4a31-444e-830f-c81a63b40d6e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_b785607c-931a-40fc-824c-5237ba775a9b" xlink:to="loc_us-gaap_StatementTable_31fd9b77-4a31-444e-830f-c81a63b40d6e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_458e96ce-5b34-4fd9-a13d-54f947ed779b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_31fd9b77-4a31-444e-830f-c81a63b40d6e" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_458e96ce-5b34-4fd9-a13d-54f947ed779b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_458e96ce-5b34-4fd9-a13d-54f947ed779b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_458e96ce-5b34-4fd9-a13d-54f947ed779b" xlink:to="loc_us-gaap_EquityComponentDomain_458e96ce-5b34-4fd9-a13d-54f947ed779b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_dfaf63cf-b9d2-4ab8-94d9-da54a1998668" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_458e96ce-5b34-4fd9-a13d-54f947ed779b" xlink:to="loc_us-gaap_EquityComponentDomain_dfaf63cf-b9d2-4ab8-94d9-da54a1998668" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_5e47138d-e430-4b79-ba0e-8dcb84d56c5b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_dfaf63cf-b9d2-4ab8-94d9-da54a1998668" xlink:to="loc_us-gaap_CommonStockMember_5e47138d-e430-4b79-ba0e-8dcb84d56c5b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_a9c08565-99d7-45d4-bd91-8aa46fd89abf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_dfaf63cf-b9d2-4ab8-94d9-da54a1998668" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_a9c08565-99d7-45d4-bd91-8aa46fd89abf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_StatutorySurplusReserveMember_4eb9023c-305d-4d45-9892-59891df4c701" xlink:href="imax-20250331.xsd#imax_StatutorySurplusReserveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_dfaf63cf-b9d2-4ab8-94d9-da54a1998668" xlink:to="loc_imax_StatutorySurplusReserveMember_4eb9023c-305d-4d45-9892-59891df4c701" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_922ed677-fd8a-4eef-b491-bb6d2f5f23ea" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_dfaf63cf-b9d2-4ab8-94d9-da54a1998668" xlink:to="loc_us-gaap_RetainedEarningsMember_922ed677-fd8a-4eef-b491-bb6d2f5f23ea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_5a95ce67-3b41-4d37-bc80-677e6679bda8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_dfaf63cf-b9d2-4ab8-94d9-da54a1998668" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_5a95ce67-3b41-4d37-bc80-677e6679bda8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_6e8e34a7-8b09-4ee9-9940-a08b50459d25" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_dfaf63cf-b9d2-4ab8-94d9-da54a1998668" xlink:to="loc_us-gaap_NoncontrollingInterestMember_6e8e34a7-8b09-4ee9-9940-a08b50459d25" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b785607c-931a-40fc-824c-5237ba775a9b" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_beb98589-10b1-4339-9550-f28e7a82af28" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_beb98589-10b1-4339-9550-f28e7a82af28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_AdjustmentsToAdditionalPaidInCapitalRestrictedStockUnitsVested_fd059fee-4023-468b-91aa-18852af2c861" xlink:href="imax-20250331.xsd#imax_AdjustmentsToAdditionalPaidInCapitalRestrictedStockUnitsVested"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:to="loc_imax_AdjustmentsToAdditionalPaidInCapitalRestrictedStockUnitsVested_fd059fee-4023-468b-91aa-18852af2c861" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_efa3b9d5-c431-4482-8529-d0e622b51a0e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_efa3b9d5-c431-4482-8529-d0e622b51a0e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_FairValueOfStockOptionsExercised_0e08d524-9b46-4398-8325-af0ede82a6fa" xlink:href="imax-20250331.xsd#imax_FairValueOfStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:to="loc_imax_FairValueOfStockOptionsExercised_0e08d524-9b46-4398-8325-af0ede82a6fa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_a306aa07-1691-40c3-8ad6-1ac541e7b61a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_a306aa07-1691-40c3-8ad6-1ac541e7b61a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition_962f924c-6996-4d5a-ae57-712a7d2ea548" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition_962f924c-6996-4d5a-ae57-712a7d2ea548" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_AdjustmentsToAdditionalPaidInCapitalAmortizationOfShareBasedPaymentExpensePerformanceStockUnits_6e4737be-8ca2-4c2d-a019-28758b0c8007" xlink:href="imax-20250331.xsd#imax_AdjustmentsToAdditionalPaidInCapitalAmortizationOfShareBasedPaymentExpensePerformanceStockUnits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:to="loc_imax_AdjustmentsToAdditionalPaidInCapitalAmortizationOfShareBasedPaymentExpensePerformanceStockUnits_6e4737be-8ca2-4c2d-a019-28758b0c8007" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_f3fdf8fe-83be-472a-b4af-e2684f9caef0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_f3fdf8fe-83be-472a-b4af-e2684f9caef0" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_EstablishmentOfStatutorySurplusReserveRelatesToControllingInterests_e7bb9d5c-04f0-452a-aab8-b71e455974dc" xlink:href="imax-20250331.xsd#imax_EstablishmentOfStatutorySurplusReserveRelatesToControllingInterests"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:to="loc_imax_EstablishmentOfStatutorySurplusReserveRelatesToControllingInterests_e7bb9d5c-04f0-452a-aab8-b71e455974dc" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_42d4cbbf-46a5-41e6-a547-3824c6ae9d2e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:to="loc_us-gaap_NetIncomeLoss_42d4cbbf-46a5-41e6-a547-3824c6ae9d2e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_StatutorySurplusReserveDeductedFromRetainedEarnings_10a0af8c-83a7-402c-bc80-94fab698a4a5" xlink:href="imax-20250331.xsd#imax_StatutorySurplusReserveDeductedFromRetainedEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:to="loc_imax_StatutorySurplusReserveDeductedFromRetainedEarnings_10a0af8c-83a7-402c-bc80-94fab698a4a5" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_4de2716c-9ccb-409e-8e49-ad83f8959007" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_4de2716c-9ccb-409e-8e49-ad83f8959007" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_7d86833c-d5be-4e1d-ab36-417ac5043689" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_7d86833c-d5be-4e1d-ab36-417ac5043689" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest_daa8db65-5bc9-4ab9-b59a-157befe5a0fe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest_daa8db65-5bc9-4ab9-b59a-157befe5a0fe" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_StockIssuedDuringPeriodValueStockOptionsExercisedAttributableToNonControllingInterests_17f3b096-598b-4c01-972c-eff3d1af9be5" xlink:href="imax-20250331.xsd#imax_StockIssuedDuringPeriodValueStockOptionsExercisedAttributableToNonControllingInterests"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d01eace8-c7b7-4d95-9070-4c5f6224cf31" xlink:to="loc_imax_StockIssuedDuringPeriodValueStockOptionsExercisedAttributableToNonControllingInterests_17f3b096-598b-4c01-972c-eff3d1af9be5" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_3b9af306-45d3-4c26-8162-a2653ac7c156" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_8acd939d-2893-43c2-90e8-c67f3ff9777c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/BasisofPresentationVIEsTotalAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#BasisofPresentationVIEsTotalAssetsandLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/BasisofPresentationVIEsTotalAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityLineItems_de2b1caf-0858-49d9-acd3-e2084d9e0c8b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_VariableInterestEntityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_67a22593-12ff-45a6-a964-97c8cca1e23c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_de2b1caf-0858-49d9-acd3-e2084d9e0c8b" xlink:to="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_67a22593-12ff-45a6-a964-97c8cca1e23c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_8f39d044-1141-4f67-8afa-6cee04e5592e" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_67a22593-12ff-45a6-a964-97c8cca1e23c" xlink:to="loc_srt_ConsolidatedEntitiesAxis_8f39d044-1141-4f67-8afa-6cee04e5592e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_8f39d044-1141-4f67-8afa-6cee04e5592e_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_8f39d044-1141-4f67-8afa-6cee04e5592e" xlink:to="loc_srt_ConsolidatedEntitiesDomain_8f39d044-1141-4f67-8afa-6cee04e5592e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_dbe38ea0-738c-43d2-b52d-6fa456918aee" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_8f39d044-1141-4f67-8afa-6cee04e5592e" xlink:to="loc_srt_ConsolidatedEntitiesDomain_dbe38ea0-738c-43d2-b52d-6fa456918aee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_463a4872-f0d3-4ccf-9653-6eeda6ad26cd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_dbe38ea0-738c-43d2-b52d-6fa456918aee" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_463a4872-f0d3-4ccf-9653-6eeda6ad26cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_785e4910-f1a2-40f5-9e97-71aaa5c5e634" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_de2b1caf-0858-49d9-acd3-e2084d9e0c8b" xlink:to="loc_us-gaap_Assets_785e4910-f1a2-40f5-9e97-71aaa5c5e634" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_488106f8-865c-41a8-a5fd-4fa438726901" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_de2b1caf-0858-49d9-acd3-e2084d9e0c8b" xlink:to="loc_us-gaap_Liabilities_488106f8-865c-41a8-a5fd-4fa438726901" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/ReceivablesSummaryofAllowanceForCreditLossesRelatedtoAccountsReceivableDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#ReceivablesSummaryofAllowanceForCreditLossesRelatedtoAccountsReceivableDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/ReceivablesSummaryofAllowanceForCreditLossesRelatedtoAccountsReceivableDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_imax_AccountsReceivableAllowanceForCreditLossLineItems_70ea4b9b-eae8-40b3-96c7-fa792104bf4d" xlink:href="imax-20250331.xsd#imax_AccountsReceivableAllowanceForCreditLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_AccountsReceivableAllowanceForCreditLossTable_0f03a06b-3cf2-4b65-9ca3-8a8b3499b411" xlink:href="imax-20250331.xsd#imax_AccountsReceivableAllowanceForCreditLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_imax_AccountsReceivableAllowanceForCreditLossLineItems_70ea4b9b-eae8-40b3-96c7-fa792104bf4d" xlink:to="loc_imax_AccountsReceivableAllowanceForCreditLossTable_0f03a06b-3cf2-4b65-9ca3-8a8b3499b411" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_8b56c97e-0d01-45ff-bedb-31cd20c2d695" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_imax_AccountsReceivableAllowanceForCreditLossTable_0f03a06b-3cf2-4b65-9ca3-8a8b3499b411" xlink:to="loc_srt_ProductOrServiceAxis_8b56c97e-0d01-45ff-bedb-31cd20c2d695" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_8b56c97e-0d01-45ff-bedb-31cd20c2d695_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_8b56c97e-0d01-45ff-bedb-31cd20c2d695" xlink:to="loc_srt_ProductsAndServicesDomain_8b56c97e-0d01-45ff-bedb-31cd20c2d695_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_4b5ff76c-915a-4ddb-8612-81dbb6f7c44a" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_8b56c97e-0d01-45ff-bedb-31cd20c2d695" xlink:to="loc_srt_ProductsAndServicesDomain_4b5ff76c-915a-4ddb-8612-81dbb6f7c44a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TheaterOperatorsMember_a1527192-8740-47e7-8f14-b985e45c55f9" xlink:href="imax-20250331.xsd#imax_TheaterOperatorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4b5ff76c-915a-4ddb-8612-81dbb6f7c44a" xlink:to="loc_imax_TheaterOperatorsMember_a1527192-8740-47e7-8f14-b985e45c55f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_StudiosMember_02bbf337-5f36-47de-a8c4-6b43cef18e36" xlink:href="imax-20250331.xsd#imax_StudiosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4b5ff76c-915a-4ddb-8612-81dbb6f7c44a" xlink:to="loc_imax_StudiosMember_02bbf337-5f36-47de-a8c4-6b43cef18e36" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_OtherMember_93001d8f-14ea-4594-995a-ec5a91dcbbaf" xlink:href="imax-20250331.xsd#imax_OtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4b5ff76c-915a-4ddb-8612-81dbb6f7c44a" xlink:to="loc_imax_OtherMember_93001d8f-14ea-4594-995a-ec5a91dcbbaf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_b0e6a22a-be2f-452a-9c51-409f9b845cef" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_AccountsReceivableAllowanceForCreditLossLineItems_70ea4b9b-eae8-40b3-96c7-fa792104bf4d" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_b0e6a22a-be2f-452a-9c51-409f9b845cef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_38b20a19-6945-4a6f-ac94-add1c0b4cc0e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_b0e6a22a-be2f-452a-9c51-409f9b845cef" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_38b20a19-6945-4a6f-ac94-add1c0b4cc0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_d07b039c-dfdc-447a-ba2b-4c68b48c6d07" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_b0e6a22a-be2f-452a-9c51-409f9b845cef" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_d07b039c-dfdc-447a-ba2b-4c68b48c6d07" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_AccountsReceivableAllowanceForCreditLossWriteoffAfterRecovery_f36c7bae-c70e-4af1-a753-bc622b7fd8ea" xlink:href="imax-20250331.xsd#imax_AccountsReceivableAllowanceForCreditLossWriteoffAfterRecovery"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_b0e6a22a-be2f-452a-9c51-409f9b845cef" xlink:to="loc_imax_AccountsReceivableAllowanceForCreditLossWriteoffAfterRecovery_f36c7bae-c70e-4af1-a753-bc622b7fd8ea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_AllowanceForDoubtfulAccountsForeignExchange_8cc0999d-99dc-4a3f-aab2-142d270f0d43" xlink:href="imax-20250331.xsd#imax_AllowanceForDoubtfulAccountsForeignExchange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_b0e6a22a-be2f-452a-9c51-409f9b845cef" xlink:to="loc_imax_AllowanceForDoubtfulAccountsForeignExchange_8cc0999d-99dc-4a3f-aab2-142d270f0d43" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_e663f119-1d28-4977-8ed3-3f0fc232643e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/ReceivablesAdditionalInformationDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#ReceivablesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/ReceivablesAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_imax_CurrentExpectedCreditLossesLineItems_9a5000b6-e79e-4654-9171-db05897a2a42" xlink:href="imax-20250331.xsd#imax_CurrentExpectedCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_CurrentExpectedCreditLossesTable_42be47ff-4848-427d-b3d1-73e138f0b051" xlink:href="imax-20250331.xsd#imax_CurrentExpectedCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_imax_CurrentExpectedCreditLossesLineItems_9a5000b6-e79e-4654-9171-db05897a2a42" xlink:to="loc_imax_CurrentExpectedCreditLossesTable_42be47ff-4848-427d-b3d1-73e138f0b051" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_be11af79-e220-4e36-8ce1-2718cf4ca741" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_imax_CurrentExpectedCreditLossesTable_42be47ff-4848-427d-b3d1-73e138f0b051" xlink:to="loc_srt_ProductOrServiceAxis_be11af79-e220-4e36-8ce1-2718cf4ca741" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_be11af79-e220-4e36-8ce1-2718cf4ca741_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_be11af79-e220-4e36-8ce1-2718cf4ca741" xlink:to="loc_srt_ProductsAndServicesDomain_be11af79-e220-4e36-8ce1-2718cf4ca741_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_48cdd7dc-c5f0-4153-a248-92149cb26924" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_be11af79-e220-4e36-8ce1-2718cf4ca741" xlink:to="loc_srt_ProductsAndServicesDomain_48cdd7dc-c5f0-4153-a248-92149cb26924" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TheatreAndForeignMovieStudioMember_287ca5ac-9c66-4b42-9d79-1f01bf62c849" xlink:href="imax-20250331.xsd#imax_TheatreAndForeignMovieStudioMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_48cdd7dc-c5f0-4153-a248-92149cb26924" xlink:to="loc_imax_TheatreAndForeignMovieStudioMember_287ca5ac-9c66-4b42-9d79-1f01bf62c849" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TheaterOperatorsMember_f6c97b46-e837-46d0-87dc-0f3f3b06638d" xlink:href="imax-20250331.xsd#imax_TheaterOperatorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_48cdd7dc-c5f0-4153-a248-92149cb26924" xlink:to="loc_imax_TheaterOperatorsMember_f6c97b46-e837-46d0-87dc-0f3f3b06638d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_90508464-0d1f-4956-a525-d7246febc7fb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_imax_CurrentExpectedCreditLossesTable_42be47ff-4848-427d-b3d1-73e138f0b051" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_90508464-0d1f-4956-a525-d7246febc7fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_90508464-0d1f-4956-a525-d7246febc7fb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_90508464-0d1f-4956-a525-d7246febc7fb" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_90508464-0d1f-4956-a525-d7246febc7fb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_011e92dd-4bf0-4a25-a225-d0b96cb2fc8c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_90508464-0d1f-4956-a525-d7246febc7fb" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_011e92dd-4bf0-4a25-a225-d0b96cb2fc8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeasesPortfolioSegmentMember_4e140658-6529-433a-9eb3-ea7bc3fa4398" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeasesPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_011e92dd-4bf0-4a25-a225-d0b96cb2fc8c" xlink:to="loc_us-gaap_FinanceLeasesPortfolioSegmentMember_4e140658-6529-433a-9eb3-ea7bc3fa4398" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_NetFinancedSalesReceivablesMember_5dd43941-2017-4816-a627-631ae1f6f76b" xlink:href="imax-20250331.xsd#imax_NetFinancedSalesReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_011e92dd-4bf0-4a25-a225-d0b96cb2fc8c" xlink:to="loc_imax_NetFinancedSalesReceivablesMember_5dd43941-2017-4816-a627-631ae1f6f76b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_IncreaseDecreaseInAllowanceForDoubtfulAccountsReceivableCurrentProvision_40608d02-3e2d-4d75-91dc-0e07cbdd7d67" xlink:href="imax-20250331.xsd#imax_IncreaseDecreaseInAllowanceForDoubtfulAccountsReceivableCurrentProvision"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_CurrentExpectedCreditLossesLineItems_9a5000b6-e79e-4654-9171-db05897a2a42" xlink:to="loc_imax_IncreaseDecreaseInAllowanceForDoubtfulAccountsReceivableCurrentProvision_40608d02-3e2d-4d75-91dc-0e07cbdd7d67" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_c960e202-8539-4572-8e9f-1bce7d4d64a7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_CurrentExpectedCreditLossesLineItems_9a5000b6-e79e-4654-9171-db05897a2a42" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_c960e202-8539-4572-8e9f-1bce7d4d64a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_NetInvestmentInLeaseNonaccrualStatusFinanceIncome_237fa3b8-861a-4291-a461-a21d4f1a31d9" xlink:href="imax-20250331.xsd#imax_NetInvestmentInLeaseNonaccrualStatusFinanceIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_CurrentExpectedCreditLossesLineItems_9a5000b6-e79e-4654-9171-db05897a2a42" xlink:to="loc_imax_NetInvestmentInLeaseNonaccrualStatusFinanceIncome_237fa3b8-861a-4291-a461-a21d4f1a31d9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_FinancedSalesReceivablesNonaccrualStatusFinanceIncome_a93f8607-8ad8-439b-bcf8-95323692d049" xlink:href="imax-20250331.xsd#imax_FinancedSalesReceivablesNonaccrualStatusFinanceIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_CurrentExpectedCreditLossesLineItems_9a5000b6-e79e-4654-9171-db05897a2a42" xlink:to="loc_imax_FinancedSalesReceivablesNonaccrualStatusFinanceIncome_a93f8607-8ad8-439b-bcf8-95323692d049" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease_0640d27a-83dc-4682-989e-84ba148e5ccd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_CurrentExpectedCreditLossesLineItems_9a5000b6-e79e-4654-9171-db05897a2a42" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease_0640d27a-83dc-4682-989e-84ba148e5ccd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_AllowanceForDoubtfulVariableConsiderationReceivableNetOfForeignExchangeCurrentProvision_4c001abf-6ad0-468f-be43-030fbc7dc43b" xlink:href="imax-20250331.xsd#imax_AllowanceForDoubtfulVariableConsiderationReceivableNetOfForeignExchangeCurrentProvision"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_CurrentExpectedCreditLossesLineItems_9a5000b6-e79e-4654-9171-db05897a2a42" xlink:to="loc_imax_AllowanceForDoubtfulVariableConsiderationReceivableNetOfForeignExchangeCurrentProvision_4c001abf-6ad0-468f-be43-030fbc7dc43b" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/ReceivablesScheduleofNetInvestmentinLeasesbyCreditQualityIndicatorDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#ReceivablesScheduleofNetInvestmentinLeasesbyCreditQualityIndicatorDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/ReceivablesScheduleofNetInvestmentinLeasesbyCreditQualityIndicatorDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseCreditQualityIndicatorLineItems_c508b9a1-d828-4119-bf9a-6d0f52d7b793" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLeaseCreditQualityIndicatorLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseCreditQualityIndicatorTable_aa95bb8b-7895-4a1f-855b-f330519799d2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLeaseCreditQualityIndicatorTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseCreditQualityIndicatorLineItems_c508b9a1-d828-4119-bf9a-6d0f52d7b793" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseCreditQualityIndicatorTable_aa95bb8b-7895-4a1f-855b-f330519799d2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentAxis_9ae59a6a-9e27-4468-9099-d088ee07e62a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InternalCreditAssessmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseCreditQualityIndicatorTable_aa95bb8b-7895-4a1f-855b-f330519799d2" xlink:to="loc_us-gaap_InternalCreditAssessmentAxis_9ae59a6a-9e27-4468-9099-d088ee07e62a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_9ae59a6a-9e27-4468-9099-d088ee07e62a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_9ae59a6a-9e27-4468-9099-d088ee07e62a" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_9ae59a6a-9e27-4468-9099-d088ee07e62a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_28873251-176e-4106-b4e9-570baeeb9369" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_9ae59a6a-9e27-4468-9099-d088ee07e62a" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_28873251-176e-4106-b4e9-570baeeb9369" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_InGoodStandingMember_6b21d7af-109b-4675-8df6-b214858908db" xlink:href="imax-20250331.xsd#imax_InGoodStandingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_28873251-176e-4106-b4e9-570baeeb9369" xlink:to="loc_imax_InGoodStandingMember_6b21d7af-109b-4675-8df6-b214858908db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_CreditWatchMemberMember_efb73e8b-21e3-4465-89d6-1c2cc55c199d" xlink:href="imax-20250331.xsd#imax_CreditWatchMemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_28873251-176e-4106-b4e9-570baeeb9369" xlink:to="loc_imax_CreditWatchMemberMember_efb73e8b-21e3-4465-89d6-1c2cc55c199d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_PreApprovedTransactionsMember_51d60bc1-f395-4190-89b6-da104f8b748c" xlink:href="imax-20250331.xsd#imax_PreApprovedTransactionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_28873251-176e-4106-b4e9-570baeeb9369" xlink:to="loc_imax_PreApprovedTransactionsMember_51d60bc1-f395-4190-89b6-da104f8b748c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TransactionsSuspendedMember_7ea141f2-d099-46b7-b057-594ed1b1ab94" xlink:href="imax-20250331.xsd#imax_TransactionsSuspendedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_28873251-176e-4106-b4e9-570baeeb9369" xlink:to="loc_imax_TransactionsSuspendedMember_7ea141f2-d099-46b7-b057-594ed1b1ab94" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeasesNetInvestmentInLeasesAbstract_4bbe5f9e-5213-4876-8493-04bbf112c682" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeasesNetInvestmentInLeasesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseCreditQualityIndicatorLineItems_c508b9a1-d828-4119-bf9a-6d0f52d7b793" xlink:to="loc_us-gaap_SalesTypeLeasesNetInvestmentInLeasesAbstract_4bbe5f9e-5213-4876-8493-04bbf112c682" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedInCurrentFiscalYear_abee9dd8-5010-41f2-9b06-7950cbe6ffef" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedInCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseCreditQualityIndicatorLineItems_c508b9a1-d828-4119-bf9a-6d0f52d7b793" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedInCurrentFiscalYear_abee9dd8-5010-41f2-9b06-7950cbe6ffef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedInFiscalYearBeforeLatestFiscalYear_cd139a98-04ac-498b-b9b3-673e8f7cb222" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedInFiscalYearBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseCreditQualityIndicatorLineItems_c508b9a1-d828-4119-bf9a-6d0f52d7b793" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedInFiscalYearBeforeLatestFiscalYear_cd139a98-04ac-498b-b9b3-673e8f7cb222" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedTwoYearsBeforeLatestFiscalYear_8c3564b3-97e9-4948-bffd-8284111c0ac2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedTwoYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseCreditQualityIndicatorLineItems_c508b9a1-d828-4119-bf9a-6d0f52d7b793" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedTwoYearsBeforeLatestFiscalYear_8c3564b3-97e9-4948-bffd-8284111c0ac2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedThreeYearsBeforeLatestFiscalYear_160ba8b8-e3c4-4964-b005-ff93b779f8ae" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedThreeYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseCreditQualityIndicatorLineItems_c508b9a1-d828-4119-bf9a-6d0f52d7b793" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedThreeYearsBeforeLatestFiscalYear_160ba8b8-e3c4-4964-b005-ff93b779f8ae" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedFourYearsBeforeLatestFiscalYear_178267bc-f7dd-49fa-aff6-82b6a892df54" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedFourYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseCreditQualityIndicatorLineItems_c508b9a1-d828-4119-bf9a-6d0f52d7b793" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedFourYearsBeforeLatestFiscalYear_178267bc-f7dd-49fa-aff6-82b6a892df54" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedFiveOrMoreYearsBeforeLatestFiscalYear_3af0267b-1853-4212-bfd8-598d3bb8b5ed" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedFiveOrMoreYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseCreditQualityIndicatorLineItems_c508b9a1-d828-4119-bf9a-6d0f52d7b793" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseOriginatedFiveOrMoreYearsBeforeLatestFiscalYear_3af0267b-1853-4212-bfd8-598d3bb8b5ed" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLease_b9b2034d-eb0c-466e-b234-0ad9c4d1fc58" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseCreditQualityIndicatorLineItems_c508b9a1-d828-4119-bf9a-6d0f52d7b793" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLease_b9b2034d-eb0c-466e-b234-0ad9c4d1fc58" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/ReceivablesScheduleofFinancedSaleReceivablesbyCreditQualityIndicatorDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#ReceivablesScheduleofFinancedSaleReceivablesbyCreditQualityIndicatorDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/ReceivablesScheduleofFinancedSaleReceivablesbyCreditQualityIndicatorDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_8218a595-f586-4b64-889b-7694b78c173d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_652b3948-3d5e-4398-b0f6-1cc1851a2f8f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_8218a595-f586-4b64-889b-7694b78c173d" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_652b3948-3d5e-4398-b0f6-1cc1851a2f8f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentAxis_60affd34-67de-4958-aaba-b94bf961f3a5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InternalCreditAssessmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_652b3948-3d5e-4398-b0f6-1cc1851a2f8f" xlink:to="loc_us-gaap_InternalCreditAssessmentAxis_60affd34-67de-4958-aaba-b94bf961f3a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_60affd34-67de-4958-aaba-b94bf961f3a5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_60affd34-67de-4958-aaba-b94bf961f3a5" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_60affd34-67de-4958-aaba-b94bf961f3a5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_7b8a6b16-afca-47c4-ba89-fe3575c5a981" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_60affd34-67de-4958-aaba-b94bf961f3a5" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_7b8a6b16-afca-47c4-ba89-fe3575c5a981" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_InGoodStandingMember_460a61c5-58c0-4d4a-ae13-57e075bd876f" xlink:href="imax-20250331.xsd#imax_InGoodStandingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_7b8a6b16-afca-47c4-ba89-fe3575c5a981" xlink:to="loc_imax_InGoodStandingMember_460a61c5-58c0-4d4a-ae13-57e075bd876f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_CreditWatchMemberMember_9de64a6f-12f0-4ac1-a00d-467ded5e2414" xlink:href="imax-20250331.xsd#imax_CreditWatchMemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_7b8a6b16-afca-47c4-ba89-fe3575c5a981" xlink:to="loc_imax_CreditWatchMemberMember_9de64a6f-12f0-4ac1-a00d-467ded5e2414" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_PreApprovedTransactionsMember_031b890f-a980-49ee-b569-d403f48cfdb2" xlink:href="imax-20250331.xsd#imax_PreApprovedTransactionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_7b8a6b16-afca-47c4-ba89-fe3575c5a981" xlink:to="loc_imax_PreApprovedTransactionsMember_031b890f-a980-49ee-b569-d403f48cfdb2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TransactionsSuspendedMember_3e6abffc-262f-40aa-84d9-783a1211864c" xlink:href="imax-20250331.xsd#imax_TransactionsSuspendedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_7b8a6b16-afca-47c4-ba89-fe3575c5a981" xlink:to="loc_imax_TransactionsSuspendedMember_3e6abffc-262f-40aa-84d9-783a1211864c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableBeforeAllowanceForCreditLossByOriginationYearAbstract_2bc07b72-35da-42a5-816b-43b74a7bc8da" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableBeforeAllowanceForCreditLossByOriginationYearAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_8218a595-f586-4b64-889b-7694b78c173d" xlink:to="loc_us-gaap_FinancingReceivableBeforeAllowanceForCreditLossByOriginationYearAbstract_2bc07b72-35da-42a5-816b-43b74a7bc8da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear_ea4f6616-0cfe-4a6f-aca5-e456ed5efdfc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableBeforeAllowanceForCreditLossByOriginationYearAbstract_2bc07b72-35da-42a5-816b-43b74a7bc8da" xlink:to="loc_us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear_ea4f6616-0cfe-4a6f-aca5-e456ed5efdfc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear_1ca778ab-d9be-4988-920e-c34c0c67e09b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableBeforeAllowanceForCreditLossByOriginationYearAbstract_2bc07b72-35da-42a5-816b-43b74a7bc8da" xlink:to="loc_us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear_1ca778ab-d9be-4988-920e-c34c0c67e09b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear_2cad5bd5-18bf-4a77-ad10-6f251bb5829c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableBeforeAllowanceForCreditLossByOriginationYearAbstract_2bc07b72-35da-42a5-816b-43b74a7bc8da" xlink:to="loc_us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear_2cad5bd5-18bf-4a77-ad10-6f251bb5829c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear_220eeb24-30f4-40b3-a7a0-45a9a3036ed1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableBeforeAllowanceForCreditLossByOriginationYearAbstract_2bc07b72-35da-42a5-816b-43b74a7bc8da" xlink:to="loc_us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear_220eeb24-30f4-40b3-a7a0-45a9a3036ed1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear_af6266df-450b-4c7b-bd9a-d6c5fe9662af" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableBeforeAllowanceForCreditLossByOriginationYearAbstract_2bc07b72-35da-42a5-816b-43b74a7bc8da" xlink:to="loc_us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear_af6266df-450b-4c7b-bd9a-d6c5fe9662af" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear_fde7e91f-b438-4a8b-89e0-b663ae49bca0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableBeforeAllowanceForCreditLossByOriginationYearAbstract_2bc07b72-35da-42a5-816b-43b74a7bc8da" xlink:to="loc_us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear_fde7e91f-b438-4a8b-89e0-b663ae49bca0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableGross_6ad4bca2-6971-4c6c-9ce9-ae21afae3562" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NotesReceivableGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableBeforeAllowanceForCreditLossByOriginationYearAbstract_2bc07b72-35da-42a5-816b-43b74a7bc8da" xlink:to="loc_us-gaap_NotesReceivableGross_6ad4bca2-6971-4c6c-9ce9-ae21afae3562" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/ReceivablesScheduleofAgingAnalysisforNetInvestmentinLeasesandFinancedSaleReceivablesDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#ReceivablesScheduleofAgingAnalysisforNetInvestmentinLeasesandFinancedSaleReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/ReceivablesScheduleofAgingAnalysisforNetInvestmentinLeasesandFinancedSaleReceivablesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_6728f04b-ae4e-4dd5-a6ef-fd6c29c9bd00" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_d6cae158-c8c3-479c-b952-e8a25bdcb002" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfFinancingReceivablesPastDueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_6728f04b-ae4e-4dd5-a6ef-fd6c29c9bd00" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_d6cae158-c8c3-479c-b952-e8a25bdcb002" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_fc65624a-2ab7-49d0-8289-5bf1f30afe61" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_d6cae158-c8c3-479c-b952-e8a25bdcb002" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_fc65624a-2ab7-49d0-8289-5bf1f30afe61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_fc65624a-2ab7-49d0-8289-5bf1f30afe61_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_fc65624a-2ab7-49d0-8289-5bf1f30afe61" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_fc65624a-2ab7-49d0-8289-5bf1f30afe61_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_8b5a4f4a-2b20-42a0-b821-61fae9903846" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_fc65624a-2ab7-49d0-8289-5bf1f30afe61" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_8b5a4f4a-2b20-42a0-b821-61fae9903846" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialAssetNotPastDueMember_7d16d80c-d493-4fe9-b65c-2ac4711546d2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialAssetNotPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_8b5a4f4a-2b20-42a0-b821-61fae9903846" xlink:to="loc_us-gaap_FinancialAssetNotPastDueMember_7d16d80c-d493-4fe9-b65c-2ac4711546d2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_FinancialAsset30To89DaysPastDueMember_0eb99de7-a38a-4982-8d27-e489c097d18f" xlink:href="imax-20250331.xsd#imax_FinancialAsset30To89DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_8b5a4f4a-2b20-42a0-b821-61fae9903846" xlink:to="loc_imax_FinancialAsset30To89DaysPastDueMember_0eb99de7-a38a-4982-8d27-e489c097d18f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_53cdc775-7749-431f-926b-b00595bbcd2a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_8b5a4f4a-2b20-42a0-b821-61fae9903846" xlink:to="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_53cdc775-7749-431f-926b-b00595bbcd2a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_c3ad082c-bedd-4443-9100-6d3d42fbb455" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_d6cae158-c8c3-479c-b952-e8a25bdcb002" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_c3ad082c-bedd-4443-9100-6d3d42fbb455" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_c3ad082c-bedd-4443-9100-6d3d42fbb455_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_c3ad082c-bedd-4443-9100-6d3d42fbb455" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_c3ad082c-bedd-4443-9100-6d3d42fbb455_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_f21b15f8-7dd9-49e8-a920-189a6bdb5b44" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_c3ad082c-bedd-4443-9100-6d3d42fbb455" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_f21b15f8-7dd9-49e8-a920-189a6bdb5b44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_NetInvestmentInLeasesAndFinancedSalesReceivablesExcludingAccruedFinanceIncomeMember_5bc75270-b3f9-4f57-bbc1-c7b6a364bf49" xlink:href="imax-20250331.xsd#imax_NetInvestmentInLeasesAndFinancedSalesReceivablesExcludingAccruedFinanceIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_f21b15f8-7dd9-49e8-a920-189a6bdb5b44" xlink:to="loc_imax_NetInvestmentInLeasesAndFinancedSalesReceivablesExcludingAccruedFinanceIncomeMember_5bc75270-b3f9-4f57-bbc1-c7b6a364bf49" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_NetInvestmentInLeasesExcludingAccruedFinanceIncomeMember_4e25e1b0-2d1f-4f59-8b4a-0440736b9d75" xlink:href="imax-20250331.xsd#imax_NetInvestmentInLeasesExcludingAccruedFinanceIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_NetInvestmentInLeasesAndFinancedSalesReceivablesExcludingAccruedFinanceIncomeMember_5bc75270-b3f9-4f57-bbc1-c7b6a364bf49" xlink:to="loc_imax_NetInvestmentInLeasesExcludingAccruedFinanceIncomeMember_4e25e1b0-2d1f-4f59-8b4a-0440736b9d75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_FinancedSalesReceivablesExcludingAccruedFinanceIncomeMember_bd407e7e-aaa1-430d-b800-05fe47322b4c" xlink:href="imax-20250331.xsd#imax_FinancedSalesReceivablesExcludingAccruedFinanceIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_NetInvestmentInLeasesAndFinancedSalesReceivablesExcludingAccruedFinanceIncomeMember_5bc75270-b3f9-4f57-bbc1-c7b6a364bf49" xlink:to="loc_imax_FinancedSalesReceivablesExcludingAccruedFinanceIncomeMember_bd407e7e-aaa1-430d-b800-05fe47322b4c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_7b5f40ca-ab7e-42b0-a008-ad2826d79984" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_d6cae158-c8c3-479c-b952-e8a25bdcb002" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_7b5f40ca-ab7e-42b0-a008-ad2826d79984" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesBillingStatusDomain_7b5f40ca-ab7e-42b0-a008-ad2826d79984_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReceivablesBillingStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_7b5f40ca-ab7e-42b0-a008-ad2826d79984" xlink:to="loc_us-gaap_ReceivablesBillingStatusDomain_7b5f40ca-ab7e-42b0-a008-ad2826d79984_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesBillingStatusDomain_bade6e34-7ca3-431c-98a3-36a38171b97a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReceivablesBillingStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_7b5f40ca-ab7e-42b0-a008-ad2826d79984" xlink:to="loc_us-gaap_ReceivablesBillingStatusDomain_bade6e34-7ca3-431c-98a3-36a38171b97a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BilledRevenuesMember_6d1ac304-de1b-4ff4-b17e-3d7ff024e166" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BilledRevenuesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivablesBillingStatusDomain_bade6e34-7ca3-431c-98a3-36a38171b97a" xlink:to="loc_us-gaap_BilledRevenuesMember_6d1ac304-de1b-4ff4-b17e-3d7ff024e166" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnbilledRevenuesMember_8f26add7-21e4-4e8e-823a-b84f49def969" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_UnbilledRevenuesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivablesBillingStatusDomain_bade6e34-7ca3-431c-98a3-36a38171b97a" xlink:to="loc_us-gaap_UnbilledRevenuesMember_8f26add7-21e4-4e8e-823a-b84f49def969" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLossAbstract_7fc5f5a9-aca6-464c-88f2-dff9e73f7127" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLossAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_6728f04b-ae4e-4dd5-a6ef-fd6c29c9bd00" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLossAbstract_7fc5f5a9-aca6-464c-88f2-dff9e73f7127" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLease_cacfa939-e01c-47a7-b774-ba9e93ef3c74" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLossAbstract_7fc5f5a9-aca6-464c-88f2-dff9e73f7127" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLease_cacfa939-e01c-47a7-b774-ba9e93ef3c74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAllowanceForCreditLoss_fb6332c3-bd1e-48ed-bda1-5b264aadd68f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLeaseAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLossAbstract_7fc5f5a9-aca6-464c-88f2-dff9e73f7127" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAllowanceForCreditLoss_fb6332c3-bd1e-48ed-bda1-5b264aadd68f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLoss_dc0191c2-6c6d-44bd-a022-e292f0b7d037" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLossAbstract_7fc5f5a9-aca6-464c-88f2-dff9e73f7127" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLoss_dc0191c2-6c6d-44bd-a022-e292f0b7d037" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableNetAbstract_082758c6-430e-4f60-8088-b5d0251b6fde" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NotesReceivableNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_6728f04b-ae4e-4dd5-a6ef-fd6c29c9bd00" xlink:to="loc_us-gaap_NotesReceivableNetAbstract_082758c6-430e-4f60-8088-b5d0251b6fde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableGross_8ded9f80-3c03-4092-9466-734c25f6c746" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NotesReceivableGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NotesReceivableNetAbstract_082758c6-430e-4f60-8088-b5d0251b6fde" xlink:to="loc_us-gaap_NotesReceivableGross_8ded9f80-3c03-4092-9466-734c25f6c746" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_de0aca7c-fdca-4bae-a650-11c81af27126" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NotesReceivableNetAbstract_082758c6-430e-4f60-8088-b5d0251b6fde" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_de0aca7c-fdca-4bae-a650-11c81af27126" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableNet_b80a7702-80fa-4855-9139-b1fa39f62acf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NotesReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NotesReceivableNetAbstract_082758c6-430e-4f60-8088-b5d0251b6fde" xlink:to="loc_us-gaap_NotesReceivableNet_b80a7702-80fa-4855-9139-b1fa39f62acf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLossAbstract_bbbf9678-daf7-48ca-9660-430ac168ff0d" xlink:href="imax-20250331.xsd#imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLossAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_6728f04b-ae4e-4dd5-a6ef-fd6c29c9bd00" xlink:to="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLossAbstract_bbbf9678-daf7-48ca-9660-430ac168ff0d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableBeforeAllowanceForCreditLoss_b8703413-2d00-4eb6-9e0b-724c252ad8bd" xlink:href="imax-20250331.xsd#imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLossAbstract_bbbf9678-daf7-48ca-9660-430ac168ff0d" xlink:to="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableBeforeAllowanceForCreditLoss_b8703413-2d00-4eb6-9e0b-724c252ad8bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAllowanceForCreditLoss_812a8181-bcb9-491e-a003-719ce6228c41" xlink:href="imax-20250331.xsd#imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLossAbstract_bbbf9678-daf7-48ca-9660-430ac168ff0d" xlink:to="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAllowanceForCreditLoss_812a8181-bcb9-491e-a003-719ce6228c41" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLoss_a4e02a6c-9698-4420-9edb-dcb2a8156894" xlink:href="imax-20250331.xsd#imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLossAbstract_bbbf9678-daf7-48ca-9660-430ac168ff0d" xlink:to="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLoss_a4e02a6c-9698-4420-9edb-dcb2a8156894" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/ReceivablesScheduleofNetInvestmentinLeasesandFinancedSaleReceivableswithBilledAmountsPastDueContinuestoAccrueFinanceIncomeDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#ReceivablesScheduleofNetInvestmentinLeasesandFinancedSaleReceivableswithBilledAmountsPastDueContinuestoAccrueFinanceIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/ReceivablesScheduleofNetInvestmentinLeasesandFinancedSaleReceivableswithBilledAmountsPastDueContinuestoAccrueFinanceIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_2937cbf0-311b-47ac-af18-eda58b934efb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_7e46fc32-894e-461a-b3a7-3d9661156e0d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfFinancingReceivablesPastDueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_2937cbf0-311b-47ac-af18-eda58b934efb" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_7e46fc32-894e-461a-b3a7-3d9661156e0d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_47c2930d-37f0-4c0a-814b-34c61eaeb5b9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_7e46fc32-894e-461a-b3a7-3d9661156e0d" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_47c2930d-37f0-4c0a-814b-34c61eaeb5b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_47c2930d-37f0-4c0a-814b-34c61eaeb5b9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_47c2930d-37f0-4c0a-814b-34c61eaeb5b9" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_47c2930d-37f0-4c0a-814b-34c61eaeb5b9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_017dee83-643e-4be2-a39b-0c6c5bb5fe3f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_47c2930d-37f0-4c0a-814b-34c61eaeb5b9" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_017dee83-643e-4be2-a39b-0c6c5bb5fe3f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialAssetNotPastDueMember_1a1bafa8-5fe5-4ed5-ba6f-4f15e3196554" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialAssetNotPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_017dee83-643e-4be2-a39b-0c6c5bb5fe3f" xlink:to="loc_us-gaap_FinancialAssetNotPastDueMember_1a1bafa8-5fe5-4ed5-ba6f-4f15e3196554" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_FinancialAsset30To89DaysPastDueMember_4747a7a8-6d6d-480d-89a4-0b591da4c21e" xlink:href="imax-20250331.xsd#imax_FinancialAsset30To89DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_017dee83-643e-4be2-a39b-0c6c5bb5fe3f" xlink:to="loc_imax_FinancialAsset30To89DaysPastDueMember_4747a7a8-6d6d-480d-89a4-0b591da4c21e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_2858a22b-7e28-4101-aeec-3a4c0cd6bc88" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_017dee83-643e-4be2-a39b-0c6c5bb5fe3f" xlink:to="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_2858a22b-7e28-4101-aeec-3a4c0cd6bc88" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_0ace949e-3d64-4446-8ea4-4e72f9fcf0a6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_7e46fc32-894e-461a-b3a7-3d9661156e0d" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_0ace949e-3d64-4446-8ea4-4e72f9fcf0a6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_0ace949e-3d64-4446-8ea4-4e72f9fcf0a6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_0ace949e-3d64-4446-8ea4-4e72f9fcf0a6" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_0ace949e-3d64-4446-8ea4-4e72f9fcf0a6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_791d8c1e-8824-4fb2-a8b3-e7a3313645e3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_0ace949e-3d64-4446-8ea4-4e72f9fcf0a6" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_791d8c1e-8824-4fb2-a8b3-e7a3313645e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_NetInvestmentInLeasesAndFinancedSalesReceivablesIncludingAccruedFinanceIncomeMember_1aeb80b0-f577-40d1-866f-751e401bd87c" xlink:href="imax-20250331.xsd#imax_NetInvestmentInLeasesAndFinancedSalesReceivablesIncludingAccruedFinanceIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_791d8c1e-8824-4fb2-a8b3-e7a3313645e3" xlink:to="loc_imax_NetInvestmentInLeasesAndFinancedSalesReceivablesIncludingAccruedFinanceIncomeMember_1aeb80b0-f577-40d1-866f-751e401bd87c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_NetInvestmentInLeasesIncludingAccruedFinanceIncomeMember_00be5aa1-c9d0-44b1-b76b-cdc9ba13795e" xlink:href="imax-20250331.xsd#imax_NetInvestmentInLeasesIncludingAccruedFinanceIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_NetInvestmentInLeasesAndFinancedSalesReceivablesIncludingAccruedFinanceIncomeMember_1aeb80b0-f577-40d1-866f-751e401bd87c" xlink:to="loc_imax_NetInvestmentInLeasesIncludingAccruedFinanceIncomeMember_00be5aa1-c9d0-44b1-b76b-cdc9ba13795e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_FinancedSalesReceivablesIncludingAccruedFinanceIncomeMember_440b510e-dd11-4d1c-aa3d-5ae3e1d42b0a" xlink:href="imax-20250331.xsd#imax_FinancedSalesReceivablesIncludingAccruedFinanceIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_NetInvestmentInLeasesAndFinancedSalesReceivablesIncludingAccruedFinanceIncomeMember_1aeb80b0-f577-40d1-866f-751e401bd87c" xlink:to="loc_imax_FinancedSalesReceivablesIncludingAccruedFinanceIncomeMember_440b510e-dd11-4d1c-aa3d-5ae3e1d42b0a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_f4162812-b96c-48d4-9aa8-7d7b8026417e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_7e46fc32-894e-461a-b3a7-3d9661156e0d" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_f4162812-b96c-48d4-9aa8-7d7b8026417e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesBillingStatusDomain_f4162812-b96c-48d4-9aa8-7d7b8026417e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReceivablesBillingStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_f4162812-b96c-48d4-9aa8-7d7b8026417e" xlink:to="loc_us-gaap_ReceivablesBillingStatusDomain_f4162812-b96c-48d4-9aa8-7d7b8026417e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesBillingStatusDomain_3654e9a2-d619-474d-8ac0-89c84998c925" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReceivablesBillingStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_f4162812-b96c-48d4-9aa8-7d7b8026417e" xlink:to="loc_us-gaap_ReceivablesBillingStatusDomain_3654e9a2-d619-474d-8ac0-89c84998c925" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BilledRevenuesMember_dc9363a5-31df-48aa-b68c-836a17b9c293" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BilledRevenuesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivablesBillingStatusDomain_3654e9a2-d619-474d-8ac0-89c84998c925" xlink:to="loc_us-gaap_BilledRevenuesMember_dc9363a5-31df-48aa-b68c-836a17b9c293" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnbilledRevenuesMember_c9218c5f-1ba5-4188-aee3-5677a13399b3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_UnbilledRevenuesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivablesBillingStatusDomain_3654e9a2-d619-474d-8ac0-89c84998c925" xlink:to="loc_us-gaap_UnbilledRevenuesMember_c9218c5f-1ba5-4188-aee3-5677a13399b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLossAbstract_26f2af8c-e0e7-44b5-b52c-8cb1eb6ca7f5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLossAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_2937cbf0-311b-47ac-af18-eda58b934efb" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLossAbstract_26f2af8c-e0e7-44b5-b52c-8cb1eb6ca7f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLease_abdf535c-3134-4eb3-b583-0a8fbf2c48a0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLossAbstract_26f2af8c-e0e7-44b5-b52c-8cb1eb6ca7f5" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLease_abdf535c-3134-4eb3-b583-0a8fbf2c48a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAllowanceForCreditLoss_c1a081bc-b681-4360-adba-59cbee467a57" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLeaseAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLossAbstract_26f2af8c-e0e7-44b5-b52c-8cb1eb6ca7f5" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAllowanceForCreditLoss_c1a081bc-b681-4360-adba-59cbee467a57" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLoss_4be71791-4009-4baf-806b-f4898d523b5a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLossAbstract_26f2af8c-e0e7-44b5-b52c-8cb1eb6ca7f5" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLoss_4be71791-4009-4baf-806b-f4898d523b5a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableNetAbstract_9ef71a10-d244-4f85-9c8f-33422ec9e526" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NotesReceivableNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_2937cbf0-311b-47ac-af18-eda58b934efb" xlink:to="loc_us-gaap_NotesReceivableNetAbstract_9ef71a10-d244-4f85-9c8f-33422ec9e526" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableGross_181046b9-ba23-483c-a90f-a2fd9ab05d5c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NotesReceivableGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NotesReceivableNetAbstract_9ef71a10-d244-4f85-9c8f-33422ec9e526" xlink:to="loc_us-gaap_NotesReceivableGross_181046b9-ba23-483c-a90f-a2fd9ab05d5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_38afc986-d7bf-4180-b2e0-9d190c2dbb55" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NotesReceivableNetAbstract_9ef71a10-d244-4f85-9c8f-33422ec9e526" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_38afc986-d7bf-4180-b2e0-9d190c2dbb55" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableNet_9a70d0d8-b416-4619-8da3-a1ccd0450e0b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NotesReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NotesReceivableNetAbstract_9ef71a10-d244-4f85-9c8f-33422ec9e526" xlink:to="loc_us-gaap_NotesReceivableNet_9a70d0d8-b416-4619-8da3-a1ccd0450e0b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLossAbstract_74000b41-3010-4042-bfac-93aa9a3eeefe" xlink:href="imax-20250331.xsd#imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLossAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_2937cbf0-311b-47ac-af18-eda58b934efb" xlink:to="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLossAbstract_74000b41-3010-4042-bfac-93aa9a3eeefe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableBeforeAllowanceForCreditLoss_cc955172-845d-4e2f-b01b-ba7b7a8c5589" xlink:href="imax-20250331.xsd#imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLossAbstract_74000b41-3010-4042-bfac-93aa9a3eeefe" xlink:to="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableBeforeAllowanceForCreditLoss_cc955172-845d-4e2f-b01b-ba7b7a8c5589" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAllowanceForCreditLoss_35f7b26b-9f92-4f45-b7d9-ed6887b7b70b" xlink:href="imax-20250331.xsd#imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLossAbstract_74000b41-3010-4042-bfac-93aa9a3eeefe" xlink:to="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAllowanceForCreditLoss_35f7b26b-9f92-4f45-b7d9-ed6887b7b70b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLoss_1bb4e6d7-67cb-4339-9884-1c7c90fa5289" xlink:href="imax-20250331.xsd#imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLossAbstract_74000b41-3010-4042-bfac-93aa9a3eeefe" xlink:to="loc_imax_SalesTypeLeaseNetInvestmentInLeaseAndFinancingReceivableAfterAllowanceForCreditLoss_1bb4e6d7-67cb-4339-9884-1c7c90fa5289" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/ReceivablesSummaryofAllowanceForCreditLossesRelatedtoVariableConsiderationReceivablesDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#ReceivablesSummaryofAllowanceForCreditLossesRelatedtoVariableConsiderationReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/ReceivablesSummaryofAllowanceForCreditLossesRelatedtoVariableConsiderationReceivablesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_50c80346-bc0c-48a1-92be-c1082e6298d1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_11e0d0bd-6057-408e-ab6f-53a6d462f602" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_50c80346-bc0c-48a1-92be-c1082e6298d1" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_11e0d0bd-6057-408e-ab6f-53a6d462f602" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_f4441f9b-e2f4-4394-9f23-9323c34e411e" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_11e0d0bd-6057-408e-ab6f-53a6d462f602" xlink:to="loc_srt_ProductOrServiceAxis_f4441f9b-e2f4-4394-9f23-9323c34e411e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_f4441f9b-e2f4-4394-9f23-9323c34e411e_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_f4441f9b-e2f4-4394-9f23-9323c34e411e" xlink:to="loc_srt_ProductsAndServicesDomain_f4441f9b-e2f4-4394-9f23-9323c34e411e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_d788ae3e-89c6-4540-ad95-1f733e779eb9" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_f4441f9b-e2f4-4394-9f23-9323c34e411e" xlink:to="loc_srt_ProductsAndServicesDomain_d788ae3e-89c6-4540-ad95-1f733e779eb9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TheaterOperatorsMember_9e4defbd-3455-46b3-9c45-56ee9eb83b4d" xlink:href="imax-20250331.xsd#imax_TheaterOperatorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_d788ae3e-89c6-4540-ad95-1f733e779eb9" xlink:to="loc_imax_TheaterOperatorsMember_9e4defbd-3455-46b3-9c45-56ee9eb83b4d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_9013316a-7307-40eb-b2f0-e4c41885ea74" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_50c80346-bc0c-48a1-92be-c1082e6298d1" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_9013316a-7307-40eb-b2f0-e4c41885ea74" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_6aa4be99-36c5-4e2a-9273-930684837fb1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_9013316a-7307-40eb-b2f0-e4c41885ea74" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_6aa4be99-36c5-4e2a-9273-930684837fb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLossesExpensed_ee5820bb-95ae-4f67-9815-2ad45453443a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProvisionForLoanLossesExpensed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_9013316a-7307-40eb-b2f0-e4c41885ea74" xlink:to="loc_us-gaap_ProvisionForLoanLossesExpensed_ee5820bb-95ae-4f67-9815-2ad45453443a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation_3a69d354-9765-4a0b-be37-83bac29b4c47" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_9013316a-7307-40eb-b2f0-e4c41885ea74" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation_3a69d354-9765-4a0b-be37-83bac29b4c47" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_65b37f2f-883c-4b8e-b02d-88441cfed03d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/LeaseArrangementsLesseeAdditionalInformationDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#LeaseArrangementsLesseeAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/LeaseArrangementsLesseeAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_4397851a-85ca-44bf-ba97-af7d2f129606" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_a587e683-aba8-485d-9425-592cfbfaed5b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_4397851a-85ca-44bf-ba97-af7d2f129606" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_a587e683-aba8-485d-9425-592cfbfaed5b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_0a556795-21a3-4736-9297-c4b962859b07" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_a587e683-aba8-485d-9425-592cfbfaed5b" xlink:to="loc_srt_RangeAxis_0a556795-21a3-4736-9297-c4b962859b07" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_0a556795-21a3-4736-9297-c4b962859b07_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_0a556795-21a3-4736-9297-c4b962859b07" xlink:to="loc_srt_RangeMember_0a556795-21a3-4736-9297-c4b962859b07_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_55641854-9ed4-43dd-861b-1a060b0cdbe8" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_0a556795-21a3-4736-9297-c4b962859b07" xlink:to="loc_srt_RangeMember_55641854-9ed4-43dd-861b-1a060b0cdbe8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_fe31cac2-f846-4c09-a46e-5ea722d9ae45" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_55641854-9ed4-43dd-861b-1a060b0cdbe8" xlink:to="loc_srt_MinimumMember_fe31cac2-f846-4c09-a46e-5ea722d9ae45" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_342430ac-6744-4885-9d46-a3361c794a3e" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_55641854-9ed4-43dd-861b-1a060b0cdbe8" xlink:to="loc_srt_MaximumMember_342430ac-6744-4885-9d46-a3361c794a3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_5a16c60a-abea-49c6-bc48-75fccf8bfa84" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseRenewalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_4397851a-85ca-44bf-ba97-af7d2f129606" xlink:to="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_5a16c60a-abea-49c6-bc48-75fccf8bfa84" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/LeaseArrangementsLessorAdditionalInformationDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#LeaseArrangementsLessorAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/LeaseArrangementsLessorAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorLeaseDescriptionLineItems_9756ab4b-ee92-498f-a952-1dd0895fa61a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LessorLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorLeaseDescriptionTable_f12f84df-978d-4321-9fa5-ab38ba0fac5f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LessorLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LessorLeaseDescriptionLineItems_9756ab4b-ee92-498f-a952-1dd0895fa61a" xlink:to="loc_us-gaap_LessorLeaseDescriptionTable_f12f84df-978d-4321-9fa5-ab38ba0fac5f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_2c3162ed-31ee-4d32-9a84-2a45d974565d" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LessorLeaseDescriptionTable_f12f84df-978d-4321-9fa5-ab38ba0fac5f" xlink:to="loc_srt_RangeAxis_2c3162ed-31ee-4d32-9a84-2a45d974565d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2c3162ed-31ee-4d32-9a84-2a45d974565d_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_2c3162ed-31ee-4d32-9a84-2a45d974565d" xlink:to="loc_srt_RangeMember_2c3162ed-31ee-4d32-9a84-2a45d974565d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_08291622-06a0-4dc5-b020-4ceff8bb82cd" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_2c3162ed-31ee-4d32-9a84-2a45d974565d" xlink:to="loc_srt_RangeMember_08291622-06a0-4dc5-b020-4ceff8bb82cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_029ea410-7d53-4623-9b0f-30a36c38e5d4" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_08291622-06a0-4dc5-b020-4ceff8bb82cd" xlink:to="loc_srt_MinimumMember_029ea410-7d53-4623-9b0f-30a36c38e5d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_62e1fc22-fb08-44f8-a403-e75345b7134e" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_08291622-06a0-4dc5-b020-4ceff8bb82cd" xlink:to="loc_srt_MaximumMember_62e1fc22-fb08-44f8-a403-e75345b7134e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorSalesTypeLeaseTermOfContract1_d157f973-3631-4468-9181-f2e77bae6ca6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LessorSalesTypeLeaseTermOfContract1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LessorLeaseDescriptionLineItems_9756ab4b-ee92-498f-a952-1dd0895fa61a" xlink:to="loc_us-gaap_LessorSalesTypeLeaseTermOfContract1_d157f973-3631-4468-9181-f2e77bae6ca6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_NonCancellableJointRevenueSharingArrangementTerms_5ce9b607-44e9-48c3-8f67-1da1344fc0b5" xlink:href="imax-20250331.xsd#imax_NonCancellableJointRevenueSharingArrangementTerms"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LessorLeaseDescriptionLineItems_9756ab4b-ee92-498f-a952-1dd0895fa61a" xlink:to="loc_imax_NonCancellableJointRevenueSharingArrangementTerms_5ce9b607-44e9-48c3-8f67-1da1344fc0b5" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/InventoriesAdditionalInformationDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#InventoriesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/InventoriesAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryLineItems_6034293a-8641-40f8-8670-c305bd74b112" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryCurrentTable_075b33a3-055d-4f66-89ee-12374f445af1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryCurrentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_InventoryLineItems_6034293a-8641-40f8-8670-c305bd74b112" xlink:to="loc_us-gaap_InventoryCurrentTable_075b33a3-055d-4f66-89ee-12374f445af1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_e6535448-4a74-4b3e-ad9b-89f4c3a4dbde" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InventoryCurrentTable_075b33a3-055d-4f66-89ee-12374f445af1" xlink:to="loc_srt_ProductOrServiceAxis_e6535448-4a74-4b3e-ad9b-89f4c3a4dbde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_e6535448-4a74-4b3e-ad9b-89f4c3a4dbde_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_e6535448-4a74-4b3e-ad9b-89f4c3a4dbde" xlink:to="loc_srt_ProductsAndServicesDomain_e6535448-4a74-4b3e-ad9b-89f4c3a4dbde_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_23a6bcba-d0a0-429c-91a3-3dccf5209a4f" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_e6535448-4a74-4b3e-ad9b-89f4c3a4dbde" xlink:to="loc_srt_ProductsAndServicesDomain_23a6bcba-d0a0-429c-91a3-3dccf5209a4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TechnologySalesMember_dbed8977-7aa2-4c3d-a2e7-d84946d3b204" xlink:href="imax-20250331.xsd#imax_TechnologySalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_23a6bcba-d0a0-429c-91a3-3dccf5209a4f" xlink:to="loc_imax_TechnologySalesMember_dbed8977-7aa2-4c3d-a2e7-d84946d3b204" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_FinishedGoodsInventoryWithTitlePassedToCustomer_d37d5181-cc49-4daf-aaf4-69c3c206812d" xlink:href="imax-20250331.xsd#imax_FinishedGoodsInventoryWithTitlePassedToCustomer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_6034293a-8641-40f8-8670-c305bd74b112" xlink:to="loc_imax_FinishedGoodsInventoryWithTitlePassedToCustomer_d37d5181-cc49-4daf-aaf4-69c3c206812d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWriteDown_f9a4d348-c4df-4196-854c-f64841e10bbf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryWriteDown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_6034293a-8641-40f8-8670-c305bd74b112" xlink:to="loc_us-gaap_InventoryWriteDown_f9a4d348-c4df-4196-854c-f64841e10bbf" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/BorrowingsRevolvingCreditFacilityBorrowingsNetDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#BorrowingsRevolvingCreditFacilityBorrowingsNetDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/BorrowingsRevolvingCreditFacilityBorrowingsNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_f6bba2ea-d969-4dea-917c-49a8efa9a3f2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_86bd2fe6-e2e4-49a5-9c07-eb5cca4ba242" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f6bba2ea-d969-4dea-917c-49a8efa9a3f2" xlink:to="loc_us-gaap_DebtInstrumentTable_86bd2fe6-e2e4-49a5-9c07-eb5cca4ba242" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_1c2f49b8-1673-4ce7-859b-15adb18b51a5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_86bd2fe6-e2e4-49a5-9c07-eb5cca4ba242" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_1c2f49b8-1673-4ce7-859b-15adb18b51a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_1c2f49b8-1673-4ce7-859b-15adb18b51a5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityLenderDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_1c2f49b8-1673-4ce7-859b-15adb18b51a5" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_1c2f49b8-1673-4ce7-859b-15adb18b51a5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_417a522a-8c9c-452e-ade3-e7afa3810ff8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityLenderDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_1c2f49b8-1673-4ce7-859b-15adb18b51a5" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_417a522a-8c9c-452e-ade3-e7afa3810ff8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_WellsFargoCreditFacilityMember_dbf05d67-5354-4016-b3b9-b4ba524168c0" xlink:href="imax-20250331.xsd#imax_WellsFargoCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_417a522a-8c9c-452e-ade3-e7afa3810ff8" xlink:to="loc_imax_WellsFargoCreditFacilityMember_dbf05d67-5354-4016-b3b9-b4ba524168c0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_07700501-b48b-4a31-93f9-3eaa0b88da38" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_86bd2fe6-e2e4-49a5-9c07-eb5cca4ba242" xlink:to="loc_us-gaap_CreditFacilityAxis_07700501-b48b-4a31-93f9-3eaa0b88da38" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_07700501-b48b-4a31-93f9-3eaa0b88da38_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_07700501-b48b-4a31-93f9-3eaa0b88da38" xlink:to="loc_us-gaap_CreditFacilityDomain_07700501-b48b-4a31-93f9-3eaa0b88da38_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_2eaead6b-183a-454d-9bab-44ee1e788a82" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_07700501-b48b-4a31-93f9-3eaa0b88da38" xlink:to="loc_us-gaap_CreditFacilityDomain_2eaead6b-183a-454d-9bab-44ee1e788a82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_db67e06d-31a9-4037-9b4c-dc535f4ad5c7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_2eaead6b-183a-454d-9bab-44ee1e788a82" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_db67e06d-31a9-4037-9b4c-dc535f4ad5c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_d89c77f0-08d9-4bb1-814c-fc2cec5ca739" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f6bba2ea-d969-4dea-917c-49a8efa9a3f2" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_d89c77f0-08d9-4bb1-814c-fc2cec5ca739" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_b5e5a433-0693-4c68-9995-fc10d98b4116" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_UnamortizedDebtIssuanceExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f6bba2ea-d969-4dea-917c-49a8efa9a3f2" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_b5e5a433-0693-4c68-9995-fc10d98b4116" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_dd7f27c4-12ee-447d-ab4f-b019eafda41e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f6bba2ea-d969-4dea-917c-49a8efa9a3f2" xlink:to="loc_us-gaap_LongTermDebt_dd7f27c4-12ee-447d-ab4f-b019eafda41e" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/BorrowingsAdditionalInformationDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#BorrowingsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/BorrowingsAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_7c97f640-ed00-4325-b2cb-bf1ea1f57147" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_us-gaap_DebtInstrumentTable_7c97f640-ed00-4325-b2cb-bf1ea1f57147" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_9503fa7f-06fd-4db2-a997-120ee0016775" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_7c97f640-ed00-4325-b2cb-bf1ea1f57147" xlink:to="loc_srt_RangeAxis_9503fa7f-06fd-4db2-a997-120ee0016775" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_9503fa7f-06fd-4db2-a997-120ee0016775_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_9503fa7f-06fd-4db2-a997-120ee0016775" xlink:to="loc_srt_RangeMember_9503fa7f-06fd-4db2-a997-120ee0016775_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_5267d40a-1562-46d1-90be-a4d30864cbde" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_9503fa7f-06fd-4db2-a997-120ee0016775" xlink:to="loc_srt_RangeMember_5267d40a-1562-46d1-90be-a4d30864cbde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_c4eb9d50-60af-43ff-a9cd-8b141179d9bb" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_5267d40a-1562-46d1-90be-a4d30864cbde" xlink:to="loc_srt_MinimumMember_c4eb9d50-60af-43ff-a9cd-8b141179d9bb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_106c25e1-efcb-4cd1-9076-32b040ec545e" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_5267d40a-1562-46d1-90be-a4d30864cbde" xlink:to="loc_srt_MaximumMember_106c25e1-efcb-4cd1-9076-32b040ec545e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_9fabd01e-8ce4-4b7c-bdb1-2cd1f72b8ac7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_7c97f640-ed00-4325-b2cb-bf1ea1f57147" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_9fabd01e-8ce4-4b7c-bdb1-2cd1f72b8ac7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_9fabd01e-8ce4-4b7c-bdb1-2cd1f72b8ac7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityLenderDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_9fabd01e-8ce4-4b7c-bdb1-2cd1f72b8ac7" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_9fabd01e-8ce4-4b7c-bdb1-2cd1f72b8ac7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_f8566db3-b1c8-47b5-b9c1-c524722e28e0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityLenderDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_9fabd01e-8ce4-4b7c-bdb1-2cd1f72b8ac7" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_f8566db3-b1c8-47b5-b9c1-c524722e28e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_WellsFargoCreditFacilityMember_ae6b1aef-c01a-455c-a5b1-1c559863eadb" xlink:href="imax-20250331.xsd#imax_WellsFargoCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_f8566db3-b1c8-47b5-b9c1-c524722e28e0" xlink:to="loc_imax_WellsFargoCreditFacilityMember_ae6b1aef-c01a-455c-a5b1-1c559863eadb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_bcbe9b59-e1d5-4c51-9067-032b56c8cb02" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_f8566db3-b1c8-47b5-b9c1-c524722e28e0" xlink:to="loc_us-gaap_LetterOfCreditMember_bcbe9b59-e1d5-4c51-9067-032b56c8cb02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_NationalBankOfCanadaFacilityMember_f417f0b0-6731-41e9-8034-a78cccaeae79" xlink:href="imax-20250331.xsd#imax_NationalBankOfCanadaFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_f8566db3-b1c8-47b5-b9c1-c524722e28e0" xlink:to="loc_imax_NationalBankOfCanadaFacilityMember_f417f0b0-6731-41e9-8034-a78cccaeae79" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingActivityByTypeAxis_38a5fcb0-b919-46c5-a8eb-7bdfb376064e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TradingActivityByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_7c97f640-ed00-4325-b2cb-bf1ea1f57147" xlink:to="loc_us-gaap_TradingActivityByTypeAxis_38a5fcb0-b919-46c5-a8eb-7bdfb376064e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingActivityByTypeDomain_38a5fcb0-b919-46c5-a8eb-7bdfb376064e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TradingActivityByTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TradingActivityByTypeAxis_38a5fcb0-b919-46c5-a8eb-7bdfb376064e" xlink:to="loc_us-gaap_TradingActivityByTypeDomain_38a5fcb0-b919-46c5-a8eb-7bdfb376064e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingActivityByTypeDomain_5ee4e055-012d-4db6-ae9c-fe02987defda" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TradingActivityByTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TradingActivityByTypeAxis_38a5fcb0-b919-46c5-a8eb-7bdfb376064e" xlink:to="loc_us-gaap_TradingActivityByTypeDomain_5ee4e055-012d-4db6-ae9c-fe02987defda" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeMember_6d516be1-c861-4c63-9926-8677b677abc8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ForeignExchangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TradingActivityByTypeDomain_5ee4e055-012d-4db6-ae9c-fe02987defda" xlink:to="loc_us-gaap_ForeignExchangeMember_6d516be1-c861-4c63-9926-8677b677abc8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_d03c4471-87ec-4034-b0ee-f7571eaa0e48" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_7c97f640-ed00-4325-b2cb-bf1ea1f57147" xlink:to="loc_us-gaap_DebtInstrumentAxis_d03c4471-87ec-4034-b0ee-f7571eaa0e48" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_d03c4471-87ec-4034-b0ee-f7571eaa0e48_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_d03c4471-87ec-4034-b0ee-f7571eaa0e48" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_d03c4471-87ec-4034-b0ee-f7571eaa0e48_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_79443d02-b918-4c35-9416-cc4dc93dee22" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_d03c4471-87ec-4034-b0ee-f7571eaa0e48" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_79443d02-b918-4c35-9416-cc4dc93dee22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_BankOfChinaFacilityMember_dfaf2b16-a986-49df-b3a3-621c67e6f360" xlink:href="imax-20250331.xsd#imax_BankOfChinaFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_79443d02-b918-4c35-9416-cc4dc93dee22" xlink:to="loc_imax_BankOfChinaFacilityMember_dfaf2b16-a986-49df-b3a3-621c67e6f360" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_HsbcChinaFacilityMember_15fd218c-a472-4ca3-bcb7-49c38c118d8c" xlink:href="imax-20250331.xsd#imax_HsbcChinaFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_79443d02-b918-4c35-9416-cc4dc93dee22" xlink:to="loc_imax_HsbcChinaFacilityMember_15fd218c-a472-4ca3-bcb7-49c38c118d8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_ConvertibleSeniorNotesDueTwoThousandAndTwentySixMember_2ec76082-76fb-4b47-90f7-c686a40e995d" xlink:href="imax-20250331.xsd#imax_ConvertibleSeniorNotesDueTwoThousandAndTwentySixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_79443d02-b918-4c35-9416-cc4dc93dee22" xlink:to="loc_imax_ConvertibleSeniorNotesDueTwoThousandAndTwentySixMember_2ec76082-76fb-4b47-90f7-c686a40e995d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_FederalEconomicDevelopmentLoanPayableMember_1d512da3-23a1-42f5-9f2d-498c8673ec15" xlink:href="imax-20250331.xsd#imax_FederalEconomicDevelopmentLoanPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_79443d02-b918-4c35-9416-cc4dc93dee22" xlink:to="loc_imax_FederalEconomicDevelopmentLoanPayableMember_1d512da3-23a1-42f5-9f2d-498c8673ec15" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_92538179-c947-47b8-a4fb-a3a73382424d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_92538179-c947-47b8-a4fb-a3a73382424d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_LineOfCreditFacilityBorrowingCapacityUnderUncommittedAccordionFeature_e4683d53-e880-4012-ae54-a8e5adf67a82" xlink:href="imax-20250331.xsd#imax_LineOfCreditFacilityBorrowingCapacityUnderUncommittedAccordionFeature"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_imax_LineOfCreditFacilityBorrowingCapacityUnderUncommittedAccordionFeature_e4683d53-e880-4012-ae54-a8e5adf67a82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_DebtInstrumentNetLeverageRatio_e9e1ad86-7b42-45b9-86fe-e2a7dba119d3" xlink:href="imax-20250331.xsd#imax_DebtInstrumentNetLeverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_imax_DebtInstrumentNetLeverageRatio_e9e1ad86-7b42-45b9-86fe-e2a7dba119d3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_f8505064-99b8-4b1c-b590-247cae11b280" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_f8505064-99b8-4b1c-b590-247cae11b280" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_987bce24-e172-43d2-b5f9-de31cda864ff" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_987bce24-e172-43d2-b5f9-de31cda864ff" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_12a72b33-65ea-4870-91ff-48aeb50ae298" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityInterestRateDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_12a72b33-65ea-4870-91ff-48aeb50ae298" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_LettersOfCreditOrAdvancePaymentGuarantees_003b06cb-9734-45ba-919a-7f21a0b08042" xlink:href="imax-20250331.xsd#imax_LettersOfCreditOrAdvancePaymentGuarantees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_imax_LettersOfCreditOrAdvancePaymentGuarantees_003b06cb-9734-45ba-919a-7f21a0b08042" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_9470a90d-ba48-48e7-863e-9456c9089c7b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_9470a90d-ba48-48e7-863e-9456c9089c7b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_UnrealizedGainLossOnOutstandingForeignCurrencyForwardContracts_760a75dd-081a-47f4-b404-26bcd3078b7d" xlink:href="imax-20250331.xsd#imax_UnrealizedGainLossOnOutstandingForeignCurrencyForwardContracts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_imax_UnrealizedGainLossOnOutstandingForeignCurrencyForwardContracts_760a75dd-081a-47f4-b404-26bcd3078b7d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_NotionalAmountForWhichArrangementsCanBeEntered_6103f3e8-5d18-44d5-a8ff-c8bd4eb740d3" xlink:href="imax-20250331.xsd#imax_NotionalAmountForWhichArrangementsCanBeEntered"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_imax_NotionalAmountForWhichArrangementsCanBeEntered_6103f3e8-5d18-44d5-a8ff-c8bd4eb740d3" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_2021a85a-44e3-4356-9b42-159629605552" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_2021a85a-44e3-4356-9b42-159629605552" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_f91cbafc-f363-4385-a3a6-8e457704de65" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_f91cbafc-f363-4385-a3a6-8e457704de65" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_6429bf34-6423-4a13-a1cf-cdc17f0f15ab" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_6429bf34-6423-4a13-a1cf-cdc17f0f15ab" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_a85eb300-3409-4145-a46d-1e6436e82c1b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_a85eb300-3409-4145-a46d-1e6436e82c1b" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFairValue_b2e36785-f2fb-4fa3-b773-cf71d18b6678" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5a2e9567-67bf-496b-9562-d3ed102df70d" xlink:to="loc_us-gaap_DebtInstrumentFairValue_b2e36785-f2fb-4fa3-b773-cf71d18b6678" xlink:type="arc" order="14"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/BorrowingsSummaryofConvertibleNotesNetDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#BorrowingsSummaryofConvertibleNotesNetDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/BorrowingsSummaryofConvertibleNotesNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_472f6bf3-53e8-4fb4-9228-aaaf0fd23051" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_647a1947-ac47-4743-85aa-00ed54c257ab" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_472f6bf3-53e8-4fb4-9228-aaaf0fd23051" xlink:to="loc_us-gaap_DebtInstrumentTable_647a1947-ac47-4743-85aa-00ed54c257ab" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_291a1af8-6641-43ea-a527-6407654e7079" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_647a1947-ac47-4743-85aa-00ed54c257ab" xlink:to="loc_us-gaap_DebtInstrumentAxis_291a1af8-6641-43ea-a527-6407654e7079" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_291a1af8-6641-43ea-a527-6407654e7079_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_291a1af8-6641-43ea-a527-6407654e7079" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_291a1af8-6641-43ea-a527-6407654e7079_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_f7398612-3321-4ad2-829e-fc305cc18f0e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_291a1af8-6641-43ea-a527-6407654e7079" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_f7398612-3321-4ad2-829e-fc305cc18f0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_ConvertibleSeniorNotesDueTwoThousandAndTwentySixMember_ee62d7e2-a297-475c-996b-6e6c5fd22320" xlink:href="imax-20250331.xsd#imax_ConvertibleSeniorNotesDueTwoThousandAndTwentySixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f7398612-3321-4ad2-829e-fc305cc18f0e" xlink:to="loc_imax_ConvertibleSeniorNotesDueTwoThousandAndTwentySixMember_ee62d7e2-a297-475c-996b-6e6c5fd22320" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_FederalEconomicDevelopmentLoanPayableMember_e23022df-3f46-47c2-83af-1d526363cbdd" xlink:href="imax-20250331.xsd#imax_FederalEconomicDevelopmentLoanPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f7398612-3321-4ad2-829e-fc305cc18f0e" xlink:to="loc_imax_FederalEconomicDevelopmentLoanPayableMember_e23022df-3f46-47c2-83af-1d526363cbdd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_902850e2-5b72-4815-b7b6-eafc0c4e6efb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_472f6bf3-53e8-4fb4-9228-aaaf0fd23051" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_902850e2-5b72-4815-b7b6-eafc0c4e6efb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_98992b98-7264-406d-989d-b87cdc0e028e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_UnamortizedDebtIssuanceExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_472f6bf3-53e8-4fb4-9228-aaaf0fd23051" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_98992b98-7264-406d-989d-b87cdc0e028e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebt_623f49f4-3ee8-4645-9539-4afe1e929ca5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_472f6bf3-53e8-4fb4-9228-aaaf0fd23051" xlink:to="loc_us-gaap_ConvertibleDebt_623f49f4-3ee8-4645-9539-4afe1e929ca5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansPayable_f19372bd-79ac-4b7b-b552-d5f9aa70d124" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LoansPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_472f6bf3-53e8-4fb4-9228-aaaf0fd23051" xlink:to="loc_us-gaap_LoansPayable_f19372bd-79ac-4b7b-b552-d5f9aa70d124" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_UnaccretedInterestBenefit_9a54dfbe-6268-4741-a1ff-6b692ab80f70" xlink:href="imax-20250331.xsd#imax_UnaccretedInterestBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_472f6bf3-53e8-4fb4-9228-aaaf0fd23051" xlink:to="loc_imax_UnaccretedInterestBenefit_9a54dfbe-6268-4741-a1ff-6b692ab80f70" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFairValue_301748b7-8703-4f9a-bda0-9c726fd91808" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_472f6bf3-53e8-4fb4-9228-aaaf0fd23051" xlink:to="loc_us-gaap_DebtInstrumentFairValue_301748b7-8703-4f9a-bda0-9c726fd91808" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_ConvertibleNotesAndOtherBorrowingsNet_cd492a3c-d745-4b5d-829a-db51f4cea939" xlink:href="imax-20250331.xsd#imax_ConvertibleNotesAndOtherBorrowingsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_472f6bf3-53e8-4fb4-9228-aaaf0fd23051" xlink:to="loc_imax_ConvertibleNotesAndOtherBorrowingsNet_cd492a3c-d745-4b5d-829a-db51f4cea939" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/CondensedConsolidatedStatementsofOperationsSupplementalInformationSummaryofSellingExpensesDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#CondensedConsolidatedStatementsofOperationsSupplementalInformationSummaryofSellingExpensesDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/CondensedConsolidatedStatementsofOperationsSupplementalInformationSummaryofSellingExpensesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_imax_DisaggregationOfSellingGeneralAndAdministrativeExpenseLineItems_e74b8a9f-60ee-46ad-acdd-07f33e40e193" xlink:href="imax-20250331.xsd#imax_DisaggregationOfSellingGeneralAndAdministrativeExpenseLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_DisaggregationOfSellingGeneralAndAdministrativeExpenseTable_262e470e-baae-4194-ad95-b6785d491ef2" xlink:href="imax-20250331.xsd#imax_DisaggregationOfSellingGeneralAndAdministrativeExpenseTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_imax_DisaggregationOfSellingGeneralAndAdministrativeExpenseLineItems_e74b8a9f-60ee-46ad-acdd-07f33e40e193" xlink:to="loc_imax_DisaggregationOfSellingGeneralAndAdministrativeExpenseTable_262e470e-baae-4194-ad95-b6785d491ef2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_a9f31f00-8960-4cb1-88b4-4d940a3df78c" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_imax_DisaggregationOfSellingGeneralAndAdministrativeExpenseTable_262e470e-baae-4194-ad95-b6785d491ef2" xlink:to="loc_srt_ProductOrServiceAxis_a9f31f00-8960-4cb1-88b4-4d940a3df78c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_a9f31f00-8960-4cb1-88b4-4d940a3df78c_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_a9f31f00-8960-4cb1-88b4-4d940a3df78c" xlink:to="loc_srt_ProductsAndServicesDomain_a9f31f00-8960-4cb1-88b4-4d940a3df78c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_2ef06241-63af-4c1e-9dd6-08ff56bc7638" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_a9f31f00-8960-4cb1-88b4-4d940a3df78c" xlink:to="loc_srt_ProductsAndServicesDomain_2ef06241-63af-4c1e-9dd6-08ff56bc7638" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TechnologySalesMember_d9556efd-e922-4b29-8bba-7f992f61c45d" xlink:href="imax-20250331.xsd#imax_TechnologySalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_2ef06241-63af-4c1e-9dd6-08ff56bc7638" xlink:to="loc_imax_TechnologySalesMember_d9556efd-e922-4b29-8bba-7f992f61c45d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServiceMember_7fbea1d6-8957-4643-965e-dff375d1ba51" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_2ef06241-63af-4c1e-9dd6-08ff56bc7638" xlink:to="loc_us-gaap_ServiceMember_7fbea1d6-8957-4643-965e-dff375d1ba51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TechnologyRentalsMember_a2c961ad-a2f5-4345-88d0-2496648b799d" xlink:href="imax-20250331.xsd#imax_TechnologyRentalsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_2ef06241-63af-4c1e-9dd6-08ff56bc7638" xlink:to="loc_imax_TechnologyRentalsMember_a2c961ad-a2f5-4345-88d0-2496648b799d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_SalesCommissionsAndFeesReversalOfFees_ec4e2591-dfa0-4a51-a05e-e892f91e6f04" xlink:href="imax-20250331.xsd#imax_SalesCommissionsAndFeesReversalOfFees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_DisaggregationOfSellingGeneralAndAdministrativeExpenseLineItems_e74b8a9f-60ee-46ad-acdd-07f33e40e193" xlink:to="loc_imax_SalesCommissionsAndFeesReversalOfFees_ec4e2591-dfa0-4a51-a05e-e892f91e6f04" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_MarketingAndAdvertisingExpenseReversal_ec12de30-f9d8-4056-b21e-4377279ecbc4" xlink:href="imax-20250331.xsd#imax_MarketingAndAdvertisingExpenseReversal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_imax_DisaggregationOfSellingGeneralAndAdministrativeExpenseLineItems_e74b8a9f-60ee-46ad-acdd-07f33e40e193" xlink:to="loc_imax_MarketingAndAdvertisingExpenseReversal_ec12de30-f9d8-4056-b21e-4377279ecbc4" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/CondensedConsolidatedStatementsofOperationsSupplementalInformationAdditionalInformationDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#CondensedConsolidatedStatementsofOperationsSupplementalInformationAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/CondensedConsolidatedStatementsofOperationsSupplementalInformationAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityLineItems_40574bdc-f52a-4c8a-9715-e65d43598b5a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_VariableInterestEntityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_8171f088-c968-42e8-86bf-b45cd41806fc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_40574bdc-f52a-4c8a-9715-e65d43598b5a" xlink:to="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_8171f088-c968-42e8-86bf-b45cd41806fc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfArrangementAxis_ddad5c61-0de1-42ec-8211-4ef06b79cc20" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TypeOfArrangementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_8171f088-c968-42e8-86bf-b45cd41806fc" xlink:to="loc_us-gaap_TypeOfArrangementAxis_ddad5c61-0de1-42ec-8211-4ef06b79cc20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_ddad5c61-0de1-42ec-8211-4ef06b79cc20_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TypeOfArrangementAxis_ddad5c61-0de1-42ec-8211-4ef06b79cc20" xlink:to="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_ddad5c61-0de1-42ec-8211-4ef06b79cc20_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_0fc5bb8e-a583-42fe-b791-87f3f3be3705" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TypeOfArrangementAxis_ddad5c61-0de1-42ec-8211-4ef06b79cc20" xlink:to="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_0fc5bb8e-a583-42fe-b791-87f3f3be3705" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_JointRevenueSharingArrangementMember_16ecf242-754b-47f3-93cf-609384ab7ee6" xlink:href="imax-20250331.xsd#imax_JointRevenueSharingArrangementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_0fc5bb8e-a583-42fe-b791-87f3f3be3705" xlink:to="loc_imax_JointRevenueSharingArrangementMember_16ecf242-754b-47f3-93cf-609384ab7ee6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_ce81c1b3-0da5-41af-9f9c-e0d08eab770d" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_8171f088-c968-42e8-86bf-b45cd41806fc" xlink:to="loc_srt_ConsolidatedEntitiesAxis_ce81c1b3-0da5-41af-9f9c-e0d08eab770d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_ce81c1b3-0da5-41af-9f9c-e0d08eab770d_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_ce81c1b3-0da5-41af-9f9c-e0d08eab770d" xlink:to="loc_srt_ConsolidatedEntitiesDomain_ce81c1b3-0da5-41af-9f9c-e0d08eab770d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_c085f0f6-90d0-4e03-924a-64358d4fd5d9" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_ce81c1b3-0da5-41af-9f9c-e0d08eab770d" xlink:to="loc_srt_ConsolidatedEntitiesDomain_c085f0f6-90d0-4e03-924a-64358d4fd5d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_6924f576-c0a0-47bb-a04a-ddd42f9ec5f1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_c085f0f6-90d0-4e03-924a-64358d4fd5d9" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_6924f576-c0a0-47bb-a04a-ddd42f9ec5f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_bde987d8-32cb-4ec8-b077-b1d251ad21cf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_40574bdc-f52a-4c8a-9715-e65d43598b5a" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_bde987d8-32cb-4ec8-b077-b1d251ad21cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_033e1db2-2c5a-4841-b86d-ae135be67fe3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_40574bdc-f52a-4c8a-9715-e65d43598b5a" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_033e1db2-2c5a-4841-b86d-ae135be67fe3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_RevenueEarnedFromTransactionsUnderCompanyArrangements_e483a8dc-9bce-4252-824b-9e0d326e8a83" xlink:href="imax-20250331.xsd#imax_RevenueEarnedFromTransactionsUnderCompanyArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_40574bdc-f52a-4c8a-9715-e65d43598b5a" xlink:to="loc_imax_RevenueEarnedFromTransactionsUnderCompanyArrangements_e483a8dc-9bce-4252-824b-9e0d326e8a83" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_NumberOfCoProducedFilmArrangement_e9c4b766-1f1d-4486-92fc-08e72aa6772a" xlink:href="imax-20250331.xsd#imax_NumberOfCoProducedFilmArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_40574bdc-f52a-4c8a-9715-e65d43598b5a" xlink:to="loc_imax_NumberOfCoProducedFilmArrangement_e9c4b766-1f1d-4486-92fc-08e72aa6772a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_3345e8a9-4b58-4be7-916b-ed6b0f406087" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_40574bdc-f52a-4c8a-9715-e65d43598b5a" xlink:to="loc_us-gaap_Assets_3345e8a9-4b58-4be7-916b-ed6b0f406087" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_9185164d-b76d-4815-b37a-7966b985cbcb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_40574bdc-f52a-4c8a-9715-e65d43598b5a" xlink:to="loc_us-gaap_Liabilities_9185164d-b76d-4815-b37a-7966b985cbcb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_NumberOfOtherCoproducedFilmArrangements_48eeed30-6228-42b2-a686-ff2f00fb1b90" xlink:href="imax-20250331.xsd#imax_NumberOfOtherCoproducedFilmArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_40574bdc-f52a-4c8a-9715-e65d43598b5a" xlink:to="loc_imax_NumberOfOtherCoproducedFilmArrangements_48eeed30-6228-42b2-a686-ff2f00fb1b90" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_ExpensesRecoveriesRelatedToCollaborativeArrangements_b6314307-73d4-4559-8de4-47c2f6aecebb" xlink:href="imax-20250331.xsd#imax_ExpensesRecoveriesRelatedToCollaborativeArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_40574bdc-f52a-4c8a-9715-e65d43598b5a" xlink:to="loc_imax_ExpensesRecoveriesRelatedToCollaborativeArrangements_b6314307-73d4-4559-8de4-47c2f6aecebb" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/CapitalStockandReservesAdditionalInformationDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#CapitalStockandReservesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/CapitalStockandReservesAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_907b7c09-ff00-4294-96d2-9e03c81637d0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_907b7c09-ff00-4294-96d2-9e03c81637d0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_b11d56c9-37b1-4908-93aa-a9eacff1ccef" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_907b7c09-ff00-4294-96d2-9e03c81637d0" xlink:to="loc_srt_TitleOfIndividualAxis_b11d56c9-37b1-4908-93aa-a9eacff1ccef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_b11d56c9-37b1-4908-93aa-a9eacff1ccef_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_b11d56c9-37b1-4908-93aa-a9eacff1ccef" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_b11d56c9-37b1-4908-93aa-a9eacff1ccef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_370b5488-0894-4033-9fb8-2d6b742aeb82" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_b11d56c9-37b1-4908-93aa-a9eacff1ccef" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_370b5488-0894-4033-9fb8-2d6b742aeb82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_NonEmployeeMember_f42b9b0b-4e33-4c8e-99d0-8db6b45d16ac" xlink:href="imax-20250331.xsd#imax_NonEmployeeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_370b5488-0894-4033-9fb8-2d6b742aeb82" xlink:to="loc_imax_NonEmployeeMember_f42b9b0b-4e33-4c8e-99d0-8db6b45d16ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_aaada6f4-fd75-45e2-8f71-4ed895c468f8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_907b7c09-ff00-4294-96d2-9e03c81637d0" xlink:to="loc_us-gaap_AwardTypeAxis_aaada6f4-fd75-45e2-8f71-4ed895c468f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_aaada6f4-fd75-45e2-8f71-4ed895c468f8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_aaada6f4-fd75-45e2-8f71-4ed895c468f8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_aaada6f4-fd75-45e2-8f71-4ed895c468f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_00ff7514-7584-4d5a-800b-302c88ec1dd9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_aaada6f4-fd75-45e2-8f71-4ed895c468f8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_00ff7514-7584-4d5a-800b-302c88ec1dd9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_52fa5a4b-f349-4532-8b39-13cc4946fb73" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_00ff7514-7584-4d5a-800b-302c88ec1dd9" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_52fa5a4b-f349-4532-8b39-13cc4946fb73" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_61793b8a-844e-4255-90e8-a5d61ac85129" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_00ff7514-7584-4d5a-800b-302c88ec1dd9" xlink:to="loc_us-gaap_PerformanceSharesMember_61793b8a-844e-4255-90e8-a5d61ac85129" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_91bed912-c35b-4afb-b27a-c95ae5ad6483" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_00ff7514-7584-4d5a-800b-302c88ec1dd9" xlink:to="loc_us-gaap_EmployeeStockOptionMember_91bed912-c35b-4afb-b27a-c95ae5ad6483" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_830c1889-c789-4082-b2ae-6ca2e27e8178" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_907b7c09-ff00-4294-96d2-9e03c81637d0" xlink:to="loc_srt_RangeAxis_830c1889-c789-4082-b2ae-6ca2e27e8178" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_830c1889-c789-4082-b2ae-6ca2e27e8178_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_830c1889-c789-4082-b2ae-6ca2e27e8178" xlink:to="loc_srt_RangeMember_830c1889-c789-4082-b2ae-6ca2e27e8178_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_8e856722-fba2-4ec6-9dae-4c84981071eb" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_830c1889-c789-4082-b2ae-6ca2e27e8178" xlink:to="loc_srt_RangeMember_8e856722-fba2-4ec6-9dae-4c84981071eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_d9fa3b4f-5be8-41b5-9365-f003e6be2077" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_8e856722-fba2-4ec6-9dae-4c84981071eb" xlink:to="loc_srt_MaximumMember_d9fa3b4f-5be8-41b5-9365-f003e6be2077" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_ec1b991f-0bb4-4dc8-9329-23c35b78ef17" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_8e856722-fba2-4ec6-9dae-4c84981071eb" xlink:to="loc_srt_MinimumMember_ec1b991f-0bb4-4dc8-9329-23c35b78ef17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_af3d6742-ba2f-4a43-a33d-4fcdfa32bf59" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_907b7c09-ff00-4294-96d2-9e03c81637d0" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_af3d6742-ba2f-4a43-a33d-4fcdfa32bf59" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_af3d6742-ba2f-4a43-a33d-4fcdfa32bf59_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_af3d6742-ba2f-4a43-a33d-4fcdfa32bf59" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_af3d6742-ba2f-4a43-a33d-4fcdfa32bf59_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_9804de3c-7261-46b2-8c99-b5a039e459da" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_af3d6742-ba2f-4a43-a33d-4fcdfa32bf59" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_9804de3c-7261-46b2-8c99-b5a039e459da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputEbitdaMultipleMember_2de8331f-c938-4b2f-886d-7c680cf62078" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MeasurementInputEbitdaMultipleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_9804de3c-7261-46b2-8c99-b5a039e459da" xlink:to="loc_us-gaap_MeasurementInputEbitdaMultipleMember_2de8331f-c938-4b2f-886d-7c680cf62078" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_baefe64a-465d-4972-a695-a3113c6a2f05" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_907b7c09-ff00-4294-96d2-9e03c81637d0" xlink:to="loc_srt_ConsolidatedEntitiesAxis_baefe64a-465d-4972-a695-a3113c6a2f05" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_baefe64a-465d-4972-a695-a3113c6a2f05_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_baefe64a-465d-4972-a695-a3113c6a2f05" xlink:to="loc_srt_ConsolidatedEntitiesDomain_baefe64a-465d-4972-a695-a3113c6a2f05_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_fd323146-9dbf-4b7e-aeac-b970b5fab75a" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_baefe64a-465d-4972-a695-a3113c6a2f05" xlink:to="loc_srt_ConsolidatedEntitiesDomain_fd323146-9dbf-4b7e-aeac-b970b5fab75a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_IMAXChinaMember_b4ffaf5e-24cf-4d14-a88e-b90422c4f36a" xlink:href="imax-20250331.xsd#imax_IMAXChinaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_fd323146-9dbf-4b7e-aeac-b970b5fab75a" xlink:to="loc_imax_IMAXChinaMember_b4ffaf5e-24cf-4d14-a88e-b90422c4f36a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_24ec8f93-60a2-4db2-ace1-582948d65e40" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_907b7c09-ff00-4294-96d2-9e03c81637d0" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_24ec8f93-60a2-4db2-ace1-582948d65e40" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_24ec8f93-60a2-4db2-ace1-582948d65e40_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_24ec8f93-60a2-4db2-ace1-582948d65e40" xlink:to="loc_us-gaap_EquityComponentDomain_24ec8f93-60a2-4db2-ace1-582948d65e40_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_c3ca1147-b348-4716-8762-e3d3a2607781" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_24ec8f93-60a2-4db2-ace1-582948d65e40" xlink:to="loc_us-gaap_EquityComponentDomain_c3ca1147-b348-4716-8762-e3d3a2607781" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParentMember_d193ead8-225f-4cd4-a601-774a99922743" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_c3ca1147-b348-4716-8762-e3d3a2607781" xlink:to="loc_us-gaap_ParentMember_d193ead8-225f-4cd4-a601-774a99922743" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardDateAxis_0cd47664-fd3e-45de-80f2-ef0f672b3603" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_907b7c09-ff00-4294-96d2-9e03c81637d0" xlink:to="loc_us-gaap_AwardDateAxis_0cd47664-fd3e-45de-80f2-ef0f672b3603" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardDateDomain_0cd47664-fd3e-45de-80f2-ef0f672b3603_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardDateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardDateAxis_0cd47664-fd3e-45de-80f2-ef0f672b3603" xlink:to="loc_us-gaap_AwardDateDomain_0cd47664-fd3e-45de-80f2-ef0f672b3603_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardDateDomain_54ae444d-0509-4dbd-aca3-72d00d0aa67c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardDateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardDateAxis_0cd47664-fd3e-45de-80f2-ef0f672b3603" xlink:to="loc_us-gaap_AwardDateDomain_54ae444d-0509-4dbd-aca3-72d00d0aa67c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_AwardYear2023Member_28636204-3817-479b-9105-abe6c9f8c95b" xlink:href="imax-20250331.xsd#imax_AwardYear2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AwardDateDomain_54ae444d-0509-4dbd-aca3-72d00d0aa67c" xlink:to="loc_imax_AwardYear2023Member_28636204-3817-479b-9105-abe6c9f8c95b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_f31139d2-0d37-4627-bf31-99df6a5ccfbc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_us-gaap_ShareBasedCompensation_f31139d2-0d37-4627-bf31-99df6a5ccfbc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_b5c224db-66d3-4619-a971-a1d880850042" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_b5c224db-66d3-4619-a971-a1d880850042" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_ShareBasedCompensationArrangementByShareBasedPaymentAwardTypeOfGrantNumber_5d9adcac-6526-4cba-a7aa-0fe3d73f9994" xlink:href="imax-20250331.xsd#imax_ShareBasedCompensationArrangementByShareBasedPaymentAwardTypeOfGrantNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_imax_ShareBasedCompensationArrangementByShareBasedPaymentAwardTypeOfGrantNumber_5d9adcac-6526-4cba-a7aa-0fe3d73f9994" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_f7f9358e-668a-4640-a0e3-35294de1ead9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_f7f9358e-668a-4640-a0e3-35294de1ead9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_3673f30e-14cc-41b5-aa74-999be3a927fb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_3673f30e-14cc-41b5-aa74-999be3a927fb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedGrantDateFairValueAverageClosingPriceNumberOfDays_655ed5d3-cdd0-44df-92bf-98f55d15b291" xlink:href="imax-20250331.xsd#imax_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedGrantDateFairValueAverageClosingPriceNumberOfDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_imax_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedGrantDateFairValueAverageClosingPriceNumberOfDays_655ed5d3-cdd0-44df-92bf-98f55d15b291" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_89480e5f-ca51-4852-870d-7cbab53689c6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_us-gaap_CommonStockSharesIssued_89480e5f-ca51-4852-870d-7cbab53689c6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramAuthorizedAmount1_5e7b8866-b29f-4f91-a908-ae4ebdfbaa4f" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_srt_StockRepurchaseProgramAuthorizedAmount1_5e7b8866-b29f-4f91-a908-ae4ebdfbaa4f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_fcd2f59a-9be7-4dad-984b-c7bcaf961134" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_fcd2f59a-9be7-4dad-984b-c7bcaf961134" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_0505fc3f-7164-40e8-b518-0204bca7e79c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_0505fc3f-7164-40e8-b518-0204bca7e79c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_eaa7d911-718e-48bd-921b-134079c5b959" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockAcquiredAverageCostPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_eaa7d911-718e-48bd-921b-134079c5b959" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_752ca0d7-f4dd-4389-a7b0-6820503f4526" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_752ca0d7-f4dd-4389-a7b0-6820503f4526" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward_bc005b52-21b2-461f-9754-5b964f7b5f64" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward_bc005b52-21b2-461f-9754-5b964f7b5f64" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_849b9fee-d334-484e-947d-ffbd1270b34e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_849b9fee-d334-484e-947d-ffbd1270b34e" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_StockRepurchaseProgramMaximumPercentageOfSharesAuthorizedToBeRepurchased_87065776-c527-47bd-a296-ae1a40b0d7af" xlink:href="imax-20250331.xsd#imax_StockRepurchaseProgramMaximumPercentageOfSharesAuthorizedToBeRepurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_imax_StockRepurchaseProgramMaximumPercentageOfSharesAuthorizedToBeRepurchased_87065776-c527-47bd-a296-ae1a40b0d7af" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_43945752-b802-4d10-b4bc-1ec636d91fb9" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_srt_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_43945752-b802-4d10-b4bc-1ec636d91fb9" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_f41481ca-b06c-4472-b667-b3e9cfdfab4b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_f41481ca-b06c-4472-b667-b3e9cfdfab4b" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_406f0a09-89a6-4bdb-929a-e16090f81861" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_406f0a09-89a6-4bdb-929a-e16090f81861" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_StatutorySurplusReserveToItsSubsidiariesRegisteredCapitalPercent_20c8946d-cb74-4ef2-9461-af7e785c6027" xlink:href="imax-20250331.xsd#imax_StatutorySurplusReserveToItsSubsidiariesRegisteredCapitalPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3f8531cc-a54c-40b5-9d36-8a6b82148e52" xlink:to="loc_imax_StatutorySurplusReserveToItsSubsidiariesRegisteredCapitalPercent_20c8946d-cb74-4ef2-9461-af7e785c6027" xlink:type="arc" order="18"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/CapitalStockandReservesShareBasedCompensationDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#CapitalStockandReservesShareBasedCompensationDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/CapitalStockandReservesShareBasedCompensationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_a9e6166f-10cc-4edd-a097-cf10f616d98a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_1d50a6d0-d3d9-4808-8fa7-227b810161ec" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_a9e6166f-10cc-4edd-a097-cf10f616d98a" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_1d50a6d0-d3d9-4808-8fa7-227b810161ec" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_6e84a7c6-b3b7-4a86-a984-725cdef41f74" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_1d50a6d0-d3d9-4808-8fa7-227b810161ec" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_6e84a7c6-b3b7-4a86-a984-725cdef41f74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_6e84a7c6-b3b7-4a86-a984-725cdef41f74_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_6e84a7c6-b3b7-4a86-a984-725cdef41f74" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_6e84a7c6-b3b7-4a86-a984-725cdef41f74_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_36e6ada7-ce24-46e9-b76b-d060afd3c3a0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_6e84a7c6-b3b7-4a86-a984-725cdef41f74" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_36e6ada7-ce24-46e9-b76b-d060afd3c3a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_49689e2c-3205-43be-9a1b-47c59ab7746d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_36e6ada7-ce24-46e9-b76b-d060afd3c3a0" xlink:to="loc_us-gaap_CostOfSalesMember_49689e2c-3205-43be-9a1b-47c59ab7746d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_1b932bcc-f097-4b70-aeed-7326f5abe823" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_36e6ada7-ce24-46e9-b76b-d060afd3c3a0" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_1b932bcc-f097-4b70-aeed-7326f5abe823" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_1f135c19-27ad-4d6b-9817-d2ff7020573c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ResearchAndDevelopmentExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_36e6ada7-ce24-46e9-b76b-d060afd3c3a0" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_1f135c19-27ad-4d6b-9817-d2ff7020573c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_90549af8-b771-45fe-afc3-c377b325de75" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_a9e6166f-10cc-4edd-a097-cf10f616d98a" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_90549af8-b771-45fe-afc3-c377b325de75" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/CapitalStockandReservesShareBasedCompensationExpensebyAwardTypeDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#CapitalStockandReservesShareBasedCompensationExpensebyAwardTypeDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/CapitalStockandReservesShareBasedCompensationExpensebyAwardTypeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c31e15bf-37b5-4599-905e-3b19f0f6b5f2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2d46a615-8287-4a7b-9acc-8387eda4c879" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c31e15bf-37b5-4599-905e-3b19f0f6b5f2" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2d46a615-8287-4a7b-9acc-8387eda4c879" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_d5d3bed8-fc41-4bd3-a4d2-2b939edbc616" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2d46a615-8287-4a7b-9acc-8387eda4c879" xlink:to="loc_us-gaap_AwardTypeAxis_d5d3bed8-fc41-4bd3-a4d2-2b939edbc616" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d5d3bed8-fc41-4bd3-a4d2-2b939edbc616_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_d5d3bed8-fc41-4bd3-a4d2-2b939edbc616" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d5d3bed8-fc41-4bd3-a4d2-2b939edbc616_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2ca5a1a9-3439-4fd1-981b-cd714a566b33" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_d5d3bed8-fc41-4bd3-a4d2-2b939edbc616" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2ca5a1a9-3439-4fd1-981b-cd714a566b33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_935a4819-411f-4004-a0ab-ef9437f90b9f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2ca5a1a9-3439-4fd1-981b-cd714a566b33" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_935a4819-411f-4004-a0ab-ef9437f90b9f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_99844d35-d8ba-4029-949b-18d49cc3fea9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2ca5a1a9-3439-4fd1-981b-cd714a566b33" xlink:to="loc_us-gaap_PerformanceSharesMember_99844d35-d8ba-4029-949b-18d49cc3fea9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_IMAXChinaLongTermIncentivePlanRestrictedShareUnitsMember_f23bef6a-1b25-4270-9aed-d193084e51d6" xlink:href="imax-20250331.xsd#imax_IMAXChinaLongTermIncentivePlanRestrictedShareUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2ca5a1a9-3439-4fd1-981b-cd714a566b33" xlink:to="loc_imax_IMAXChinaLongTermIncentivePlanRestrictedShareUnitsMember_f23bef6a-1b25-4270-9aed-d193084e51d6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_IMAXChinaLongTermIncentivePlanPerformanceStockUnitsMember_6c01523d-d6c5-4272-9f04-37df657a27d6" xlink:href="imax-20250331.xsd#imax_IMAXChinaLongTermIncentivePlanPerformanceStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2ca5a1a9-3439-4fd1-981b-cd714a566b33" xlink:to="loc_imax_IMAXChinaLongTermIncentivePlanPerformanceStockUnitsMember_6c01523d-d6c5-4272-9f04-37df657a27d6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_b849935f-304c-46bd-8795-40a80134a4d3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c31e15bf-37b5-4599-905e-3b19f0f6b5f2" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_b849935f-304c-46bd-8795-40a80134a4d3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/CapitalStockandReservesRestrictedStockUnitsActivityDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#CapitalStockandReservesRestrictedStockUnitsActivityDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/CapitalStockandReservesRestrictedStockUnitsActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01393e0c-e981-43b4-8537-f21afdfee09e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b225786f-b111-46d5-b40b-9ade895784d2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01393e0c-e981-43b4-8537-f21afdfee09e" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b225786f-b111-46d5-b40b-9ade895784d2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_ca40ef8f-57b6-4935-8ef4-76307bb44464" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b225786f-b111-46d5-b40b-9ade895784d2" xlink:to="loc_us-gaap_AwardTypeAxis_ca40ef8f-57b6-4935-8ef4-76307bb44464" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ca40ef8f-57b6-4935-8ef4-76307bb44464_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_ca40ef8f-57b6-4935-8ef4-76307bb44464" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ca40ef8f-57b6-4935-8ef4-76307bb44464_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_cdcd3a55-1902-4445-9f5a-49c0408343fc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_ca40ef8f-57b6-4935-8ef4-76307bb44464" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_cdcd3a55-1902-4445-9f5a-49c0408343fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_419ac439-5ead-46c9-bcd7-ca28feee38d6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_cdcd3a55-1902-4445-9f5a-49c0408343fc" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_419ac439-5ead-46c9-bcd7-ca28feee38d6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_6fbe7dc5-8aaa-450c-b2ad-dcc2aa4cf363" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01393e0c-e981-43b4-8537-f21afdfee09e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_6fbe7dc5-8aaa-450c-b2ad-dcc2aa4cf363" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_ce95370f-a8b2-4a47-9e07-34d258110058" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_6fbe7dc5-8aaa-450c-b2ad-dcc2aa4cf363" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_ce95370f-a8b2-4a47-9e07-34d258110058" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_95ab8252-dd82-4d32-921c-e15824fdde28" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_6fbe7dc5-8aaa-450c-b2ad-dcc2aa4cf363" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_95ab8252-dd82-4d32-921c-e15824fdde28" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_f2b5f478-ce10-4f3f-87b1-2c4c202c43a2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_6fbe7dc5-8aaa-450c-b2ad-dcc2aa4cf363" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_f2b5f478-ce10-4f3f-87b1-2c4c202c43a2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_20975c27-71cb-432e-b781-e41392efcb4c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_6fbe7dc5-8aaa-450c-b2ad-dcc2aa4cf363" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_20975c27-71cb-432e-b781-e41392efcb4c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_27563763-a5bc-4a41-9b63-785e15b1ba94" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_f7115130-3737-4c75-9301-dcf9b8c64f10" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01393e0c-e981-43b4-8537-f21afdfee09e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_f7115130-3737-4c75-9301-dcf9b8c64f10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_1e6aadfe-fbd5-4a67-a778-1039cc732db2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_f7115130-3737-4c75-9301-dcf9b8c64f10" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_1e6aadfe-fbd5-4a67-a778-1039cc732db2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_687edb54-9482-41e7-a744-685cf72ad653" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_f7115130-3737-4c75-9301-dcf9b8c64f10" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_687edb54-9482-41e7-a744-685cf72ad653" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_3e5f1310-1a4f-4202-9cdc-c90011e7fb2b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_f7115130-3737-4c75-9301-dcf9b8c64f10" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_3e5f1310-1a4f-4202-9cdc-c90011e7fb2b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_390fa0fc-02c6-403f-9e04-9252085e0299" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_f7115130-3737-4c75-9301-dcf9b8c64f10" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_390fa0fc-02c6-403f-9e04-9252085e0299" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_d3c8b8fc-83f7-4d48-a35c-b4582529da25" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/CapitalStockandReservesPerformanceStockUnitsActivityDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#CapitalStockandReservesPerformanceStockUnitsActivityDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/CapitalStockandReservesPerformanceStockUnitsActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4e909401-a792-4138-aa0f-776e9d08d8b3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b4e835e8-015f-4e9a-9ee6-adfbd1f79d54" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4e909401-a792-4138-aa0f-776e9d08d8b3" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b4e835e8-015f-4e9a-9ee6-adfbd1f79d54" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_4be1d69e-8a92-4eba-a2df-75a9d82318f1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b4e835e8-015f-4e9a-9ee6-adfbd1f79d54" xlink:to="loc_us-gaap_AwardTypeAxis_4be1d69e-8a92-4eba-a2df-75a9d82318f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4be1d69e-8a92-4eba-a2df-75a9d82318f1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_4be1d69e-8a92-4eba-a2df-75a9d82318f1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4be1d69e-8a92-4eba-a2df-75a9d82318f1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f05c0c03-d9e9-4336-b5c1-596141aaefed" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_4be1d69e-8a92-4eba-a2df-75a9d82318f1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f05c0c03-d9e9-4336-b5c1-596141aaefed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_5455f289-3409-41af-9ee9-2953899e9876" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f05c0c03-d9e9-4336-b5c1-596141aaefed" xlink:to="loc_us-gaap_PerformanceSharesMember_5455f289-3409-41af-9ee9-2953899e9876" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TSRPerformanceStockUnitsAwardMember_6a8bf2a6-1d3c-4bea-b39a-bd3dc278a7bd" xlink:href="imax-20250331.xsd#imax_TSRPerformanceStockUnitsAwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f05c0c03-d9e9-4336-b5c1-596141aaefed" xlink:to="loc_imax_TSRPerformanceStockUnitsAwardMember_6a8bf2a6-1d3c-4bea-b39a-bd3dc278a7bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_f0fdf70e-3cf7-4c70-968f-d83b543ed1cc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4e909401-a792-4138-aa0f-776e9d08d8b3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_f0fdf70e-3cf7-4c70-968f-d83b543ed1cc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_dc915c8a-0303-4d6c-b0a8-0b5280acd3da" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_f0fdf70e-3cf7-4c70-968f-d83b543ed1cc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_dc915c8a-0303-4d6c-b0a8-0b5280acd3da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_ade7cae5-ca80-4781-be7e-66f1216f4d6e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_f0fdf70e-3cf7-4c70-968f-d83b543ed1cc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_ade7cae5-ca80-4781-be7e-66f1216f4d6e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_cdb20733-1864-4c18-9a92-02783a6cb65c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_f0fdf70e-3cf7-4c70-968f-d83b543ed1cc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_cdb20733-1864-4c18-9a92-02783a6cb65c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_d526d733-6fc7-46e1-9cbb-29e9baee4f42" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_f0fdf70e-3cf7-4c70-968f-d83b543ed1cc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_d526d733-6fc7-46e1-9cbb-29e9baee4f42" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_1b541103-e243-44db-9ced-30a99341ad6b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_3684ce69-b942-4600-9179-b5f9a68c8979" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4e909401-a792-4138-aa0f-776e9d08d8b3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_3684ce69-b942-4600-9179-b5f9a68c8979" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_fa137cff-3141-4fae-9021-a2150b54a517" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_3684ce69-b942-4600-9179-b5f9a68c8979" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_fa137cff-3141-4fae-9021-a2150b54a517" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_fd600140-1bc4-4c9a-8c24-e8a90df6bcca" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_3684ce69-b942-4600-9179-b5f9a68c8979" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_fd600140-1bc4-4c9a-8c24-e8a90df6bcca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_4b728cc2-7953-4c3d-a258-5e3f250c6208" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_3684ce69-b942-4600-9179-b5f9a68c8979" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_4b728cc2-7953-4c3d-a258-5e3f250c6208" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_0e238109-14db-458d-b140-adefcf646ad7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_3684ce69-b942-4600-9179-b5f9a68c8979" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_0e238109-14db-458d-b140-adefcf646ad7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_7ab25e48-735a-4244-ac5e-11874bcd79f1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalGrantsInPeriod_46832104-5e16-4fc0-84c6-161d77789a77" xlink:href="imax-20250331.xsd#imax_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4e909401-a792-4138-aa0f-776e9d08d8b3" xlink:to="loc_imax_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalGrantsInPeriod_46832104-5e16-4fc0-84c6-161d77789a77" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalGrantsInPeriodWeightedAverageGrantDateFairValue_bcde3a59-6f70-46b1-a186-68d7fdb46427" xlink:href="imax-20250331.xsd#imax_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4e909401-a792-4138-aa0f-776e9d08d8b3" xlink:to="loc_imax_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalGrantsInPeriodWeightedAverageGrantDateFairValue_bcde3a59-6f70-46b1-a186-68d7fdb46427" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_c43f05cb-9325-4e73-b225-9caa04c17c09" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4e909401-a792-4138-aa0f-776e9d08d8b3" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_c43f05cb-9325-4e73-b225-9caa04c17c09" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/RevenuefromContractswithCustomersDisaggregationofRevenuebySegmentDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#RevenuefromContractswithCustomersDisaggregationofRevenuebySegmentDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/RevenuefromContractswithCustomersDisaggregationofRevenuebySegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_6f645cb6-39ed-4a10-9620-d1f234b9fa1d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_65795591-69ba-47a1-b1a0-18edc8f59d4a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_6f645cb6-39ed-4a10-9620-d1f234b9fa1d" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_65795591-69ba-47a1-b1a0-18edc8f59d4a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_bc398510-e13b-4e72-b977-188b9946ef1b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_65795591-69ba-47a1-b1a0-18edc8f59d4a" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_bc398510-e13b-4e72-b977-188b9946ef1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_bc398510-e13b-4e72-b977-188b9946ef1b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_bc398510-e13b-4e72-b977-188b9946ef1b" xlink:to="loc_us-gaap_SegmentDomain_bc398510-e13b-4e72-b977-188b9946ef1b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_f8bf345b-f1ea-4828-9035-1c6fd04fc536" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_bc398510-e13b-4e72-b977-188b9946ef1b" xlink:to="loc_us-gaap_SegmentDomain_f8bf345b-f1ea-4828-9035-1c6fd04fc536" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember_e0169e8b-6fb0-4fa2-ada9-91630ab4b396" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_f8bf345b-f1ea-4828-9035-1c6fd04fc536" xlink:to="loc_us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember_e0169e8b-6fb0-4fa2-ada9-91630ab4b396" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_ContentSolutionsSegmentMember_b3624b75-846d-43b6-91f7-693e356ee94e" xlink:href="imax-20250331.xsd#imax_ContentSolutionsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember_e0169e8b-6fb0-4fa2-ada9-91630ab4b396" xlink:to="loc_imax_ContentSolutionsSegmentMember_b3624b75-846d-43b6-91f7-693e356ee94e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TechnologyProductsAndServicesSegmentMember_8f762af4-b809-4d70-bcb5-8e00bfdabfe9" xlink:href="imax-20250331.xsd#imax_TechnologyProductsAndServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember_e0169e8b-6fb0-4fa2-ada9-91630ab4b396" xlink:to="loc_imax_TechnologyProductsAndServicesSegmentMember_8f762af4-b809-4d70-bcb5-8e00bfdabfe9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllOtherSegmentsMember_70460fdf-c041-4df8-9221-5eaf47bfe6ff" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllOtherSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_f8bf345b-f1ea-4828-9035-1c6fd04fc536" xlink:to="loc_us-gaap_AllOtherSegmentsMember_70460fdf-c041-4df8-9221-5eaf47bfe6ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_41663cf1-8067-4c55-b0bf-61d75a55f98c" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_65795591-69ba-47a1-b1a0-18edc8f59d4a" xlink:to="loc_srt_ProductOrServiceAxis_41663cf1-8067-4c55-b0bf-61d75a55f98c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_41663cf1-8067-4c55-b0bf-61d75a55f98c_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_41663cf1-8067-4c55-b0bf-61d75a55f98c" xlink:to="loc_srt_ProductsAndServicesDomain_41663cf1-8067-4c55-b0bf-61d75a55f98c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_34951d6f-ae69-4d88-ac9d-9aed5bc06280" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_41663cf1-8067-4c55-b0bf-61d75a55f98c" xlink:to="loc_srt_ProductsAndServicesDomain_34951d6f-ae69-4d88-ac9d-9aed5bc06280" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TechnologySalesMember_cdfb9047-c0f8-45ec-8a03-008b620e3b2d" xlink:href="imax-20250331.xsd#imax_TechnologySalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_34951d6f-ae69-4d88-ac9d-9aed5bc06280" xlink:to="loc_imax_TechnologySalesMember_cdfb9047-c0f8-45ec-8a03-008b620e3b2d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_ImageEnhancementAndMaintenanceServicesMember_83781d69-51ec-41a6-8594-c8c30e44b13e" xlink:href="imax-20250331.xsd#imax_ImageEnhancementAndMaintenanceServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_34951d6f-ae69-4d88-ac9d-9aed5bc06280" xlink:to="loc_imax_ImageEnhancementAndMaintenanceServicesMember_83781d69-51ec-41a6-8594-c8c30e44b13e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TechnologyRentalsMember_50971ede-e082-4f70-bfff-5c23967a2e57" xlink:href="imax-20250331.xsd#imax_TechnologyRentalsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_34951d6f-ae69-4d88-ac9d-9aed5bc06280" xlink:to="loc_imax_TechnologyRentalsMember_50971ede-e082-4f70-bfff-5c23967a2e57" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_FinanceIncomeMember_ac7430c4-006e-43a9-9544-2be603d7289f" xlink:href="imax-20250331.xsd#imax_FinanceIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_34951d6f-ae69-4d88-ac9d-9aed5bc06280" xlink:to="loc_imax_FinanceIncomeMember_ac7430c4-006e-43a9-9544-2be603d7289f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsAxis_53a65850-2343-408b-b81c-6ed10885116b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_65795591-69ba-47a1-b1a0-18edc8f59d4a" xlink:to="loc_us-gaap_SubsegmentsAxis_53a65850-2343-408b-b81c-6ed10885116b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsDomain_53a65850-2343-408b-b81c-6ed10885116b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_53a65850-2343-408b-b81c-6ed10885116b" xlink:to="loc_us-gaap_SubsegmentsDomain_53a65850-2343-408b-b81c-6ed10885116b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsDomain_5e6d7785-5700-4ae8-95c0-3870b1c4069c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_53a65850-2343-408b-b81c-6ed10885116b" xlink:to="loc_us-gaap_SubsegmentsDomain_5e6d7785-5700-4ae8-95c0-3870b1c4069c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_FilmRemasteringAndDistributionMember_478b523f-7805-4efd-a19e-f2719cfa719c" xlink:href="imax-20250331.xsd#imax_FilmRemasteringAndDistributionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_5e6d7785-5700-4ae8-95c0-3870b1c4069c" xlink:to="loc_imax_FilmRemasteringAndDistributionMember_478b523f-7805-4efd-a19e-f2719cfa719c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_OtherContentSolutionsMember_626b518e-3d03-4f0a-8dfd-0518738ef7c3" xlink:href="imax-20250331.xsd#imax_OtherContentSolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_5e6d7785-5700-4ae8-95c0-3870b1c4069c" xlink:to="loc_imax_OtherContentSolutionsMember_626b518e-3d03-4f0a-8dfd-0518738ef7c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_SystemSalesMember_197f55db-b4c5-42cf-b837-84d2112f7861" xlink:href="imax-20250331.xsd#imax_SystemSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_5e6d7785-5700-4ae8-95c0-3870b1c4069c" xlink:to="loc_imax_SystemSalesMember_197f55db-b4c5-42cf-b837-84d2112f7861" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_SystemRentalsMember_186c9185-c5a4-4eff-84bf-9ea3716ed819" xlink:href="imax-20250331.xsd#imax_SystemRentalsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_5e6d7785-5700-4ae8-95c0-3870b1c4069c" xlink:to="loc_imax_SystemRentalsMember_186c9185-c5a4-4eff-84bf-9ea3716ed819" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaintenanceMember_f3ac52b7-ceb9-4749-974b-5bbbea86b57c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MaintenanceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_5e6d7785-5700-4ae8-95c0-3870b1c4069c" xlink:to="loc_us-gaap_MaintenanceMember_f3ac52b7-ceb9-4749-974b-5bbbea86b57c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_FinanceIncomeMember_c44f5b74-5e76-4365-a165-830a573802e7" xlink:href="imax-20250331.xsd#imax_FinanceIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_5e6d7785-5700-4ae8-95c0-3870b1c4069c" xlink:to="loc_imax_FinanceIncomeMember_c44f5b74-5e76-4365-a165-830a573802e7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_774bbf9f-57e4-4f90-8044-e5dbcbd6231d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_6f645cb6-39ed-4a10-9620-d1f234b9fa1d" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_774bbf9f-57e4-4f90-8044-e5dbcbd6231d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/RevenuefromContractswithCustomersAdditionalInformationDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#RevenuefromContractswithCustomersAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/RevenuefromContractswithCustomersAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_6c79893a-e452-407b-8b19-1e869c4c0ec7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_fc52c88c-5cd5-41ce-bcfb-4ab1cd565557" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_6c79893a-e452-407b-8b19-1e869c4c0ec7" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_fc52c88c-5cd5-41ce-bcfb-4ab1cd565557" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_4ba7b66f-9851-4a2f-85d1-d045b72edb4f" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_fc52c88c-5cd5-41ce-bcfb-4ab1cd565557" xlink:to="loc_srt_ProductOrServiceAxis_4ba7b66f-9851-4a2f-85d1-d045b72edb4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_4ba7b66f-9851-4a2f-85d1-d045b72edb4f_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_4ba7b66f-9851-4a2f-85d1-d045b72edb4f" xlink:to="loc_srt_ProductsAndServicesDomain_4ba7b66f-9851-4a2f-85d1-d045b72edb4f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_b741e32c-86dd-4253-86e3-efb8f7ffd464" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_4ba7b66f-9851-4a2f-85d1-d045b72edb4f" xlink:to="loc_srt_ProductsAndServicesDomain_b741e32c-86dd-4253-86e3-efb8f7ffd464" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TechnologySalesMember_5f01076a-2402-4a5b-8456-50e5e63b0b60" xlink:href="imax-20250331.xsd#imax_TechnologySalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_b741e32c-86dd-4253-86e3-efb8f7ffd464" xlink:to="loc_imax_TechnologySalesMember_5f01076a-2402-4a5b-8456-50e5e63b0b60" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TechnologyRentalsMember_0483fccc-b621-4720-8467-12ec92694f15" xlink:href="imax-20250331.xsd#imax_TechnologyRentalsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_b741e32c-86dd-4253-86e3-efb8f7ffd464" xlink:to="loc_imax_TechnologyRentalsMember_0483fccc-b621-4720-8467-12ec92694f15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServiceMember_c3605107-ad67-4f1c-9c3f-852279b16c0d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_b741e32c-86dd-4253-86e3-efb8f7ffd464" xlink:to="loc_us-gaap_ServiceMember_c3605107-ad67-4f1c-9c3f-852279b16c0d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditLossStatusAxis_4ad18d78-5ead-4c01-8fac-79a2906e266a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditLossStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_fc52c88c-5cd5-41ce-bcfb-4ab1cd565557" xlink:to="loc_us-gaap_CreditLossStatusAxis_4ad18d78-5ead-4c01-8fac-79a2906e266a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditLossStatusDomain_4ad18d78-5ead-4c01-8fac-79a2906e266a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditLossStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditLossStatusAxis_4ad18d78-5ead-4c01-8fac-79a2906e266a" xlink:to="loc_us-gaap_CreditLossStatusDomain_4ad18d78-5ead-4c01-8fac-79a2906e266a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditLossStatusDomain_2d8caef5-bf4f-44a1-b0e8-0847c579eb5b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditLossStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditLossStatusAxis_4ad18d78-5ead-4c01-8fac-79a2906e266a" xlink:to="loc_us-gaap_CreditLossStatusDomain_2d8caef5-bf4f-44a1-b0e8-0847c579eb5b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_VariableConsiderationReceivablesMember_1e685477-8260-4e14-a582-f5782f2dd423" xlink:href="imax-20250331.xsd#imax_VariableConsiderationReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditLossStatusDomain_2d8caef5-bf4f-44a1-b0e8-0847c579eb5b" xlink:to="loc_imax_VariableConsiderationReceivablesMember_1e685477-8260-4e14-a582-f5782f2dd423" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9f5e49dc-f697-4de5-9808-d8a6701beb4f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_6c79893a-e452-407b-8b19-1e869c4c0ec7" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9f5e49dc-f697-4de5-9808-d8a6701beb4f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_LeaseRevenueNetOfReversal_9f1f7816-588c-4dfd-b3fa-871ea86f60eb" xlink:href="imax-20250331.xsd#imax_LeaseRevenueNetOfReversal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_6c79893a-e452-407b-8b19-1e869c4c0ec7" xlink:to="loc_imax_LeaseRevenueNetOfReversal_9f1f7816-588c-4dfd-b3fa-871ea86f60eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseIncome_88cf25ed-6c83-435f-8336-673539f89f64" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LeaseIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_6c79893a-e452-407b-8b19-1e869c4c0ec7" xlink:to="loc_us-gaap_LeaseIncome_88cf25ed-6c83-435f-8336-673539f89f64" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_38230beb-f8b8-4ffb-8a9c-a18e26ec6b3b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_6c79893a-e452-407b-8b19-1e869c4c0ec7" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_38230beb-f8b8-4ffb-8a9c-a18e26ec6b3b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_6d311954-92c7-46f3-be3d-8dbd1fbb6c1c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_6c79893a-e452-407b-8b19-1e869c4c0ec7" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_6d311954-92c7-46f3-be3d-8dbd1fbb6c1c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_c1b631da-3fae-498a-9b9b-81c37ddab05c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_6c79893a-e452-407b-8b19-1e869c4c0ec7" xlink:to="loc_us-gaap_ContractWithCustomerLiability_c1b631da-3fae-498a-9b9b-81c37ddab05c" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/SegmentReportingAdditionalInformationDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#SegmentReportingAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/SegmentReportingAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_02532f96-8495-4b0b-8a61-a19b4b9d29b8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_73575938-2be4-4c3f-99d8-f88169b0a6d8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_02532f96-8495-4b0b-8a61-a19b4b9d29b8" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_73575938-2be4-4c3f-99d8-f88169b0a6d8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_d7957c86-0350-47dc-8e68-af01b5b57af8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_73575938-2be4-4c3f-99d8-f88169b0a6d8" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_d7957c86-0350-47dc-8e68-af01b5b57af8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_d7957c86-0350-47dc-8e68-af01b5b57af8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_d7957c86-0350-47dc-8e68-af01b5b57af8" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_d7957c86-0350-47dc-8e68-af01b5b57af8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_f9b08941-f87e-440c-afe4-8a8f1cdb0b09" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_d7957c86-0350-47dc-8e68-af01b5b57af8" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_f9b08941-f87e-440c-afe4-8a8f1cdb0b09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_f9ee9e8c-01c6-48f4-968d-ca7b91966c31" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_f9b08941-f87e-440c-afe4-8a8f1cdb0b09" xlink:to="loc_us-gaap_SalesRevenueNetMember_f9ee9e8c-01c6-48f4-968d-ca7b91966c31" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_83dbee7b-c7bc-4aec-a6f3-e1b2c729efdc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_73575938-2be4-4c3f-99d8-f88169b0a6d8" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_83dbee7b-c7bc-4aec-a6f3-e1b2c729efdc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_83dbee7b-c7bc-4aec-a6f3-e1b2c729efdc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_83dbee7b-c7bc-4aec-a6f3-e1b2c729efdc" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_83dbee7b-c7bc-4aec-a6f3-e1b2c729efdc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_cb7393cc-fd30-4141-b672-4598aa94fa7d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_83dbee7b-c7bc-4aec-a6f3-e1b2c729efdc" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_cb7393cc-fd30-4141-b672-4598aa94fa7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicConcentrationRiskMember_71087492-7154-4d79-ba7b-66ce2a214810" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GeographicConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_cb7393cc-fd30-4141-b672-4598aa94fa7d" xlink:to="loc_us-gaap_GeographicConcentrationRiskMember_71087492-7154-4d79-ba7b-66ce2a214810" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_8f00e448-d4cb-4c40-98c3-671163cd0825" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_73575938-2be4-4c3f-99d8-f88169b0a6d8" xlink:to="loc_srt_StatementGeographicalAxis_8f00e448-d4cb-4c40-98c3-671163cd0825" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_8f00e448-d4cb-4c40-98c3-671163cd0825_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_8f00e448-d4cb-4c40-98c3-671163cd0825" xlink:to="loc_srt_SegmentGeographicalDomain_8f00e448-d4cb-4c40-98c3-671163cd0825_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_b2378bdf-6cce-44b5-8c8b-850579085400" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_8f00e448-d4cb-4c40-98c3-671163cd0825" xlink:to="loc_srt_SegmentGeographicalDomain_b2378bdf-6cce-44b5-8c8b-850579085400" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_f67afe31-17c3-41e6-aee2-51da4e3f4886" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_b2378bdf-6cce-44b5-8c8b-850579085400" xlink:to="loc_country_US_f67afe31-17c3-41e6-aee2-51da4e3f4886" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_GreaterChinaMember_5ee5ab78-d4fe-4344-881c-f2dfe7414ac5" xlink:href="imax-20250331.xsd#imax_GreaterChinaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_b2378bdf-6cce-44b5-8c8b-850579085400" xlink:to="loc_imax_GreaterChinaMember_5ee5ab78-d4fe-4344-881c-f2dfe7414ac5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_AsiaExcludingGreaterChinaMember_3e0269bf-c18c-4a8e-afaa-b24000248dba" xlink:href="imax-20250331.xsd#imax_AsiaExcludingGreaterChinaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_b2378bdf-6cce-44b5-8c8b-850579085400" xlink:to="loc_imax_AsiaExcludingGreaterChinaMember_3e0269bf-c18c-4a8e-afaa-b24000248dba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_34f74e99-2c98-426e-bb9c-4dad7f041826" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_02532f96-8495-4b0b-8a61-a19b4b9d29b8" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_34f74e99-2c98-426e-bb9c-4dad7f041826" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/SegmentReportingSegmentReportingInformationbyReportableSegmentDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#SegmentReportingSegmentReportingInformationbyReportableSegmentDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/SegmentReportingSegmentReportingInformationbyReportableSegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_3a505a27-f966-4471-8896-93a1446d034f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_ba369d41-f065-475b-9e4d-48b162533876" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3a505a27-f966-4471-8896-93a1446d034f" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_ba369d41-f065-475b-9e4d-48b162533876" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_6df44fcb-d812-4e6e-802d-8ad523495d82" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_ba369d41-f065-475b-9e4d-48b162533876" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_6df44fcb-d812-4e6e-802d-8ad523495d82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_6df44fcb-d812-4e6e-802d-8ad523495d82_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_6df44fcb-d812-4e6e-802d-8ad523495d82" xlink:to="loc_us-gaap_SegmentDomain_6df44fcb-d812-4e6e-802d-8ad523495d82_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_9ee860d6-2b3e-4127-9466-0a6b1d2844eb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_6df44fcb-d812-4e6e-802d-8ad523495d82" xlink:to="loc_us-gaap_SegmentDomain_9ee860d6-2b3e-4127-9466-0a6b1d2844eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember_2fd1a5ad-198e-4a7d-9b59-d63c24037553" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_9ee860d6-2b3e-4127-9466-0a6b1d2844eb" xlink:to="loc_us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember_2fd1a5ad-198e-4a7d-9b59-d63c24037553" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_ContentSolutionsSegmentMember_7008cf7f-d297-4e53-8a0d-6559e0aace2a" xlink:href="imax-20250331.xsd#imax_ContentSolutionsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember_2fd1a5ad-198e-4a7d-9b59-d63c24037553" xlink:to="loc_imax_ContentSolutionsSegmentMember_7008cf7f-d297-4e53-8a0d-6559e0aace2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TechnologyProductsAndServicesSegmentMember_bd4ee0ff-ebfb-41a2-8f12-6dde8001a36c" xlink:href="imax-20250331.xsd#imax_TechnologyProductsAndServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember_2fd1a5ad-198e-4a7d-9b59-d63c24037553" xlink:to="loc_imax_TechnologyProductsAndServicesSegmentMember_bd4ee0ff-ebfb-41a2-8f12-6dde8001a36c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllOtherSegmentsMember_8300f8fa-72d1-4cf0-be9b-ce47fe94fc15" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllOtherSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_9ee860d6-2b3e-4127-9466-0a6b1d2844eb" xlink:to="loc_us-gaap_AllOtherSegmentsMember_8300f8fa-72d1-4cf0-be9b-ce47fe94fc15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_f2e8997a-3bc0-4a09-b885-52cd4bc15797" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3a505a27-f966-4471-8896-93a1446d034f" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_f2e8997a-3bc0-4a09-b885-52cd4bc15797" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_2b6b880c-8b10-4a54-ade8-bc1fe13b0519" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3a505a27-f966-4471-8896-93a1446d034f" xlink:to="loc_us-gaap_GrossProfit_2b6b880c-8b10-4a54-ade8-bc1fe13b0519" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_PercentageOfRevenuesRepresentedByLargestCustomer_fafdb71a-9114-4aa2-bc31-a19ddd450781" xlink:href="imax-20250331.xsd#imax_PercentageOfRevenuesRepresentedByLargestCustomer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3a505a27-f966-4471-8896-93a1446d034f" xlink:to="loc_imax_PercentageOfRevenuesRepresentedByLargestCustomer_fafdb71a-9114-4aa2-bc31-a19ddd450781" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/SegmentReportingScheduleofCostsandExpensesApplicabletoRevenuesforContentSolutionsDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#SegmentReportingScheduleofCostsandExpensesApplicabletoRevenuesforContentSolutionsDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/SegmentReportingScheduleofCostsandExpensesApplicabletoRevenuesforContentSolutionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_23303a3f-ee22-4ba2-848f-f5bc848efed8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_3fd78bce-07b7-4cdd-bc89-66443dba87a1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_23303a3f-ee22-4ba2-848f-f5bc848efed8" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_3fd78bce-07b7-4cdd-bc89-66443dba87a1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_136a26a0-ebc1-4e40-bfb0-86fbcddabff9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_3fd78bce-07b7-4cdd-bc89-66443dba87a1" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_136a26a0-ebc1-4e40-bfb0-86fbcddabff9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_136a26a0-ebc1-4e40-bfb0-86fbcddabff9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_136a26a0-ebc1-4e40-bfb0-86fbcddabff9" xlink:to="loc_us-gaap_SegmentDomain_136a26a0-ebc1-4e40-bfb0-86fbcddabff9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_a32c8265-b1ac-408b-8b70-a5a43ecd10d8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_136a26a0-ebc1-4e40-bfb0-86fbcddabff9" xlink:to="loc_us-gaap_SegmentDomain_a32c8265-b1ac-408b-8b70-a5a43ecd10d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_ContentSolutionsSegmentMember_595a3d16-e186-4220-8663-04c781ea73eb" xlink:href="imax-20250331.xsd#imax_ContentSolutionsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a32c8265-b1ac-408b-8b70-a5a43ecd10d8" xlink:to="loc_imax_ContentSolutionsSegmentMember_595a3d16-e186-4220-8663-04c781ea73eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_93b81a47-5421-4483-823b-6a411bd8e12d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_23303a3f-ee22-4ba2-848f-f5bc848efed8" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_93b81a47-5421-4483-823b-6a411bd8e12d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FilmMonetizedInFilmGroupAmortizationExpense_8e7f7200-b419-4e8b-9e75-b4771fadd237" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FilmMonetizedInFilmGroupAmortizationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_23303a3f-ee22-4ba2-848f-f5bc848efed8" xlink:to="loc_us-gaap_FilmMonetizedInFilmGroupAmortizationExpense_8e7f7200-b419-4e8b-9e75-b4771fadd237" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_MarketingAndAdvertisingExpenseReversal_f324f05b-e518-4101-a71a-d49a5adbbdbc" xlink:href="imax-20250331.xsd#imax_MarketingAndAdvertisingExpenseReversal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_23303a3f-ee22-4ba2-848f-f5bc848efed8" xlink:to="loc_imax_MarketingAndAdvertisingExpenseReversal_f324f05b-e518-4101-a71a-d49a5adbbdbc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_ExpensesRecoveriesRelatedToCollaborativeArrangements_60e4dd4c-0aad-493b-9992-4f426402d403" xlink:href="imax-20250331.xsd#imax_ExpensesRecoveriesRelatedToCollaborativeArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_23303a3f-ee22-4ba2-848f-f5bc848efed8" xlink:to="loc_imax_ExpensesRecoveriesRelatedToCollaborativeArrangements_60e4dd4c-0aad-493b-9992-4f426402d403" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherExpenses_4f192c84-9271-4067-bd89-3b1fc7467495" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_23303a3f-ee22-4ba2-848f-f5bc848efed8" xlink:to="loc_us-gaap_OtherExpenses_4f192c84-9271-4067-bd89-3b1fc7467495" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_eff2520e-5ad2-4455-ad18-b6f84d36e438" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_23303a3f-ee22-4ba2-848f-f5bc848efed8" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_eff2520e-5ad2-4455-ad18-b6f84d36e438" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_beaac01b-3961-4fa4-ab28-0e6feede2b82" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_23303a3f-ee22-4ba2-848f-f5bc848efed8" xlink:to="loc_us-gaap_GrossProfit_beaac01b-3961-4fa4-ab28-0e6feede2b82" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/SegmentReportingScheduleofCostsandExpensesApplicabletoRevenuesfortheTechnologyProductsandServicesDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#SegmentReportingScheduleofCostsandExpensesApplicabletoRevenuesfortheTechnologyProductsandServicesDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/SegmentReportingScheduleofCostsandExpensesApplicabletoRevenuesfortheTechnologyProductsandServicesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_90fc93b3-4d4d-4f12-bfa3-6ecbfc028165" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_031f3ec6-6c7f-4b38-a064-22e5ac08beca" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_90fc93b3-4d4d-4f12-bfa3-6ecbfc028165" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_031f3ec6-6c7f-4b38-a064-22e5ac08beca" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_0df549be-265c-4e59-bd8d-c004bf6c9502" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_031f3ec6-6c7f-4b38-a064-22e5ac08beca" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_0df549be-265c-4e59-bd8d-c004bf6c9502" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_0df549be-265c-4e59-bd8d-c004bf6c9502_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_0df549be-265c-4e59-bd8d-c004bf6c9502" xlink:to="loc_us-gaap_SegmentDomain_0df549be-265c-4e59-bd8d-c004bf6c9502_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_2c99a763-fe35-4683-8ce7-6950b6b53cb7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_0df549be-265c-4e59-bd8d-c004bf6c9502" xlink:to="loc_us-gaap_SegmentDomain_2c99a763-fe35-4683-8ce7-6950b6b53cb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_TechnologyProductsAndServicesSegmentMember_d92b946c-f2e4-46b9-8ee8-f2a9478a29e8" xlink:href="imax-20250331.xsd#imax_TechnologyProductsAndServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2c99a763-fe35-4683-8ce7-6950b6b53cb7" xlink:to="loc_imax_TechnologyProductsAndServicesSegmentMember_d92b946c-f2e4-46b9-8ee8-f2a9478a29e8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_0414de65-6101-4346-a0c0-a756c5c44550" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_90fc93b3-4d4d-4f12-bfa3-6ecbfc028165" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_0414de65-6101-4346-a0c0-a756c5c44550" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_DepreciationOnEquipmentAssignedToJointRevenueSharingArrangements_f11b6510-51ec-427d-a7a7-1ea093471e34" xlink:href="imax-20250331.xsd#imax_DepreciationOnEquipmentAssignedToJointRevenueSharingArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_90fc93b3-4d4d-4f12-bfa3-6ecbfc028165" xlink:to="loc_imax_DepreciationOnEquipmentAssignedToJointRevenueSharingArrangements_f11b6510-51ec-427d-a7a7-1ea093471e34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSellingAndMarketingExpense_a51055f0-6e56-40fe-a391-87111ec10e92" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherSellingAndMarketingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_90fc93b3-4d4d-4f12-bfa3-6ecbfc028165" xlink:to="loc_us-gaap_OtherSellingAndMarketingExpense_a51055f0-6e56-40fe-a391-87111ec10e92" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_WriteDownOnEquipmentAssignedToJointRevenueSharingArrangements_cc02c79d-94df-49f5-beb2-cb0be9a4b89c" xlink:href="imax-20250331.xsd#imax_WriteDownOnEquipmentAssignedToJointRevenueSharingArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_90fc93b3-4d4d-4f12-bfa3-6ecbfc028165" xlink:to="loc_imax_WriteDownOnEquipmentAssignedToJointRevenueSharingArrangements_cc02c79d-94df-49f5-beb2-cb0be9a4b89c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWriteDown_69ed80a0-0fb0-4025-a2aa-a8a653f00348" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryWriteDown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_90fc93b3-4d4d-4f12-bfa3-6ecbfc028165" xlink:to="loc_us-gaap_InventoryWriteDown_69ed80a0-0fb0-4025-a2aa-a8a653f00348" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherExpenses_59b9c1fd-7293-4b4f-8f46-82fd7fe9d4d6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_90fc93b3-4d4d-4f12-bfa3-6ecbfc028165" xlink:to="loc_us-gaap_OtherExpenses_59b9c1fd-7293-4b4f-8f46-82fd7fe9d4d6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_0f385eb1-8278-4f22-8ee3-f227e8f5c7a7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_90fc93b3-4d4d-4f12-bfa3-6ecbfc028165" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_0f385eb1-8278-4f22-8ee3-f227e8f5c7a7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_1814cef6-f066-47bf-bc4c-3d9d10bc6ede" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_90fc93b3-4d4d-4f12-bfa3-6ecbfc028165" xlink:to="loc_us-gaap_GrossProfit_1814cef6-f066-47bf-bc4c-3d9d10bc6ede" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/SegmentReportingSummaryofRevenuesByGeographicAreaDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#SegmentReportingSummaryofRevenuesByGeographicAreaDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/SegmentReportingSummaryofRevenuesByGeographicAreaDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_8c45ee20-6f11-44d1-848a-57b76852b319" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_192941b0-0964-416f-90e0-752a3365c594" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_8c45ee20-6f11-44d1-848a-57b76852b319" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_192941b0-0964-416f-90e0-752a3365c594" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_d380739a-7b55-4325-a1aa-8d0f635366b6" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_192941b0-0964-416f-90e0-752a3365c594" xlink:to="loc_srt_StatementGeographicalAxis_d380739a-7b55-4325-a1aa-8d0f635366b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_d380739a-7b55-4325-a1aa-8d0f635366b6_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_d380739a-7b55-4325-a1aa-8d0f635366b6" xlink:to="loc_srt_SegmentGeographicalDomain_d380739a-7b55-4325-a1aa-8d0f635366b6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_723515fa-4f39-4b1d-aad9-468b05f2a1a0" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_d380739a-7b55-4325-a1aa-8d0f635366b6" xlink:to="loc_srt_SegmentGeographicalDomain_723515fa-4f39-4b1d-aad9-468b05f2a1a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_c1e97f67-78c8-4751-8907-40e62f8c68e9" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_723515fa-4f39-4b1d-aad9-468b05f2a1a0" xlink:to="loc_country_US_c1e97f67-78c8-4751-8907-40e62f8c68e9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_GreaterChinaMember_7b5e897f-35d8-4154-bd5b-17d2398bd045" xlink:href="imax-20250331.xsd#imax_GreaterChinaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_723515fa-4f39-4b1d-aad9-468b05f2a1a0" xlink:to="loc_imax_GreaterChinaMember_7b5e897f-35d8-4154-bd5b-17d2398bd045" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_AsiaExcludingGreaterChinaMember_7e730f2b-6263-4194-8b7f-7e078f701c17" xlink:href="imax-20250331.xsd#imax_AsiaExcludingGreaterChinaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_723515fa-4f39-4b1d-aad9-468b05f2a1a0" xlink:to="loc_imax_AsiaExcludingGreaterChinaMember_7e730f2b-6263-4194-8b7f-7e078f701c17" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_WesternEuropeMember_ef156341-30c1-49a6-844c-d79d5bdb529a" xlink:href="imax-20250331.xsd#imax_WesternEuropeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_723515fa-4f39-4b1d-aad9-468b05f2a1a0" xlink:to="loc_imax_WesternEuropeMember_ef156341-30c1-49a6-844c-d79d5bdb529a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LatinAmericaMember_8511862a-c2be-4cf8-8019-262397c7e2d9" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_LatinAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_723515fa-4f39-4b1d-aad9-468b05f2a1a0" xlink:to="loc_srt_LatinAmericaMember_8511862a-c2be-4cf8-8019-262397c7e2d9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CA_b2eb45c8-6d0c-4429-a186-d79ebfa5fd95" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_723515fa-4f39-4b1d-aad9-468b05f2a1a0" xlink:to="loc_country_CA_b2eb45c8-6d0c-4429-a186-d79ebfa5fd95" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_RestOfWorldMember_54706914-2ccc-465f-b1b5-8669d54aeebe" xlink:href="imax-20250331.xsd#imax_RestOfWorldMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_723515fa-4f39-4b1d-aad9-468b05f2a1a0" xlink:to="loc_imax_RestOfWorldMember_54706914-2ccc-465f-b1b5-8669d54aeebe" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_a4c51e8a-2c47-4507-852e-98f4262f3dc9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_8c45ee20-6f11-44d1-848a-57b76852b319" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_a4c51e8a-2c47-4507-852e-98f4262f3dc9" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/EmployeesPensionandPostretirementBenefitsDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#EmployeesPensionandPostretirementBenefitsDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/EmployeesPensionandPostretirementBenefitsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9b8238c1-7417-4da5-bbb3-36031095b244" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_d1a345b7-0eab-49ae-9a49-d066cf954c50" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9b8238c1-7417-4da5-bbb3-36031095b244" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_d1a345b7-0eab-49ae-9a49-d066cf954c50" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_bfa95b8d-e77c-4207-afdb-54986ea2ee11" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_d1a345b7-0eab-49ae-9a49-d066cf954c50" xlink:to="loc_srt_TitleOfIndividualAxis_bfa95b8d-e77c-4207-afdb-54986ea2ee11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_bfa95b8d-e77c-4207-afdb-54986ea2ee11_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_bfa95b8d-e77c-4207-afdb-54986ea2ee11" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_bfa95b8d-e77c-4207-afdb-54986ea2ee11_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_d5c46fcd-af32-40d2-aa44-307b80785c71" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_bfa95b8d-e77c-4207-afdb-54986ea2ee11" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_d5c46fcd-af32-40d2-aa44-307b80785c71" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ChiefExecutiveOfficerMember_e7918f7c-f17d-44fa-87b3-10c58dba4088" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ChiefExecutiveOfficerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_d5c46fcd-af32-40d2-aa44-307b80785c71" xlink:to="loc_srt_ChiefExecutiveOfficerMember_e7918f7c-f17d-44fa-87b3-10c58dba4088" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_d0bad51c-e90d-499d-9870-2cd067807b77" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_d1a345b7-0eab-49ae-9a49-d066cf954c50" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_d0bad51c-e90d-499d-9870-2cd067807b77" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_d0bad51c-e90d-499d-9870-2cd067807b77_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_d0bad51c-e90d-499d-9870-2cd067807b77" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_d0bad51c-e90d-499d-9870-2cd067807b77_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_e04ac5dd-83bd-4df2-97c4-054be9d0ad36" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_d0bad51c-e90d-499d-9870-2cd067807b77" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_e04ac5dd-83bd-4df2-97c4-054be9d0ad36" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_25c9d623-61bc-4b86-b67c-9fad05d92993" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_e04ac5dd-83bd-4df2-97c4-054be9d0ad36" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_25c9d623-61bc-4b86-b67c-9fad05d92993" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_DefinedContributionPensionPlanMember_0f78d27c-b3cb-4716-a266-0f485b9925a8" xlink:href="imax-20250331.xsd#imax_DefinedContributionPensionPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_e04ac5dd-83bd-4df2-97c4-054be9d0ad36" xlink:to="loc_imax_DefinedContributionPensionPlanMember_0f78d27c-b3cb-4716-a266-0f485b9925a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_CanadianPlanMember_0152017b-4904-4bf9-a28e-9b626462cc52" xlink:href="imax-20250331.xsd#imax_CanadianPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_e04ac5dd-83bd-4df2-97c4-054be9d0ad36" xlink:to="loc_imax_CanadianPlanMember_0152017b-4904-4bf9-a28e-9b626462cc52" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_UsInternalRevenueCodeMember_b53a9dfc-3ce6-4fe8-864a-15063abc2b58" xlink:href="imax-20250331.xsd#imax_UsInternalRevenueCodeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_e04ac5dd-83bd-4df2-97c4-054be9d0ad36" xlink:to="loc_imax_UsInternalRevenueCodeMember_b53a9dfc-3ce6-4fe8-864a-15063abc2b58" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_4cbe2d8c-4296-4efd-a2ed-1e086aa3ac6c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_e04ac5dd-83bd-4df2-97c4-054be9d0ad36" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_4cbe2d8c-4296-4efd-a2ed-1e086aa3ac6c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember_93da1362-b28b-4e3b-aad5-5a0bb8af6776" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_e04ac5dd-83bd-4df2-97c4-054be9d0ad36" xlink:to="loc_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember_93da1362-b28b-4e3b-aad5-5a0bb8af6776" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_114e7007-372c-4fed-a735-1bdcc2fea368" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_d1a345b7-0eab-49ae-9a49-d066cf954c50" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_114e7007-372c-4fed-a735-1bdcc2fea368" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_114e7007-372c-4fed-a735-1bdcc2fea368_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_114e7007-372c-4fed-a735-1bdcc2fea368" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_114e7007-372c-4fed-a735-1bdcc2fea368_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_0adc13fb-4167-4487-8f44-650863441c98" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_114e7007-372c-4fed-a735-1bdcc2fea368" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_0adc13fb-4167-4487-8f44-650863441c98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_AccruedAndOtherLiabilitiesMember_a16365ec-dcce-4843-9d52-9ff19be0d440" xlink:href="imax-20250331.xsd#imax_AccruedAndOtherLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_0adc13fb-4167-4487-8f44-650863441c98" xlink:to="loc_imax_AccruedAndOtherLiabilitiesMember_a16365ec-dcce-4843-9d52-9ff19be0d440" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_PrepaidExpensesMember_2165ca73-de99-4199-bc55-c6be632786a2" xlink:href="imax-20250331.xsd#imax_PrepaidExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_0adc13fb-4167-4487-8f44-650863441c98" xlink:to="loc_imax_PrepaidExpensesMember_2165ca73-de99-4199-bc55-c6be632786a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_faab6c75-5ca4-45ee-bb22-3112ff0b432b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_d1a345b7-0eab-49ae-9a49-d066cf954c50" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_faab6c75-5ca4-45ee-bb22-3112ff0b432b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_faab6c75-5ca4-45ee-bb22-3112ff0b432b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_faab6c75-5ca4-45ee-bb22-3112ff0b432b" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_faab6c75-5ca4-45ee-bb22-3112ff0b432b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_1c9a2a5a-0e20-4e52-9ee8-575cf0afd588" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_faab6c75-5ca4-45ee-bb22-3112ff0b432b" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_1c9a2a5a-0e20-4e52-9ee8-575cf0afd588" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationExcludingShareBasedPaymentsAndRetirementBenefitsMember_9a53c53f-019b-428c-9564-48b750f6ade1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredCompensationExcludingShareBasedPaymentsAndRetirementBenefitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_1c9a2a5a-0e20-4e52-9ee8-575cf0afd588" xlink:to="loc_us-gaap_DeferredCompensationExcludingShareBasedPaymentsAndRetirementBenefitsMember_9a53c53f-019b-428c-9564-48b750f6ade1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanSpecialTerminationBenefits_96b71dda-d615-4135-a3fa-b822b44b17ad" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanSpecialTerminationBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9b8238c1-7417-4da5-bbb3-36031095b244" xlink:to="loc_us-gaap_DefinedBenefitPlanSpecialTerminationBenefits_96b71dda-d615-4135-a3fa-b822b44b17ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_6edf1256-249c-41a0-9751-1dc36c011f70" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanBenefitObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9b8238c1-7417-4da5-bbb3-36031095b244" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_6edf1256-249c-41a0-9751-1dc36c011f70" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_6a601519-e517-41dc-81e5-62b50a0ede13" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9b8238c1-7417-4da5-bbb3-36031095b244" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_6a601519-e517-41dc-81e5-62b50a0ede13" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_DefinedBenefitPlanAdditionalInterestCostInRemainderOfTheYear_7977e7b0-daab-468c-8a4a-5ebe1f7e0c1b" xlink:href="imax-20250331.xsd#imax_DefinedBenefitPlanAdditionalInterestCostInRemainderOfTheYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9b8238c1-7417-4da5-bbb3-36031095b244" xlink:to="loc_imax_DefinedBenefitPlanAdditionalInterestCostInRemainderOfTheYear_7977e7b0-daab-468c-8a4a-5ebe1f7e0c1b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear_ed65cf40-fa38-4cee-98d9-21a814d4ceed" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9b8238c1-7417-4da5-bbb3-36031095b244" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear_ed65cf40-fa38-4cee-98d9-21a814d4ceed" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_MaximumPercentageOfBaseSalaryContributedToPensionPlanByCompany_3f83afd6-615e-4342-8da4-b25cdc287ae2" xlink:href="imax-20250331.xsd#imax_MaximumPercentageOfBaseSalaryContributedToPensionPlanByCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9b8238c1-7417-4da5-bbb3-36031095b244" xlink:to="loc_imax_MaximumPercentageOfBaseSalaryContributedToPensionPlanByCompany_3f83afd6-615e-4342-8da4-b25cdc287ae2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_ee2f96bd-be2f-4c1c-97e9-2a6aef4773a1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedContributionPlanCostRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9b8238c1-7417-4da5-bbb3-36031095b244" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_ee2f96bd-be2f-4c1c-97e9-2a6aef4773a1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PostemploymentBenefitsPeriodExpense_77b628a8-10f2-4bc2-9efc-094ebf54d055" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PostemploymentBenefitsPeriodExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9b8238c1-7417-4da5-bbb3-36031095b244" xlink:to="loc_us-gaap_PostemploymentBenefitsPeriodExpense_77b628a8-10f2-4bc2-9efc-094ebf54d055" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_1b25c5d5-fa67-48cd-a971-0923093e94dc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9b8238c1-7417-4da5-bbb3-36031095b244" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_1b25c5d5-fa67-48cd-a971-0923093e94dc" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_CompanyOwnedLifeInsurance_29018d2f-6430-46d2-bdc7-cd1f9fa1361e" xlink:href="imax-20250331.xsd#imax_CompanyOwnedLifeInsurance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9b8238c1-7417-4da5-bbb3-36031095b244" xlink:to="loc_imax_CompanyOwnedLifeInsurance_29018d2f-6430-46d2-bdc7-cd1f9fa1361e" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/FinancialInstrumentsAdditionalInformationDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#FinancialInstrumentsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/FinancialInstrumentsAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_c46452b3-d211-45b2-a559-f95c9bfdb528" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_809a1d70-dbdf-4816-a379-c67fc0679c30" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_c46452b3-d211-45b2-a559-f95c9bfdb528" xlink:to="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_809a1d70-dbdf-4816-a379-c67fc0679c30" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_e15d7856-41fd-48e8-986b-e8d91cc2fe5d" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_809a1d70-dbdf-4816-a379-c67fc0679c30" xlink:to="loc_srt_StatementGeographicalAxis_e15d7856-41fd-48e8-986b-e8d91cc2fe5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_e15d7856-41fd-48e8-986b-e8d91cc2fe5d_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_e15d7856-41fd-48e8-986b-e8d91cc2fe5d" xlink:to="loc_srt_SegmentGeographicalDomain_e15d7856-41fd-48e8-986b-e8d91cc2fe5d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_8fe82699-3752-4b63-81ed-1f9d40bf3426" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_e15d7856-41fd-48e8-986b-e8d91cc2fe5d" xlink:to="loc_srt_SegmentGeographicalDomain_8fe82699-3752-4b63-81ed-1f9d40bf3426" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CN_7a46bfc5-37b8-431c-9b1d-2705d9edaf47" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_CN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_8fe82699-3752-4b63-81ed-1f9d40bf3426" xlink:to="loc_country_CN_7a46bfc5-37b8-431c-9b1d-2705d9edaf47" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_45ae5fe3-2601-48e0-85db-ca50d899175a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_809a1d70-dbdf-4816-a379-c67fc0679c30" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_45ae5fe3-2601-48e0-85db-ca50d899175a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_45ae5fe3-2601-48e0-85db-ca50d899175a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_45ae5fe3-2601-48e0-85db-ca50d899175a" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_45ae5fe3-2601-48e0-85db-ca50d899175a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_54598981-34ab-4783-8eab-2cfb3aeccda3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_45ae5fe3-2601-48e0-85db-ca50d899175a" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_54598981-34ab-4783-8eab-2cfb3aeccda3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMember_1f97c422-0827-4cc6-ba21-9a66204f4f86" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_54598981-34ab-4783-8eab-2cfb3aeccda3" xlink:to="loc_us-gaap_OtherAssetsMember_1f97c422-0827-4cc6-ba21-9a66204f4f86" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_9a14f7dc-376d-4311-a0a6-044cabaac4e8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_809a1d70-dbdf-4816-a379-c67fc0679c30" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_9a14f7dc-376d-4311-a0a6-044cabaac4e8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_9a14f7dc-376d-4311-a0a6-044cabaac4e8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_9a14f7dc-376d-4311-a0a6-044cabaac4e8" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_9a14f7dc-376d-4311-a0a6-044cabaac4e8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_1d456967-088e-4566-809f-308184ed2eb9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_9a14f7dc-376d-4311-a0a6-044cabaac4e8" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_1d456967-088e-4566-809f-308184ed2eb9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_507f61a2-95a5-40e1-8798-afb6f7943896" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_1d456967-088e-4566-809f-308184ed2eb9" xlink:to="loc_us-gaap_ForeignExchangeContractMember_507f61a2-95a5-40e1-8798-afb6f7943896" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_cb665b6c-8347-45f9-97bd-0edfd1099d82" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_809a1d70-dbdf-4816-a379-c67fc0679c30" xlink:to="loc_us-gaap_HedgingDesignationAxis_cb665b6c-8347-45f9-97bd-0edfd1099d82" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_cb665b6c-8347-45f9-97bd-0edfd1099d82_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_cb665b6c-8347-45f9-97bd-0edfd1099d82" xlink:to="loc_us-gaap_HedgingDesignationDomain_cb665b6c-8347-45f9-97bd-0edfd1099d82_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_7a343733-b142-4f0b-bb6e-25eafee5c191" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_cb665b6c-8347-45f9-97bd-0edfd1099d82" xlink:to="loc_us-gaap_HedgingDesignationDomain_7a343733-b142-4f0b-bb6e-25eafee5c191" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_60131b34-6e78-4ccd-9897-b7d8d135a018" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_7a343733-b142-4f0b-bb6e-25eafee5c191" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_60131b34-6e78-4ccd-9897-b7d8d135a018" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_ad47ab04-ad13-4416-a256-290107987c91" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_c46452b3-d211-45b2-a559-f95c9bfdb528" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_ad47ab04-ad13-4416-a256-290107987c91" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_CashHeldOrUndistributedEarningsOfForeignSubsidiary_ec2f5dab-733c-4b20-8bdd-ac33c8d3f869" xlink:href="imax-20250331.xsd#imax_CashHeldOrUndistributedEarningsOfForeignSubsidiary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_c46452b3-d211-45b2-a559-f95c9bfdb528" xlink:to="loc_imax_CashHeldOrUndistributedEarningsOfForeignSubsidiary_ec2f5dab-733c-4b20-8bdd-ac33c8d3f869" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_CashHeldOrUndistributedEarningsOfForeignSubsidiaries_3f5d26b4-9b3b-45cb-98dd-f158e0be3674" xlink:href="imax-20250331.xsd#imax_CashHeldOrUndistributedEarningsOfForeignSubsidiaries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_c46452b3-d211-45b2-a559-f95c9bfdb528" xlink:to="loc_imax_CashHeldOrUndistributedEarningsOfForeignSubsidiaries_3f5d26b4-9b3b-45cb-98dd-f158e0be3674" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_NumberOfCountriesThatGenerateBoxOffice_234637e1-6483-4a2b-be87-9704fecf683a" xlink:href="imax-20250331.xsd#imax_NumberOfCountriesThatGenerateBoxOffice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_c46452b3-d211-45b2-a559-f95c9bfdb528" xlink:to="loc_imax_NumberOfCountriesThatGenerateBoxOffice_234637e1-6483-4a2b-be87-9704fecf683a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_c6d257cd-bad3-498c-931e-e753c6997db3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_c46452b3-d211-45b2-a559-f95c9bfdb528" xlink:to="loc_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_c6d257cd-bad3-498c-931e-e753c6997db3" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/FinancialInstrumentsFairValueofFinancialInstrumentsDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#FinancialInstrumentsFairValueofFinancialInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/FinancialInstrumentsFairValueofFinancialInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_56c9245a-f67d-4f05-88c3-2baecd855aa7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_c9778b86-793e-4015-9386-6d2bea17f12f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_56c9245a-f67d-4f05-88c3-2baecd855aa7" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_c9778b86-793e-4015-9386-6d2bea17f12f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_a88c26f7-aa8a-4a42-a114-a1d46c078657" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_c9778b86-793e-4015-9386-6d2bea17f12f" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_a88c26f7-aa8a-4a42-a114-a1d46c078657" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_a88c26f7-aa8a-4a42-a114-a1d46c078657_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_a88c26f7-aa8a-4a42-a114-a1d46c078657" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_a88c26f7-aa8a-4a42-a114-a1d46c078657_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_0843de4f-543d-47c7-9451-3395bfe6743a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_a88c26f7-aa8a-4a42-a114-a1d46c078657" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_0843de4f-543d-47c7-9451-3395bfe6743a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_0a1b6655-5584-4895-8abc-64b47600492a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_0843de4f-543d-47c7-9451-3395bfe6743a" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_0a1b6655-5584-4895-8abc-64b47600492a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_10035dd5-2f94-43d0-9e89-91c5bb5f5dee" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_0a1b6655-5584-4895-8abc-64b47600492a" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_10035dd5-2f94-43d0-9e89-91c5bb5f5dee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_343db3aa-7ac8-43fc-8bde-c3b413fae6c9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_0a1b6655-5584-4895-8abc-64b47600492a" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_343db3aa-7ac8-43fc-8bde-c3b413fae6c9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8ed12dcb-a359-4a28-9097-f5d2d24caef0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_c9778b86-793e-4015-9386-6d2bea17f12f" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8ed12dcb-a359-4a28-9097-f5d2d24caef0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8ed12dcb-a359-4a28-9097-f5d2d24caef0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8ed12dcb-a359-4a28-9097-f5d2d24caef0" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8ed12dcb-a359-4a28-9097-f5d2d24caef0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_06851211-2970-491d-82f6-c5e55635eb8d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8ed12dcb-a359-4a28-9097-f5d2d24caef0" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_06851211-2970-491d-82f6-c5e55635eb8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_8c3b7005-d1bf-4f52-888f-696389f8abcf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_06851211-2970-491d-82f6-c5e55635eb8d" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_8c3b7005-d1bf-4f52-888f-696389f8abcf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_96b484a6-fa0d-4fff-8baf-194b15bdada7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_06851211-2970-491d-82f6-c5e55635eb8d" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_96b484a6-fa0d-4fff-8baf-194b15bdada7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_0d94a1ce-171d-4668-9964-6f05e6e3a7af" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_c9778b86-793e-4015-9386-6d2bea17f12f" xlink:to="loc_us-gaap_HedgingDesignationAxis_0d94a1ce-171d-4668-9964-6f05e6e3a7af" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_0d94a1ce-171d-4668-9964-6f05e6e3a7af_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_0d94a1ce-171d-4668-9964-6f05e6e3a7af" xlink:to="loc_us-gaap_HedgingDesignationDomain_0d94a1ce-171d-4668-9964-6f05e6e3a7af_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_568e13f6-9ac9-470b-998d-4919d2e28d14" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_0d94a1ce-171d-4668-9964-6f05e6e3a7af" xlink:to="loc_us-gaap_HedgingDesignationDomain_568e13f6-9ac9-470b-998d-4919d2e28d14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_b8ce1d31-d452-4fd2-bec1-8c5972be953d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_568e13f6-9ac9-470b-998d-4919d2e28d14" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_b8ce1d31-d452-4fd2-bec1-8c5972be953d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_a3cfae84-02ff-41eb-8b22-994c7ce8c8ef" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_c9778b86-793e-4015-9386-6d2bea17f12f" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_a3cfae84-02ff-41eb-8b22-994c7ce8c8ef" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_a3cfae84-02ff-41eb-8b22-994c7ce8c8ef_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityLenderDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_a3cfae84-02ff-41eb-8b22-994c7ce8c8ef" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_a3cfae84-02ff-41eb-8b22-994c7ce8c8ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_07f6b26d-ced9-4587-9739-1879b2212aab" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityLenderDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_a3cfae84-02ff-41eb-8b22-994c7ce8c8ef" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_07f6b26d-ced9-4587-9739-1879b2212aab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_WellsFargoCreditFacilityMember_e9d85b01-e9cb-4fd0-a462-69dfff96e114" xlink:href="imax-20250331.xsd#imax_WellsFargoCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_07f6b26d-ced9-4587-9739-1879b2212aab" xlink:to="loc_imax_WellsFargoCreditFacilityMember_e9d85b01-e9cb-4fd0-a462-69dfff96e114" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_7d523eae-481a-407c-858e-4ef6bd98e861" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_56c9245a-f67d-4f05-88c3-2baecd855aa7" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_7d523eae-481a-407c-858e-4ef6bd98e861" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_NetFinancedSalesReceivables_a15439ab-6a2b-484d-8e2e-5d17e950fd85" xlink:href="imax-20250331.xsd#imax_NetFinancedSalesReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_56c9245a-f67d-4f05-88c3-2baecd855aa7" xlink:to="loc_imax_NetFinancedSalesReceivables_a15439ab-6a2b-484d-8e2e-5d17e950fd85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLoss_b103ec34-4615-4a00-939b-858def7485c6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_56c9245a-f67d-4f05-88c3-2baecd855aa7" xlink:to="loc_us-gaap_SalesTypeLeaseNetInvestmentInLeaseAfterAllowanceForCreditLoss_b103ec34-4615-4a00-939b-858def7485c6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_CompanyOwnedLifeInsurance_86d92fdd-44b4-47de-847b-30b926ef6592" xlink:href="imax-20250331.xsd#imax_CompanyOwnedLifeInsurance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_56c9245a-f67d-4f05-88c3-2baecd855aa7" xlink:to="loc_imax_CompanyOwnedLifeInsurance_86d92fdd-44b4-47de-847b-30b926ef6592" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeNet_444a59ad-1b26-4969-bf66-fd6ab3d2fcae" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeFairValueOfDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_56c9245a-f67d-4f05-88c3-2baecd855aa7" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeNet_444a59ad-1b26-4969-bf66-fd6ab3d2fcae" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_462de1aa-f349-4002-b2ba-f7e46587d8bf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_56c9245a-f67d-4f05-88c3-2baecd855aa7" xlink:to="loc_us-gaap_LineOfCredit_462de1aa-f349-4002-b2ba-f7e46587d8bf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleNotesPayable_6f2e86af-9666-49da-93d3-a0e1497b3776" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConvertibleNotesPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_56c9245a-f67d-4f05-88c3-2baecd855aa7" xlink:to="loc_us-gaap_ConvertibleNotesPayable_6f2e86af-9666-49da-93d3-a0e1497b3776" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/FinancialInstrumentsNotionalvalueofForeignExchangeContractsDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#FinancialInstrumentsNotionalvalueofForeignExchangeContractsDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/FinancialInstrumentsNotionalvalueofForeignExchangeContractsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_a2abcdeb-0637-4fa4-af66-dbd9bedfce09" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_00cd063e-abbd-4ce5-8d7d-3d4796e7cf83" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_a2abcdeb-0637-4fa4-af66-dbd9bedfce09" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_00cd063e-abbd-4ce5-8d7d-3d4796e7cf83" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_7a9820a3-105c-4aba-ac57-163391722deb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_00cd063e-abbd-4ce5-8d7d-3d4796e7cf83" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_7a9820a3-105c-4aba-ac57-163391722deb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_7a9820a3-105c-4aba-ac57-163391722deb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_7a9820a3-105c-4aba-ac57-163391722deb" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_7a9820a3-105c-4aba-ac57-163391722deb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_d5875bc7-bcd6-452e-a73d-08eb95aab400" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_7a9820a3-105c-4aba-ac57-163391722deb" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_d5875bc7-bcd6-452e-a73d-08eb95aab400" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_ce225657-7345-4f45-bd70-e0c54b9b21e2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_d5875bc7-bcd6-452e-a73d-08eb95aab400" xlink:to="loc_us-gaap_ForeignExchangeContractMember_ce225657-7345-4f45-bd70-e0c54b9b21e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_32ddfbe9-7db7-4fae-ba14-cfb203df81d3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_00cd063e-abbd-4ce5-8d7d-3d4796e7cf83" xlink:to="loc_us-gaap_HedgingDesignationAxis_32ddfbe9-7db7-4fae-ba14-cfb203df81d3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_32ddfbe9-7db7-4fae-ba14-cfb203df81d3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_32ddfbe9-7db7-4fae-ba14-cfb203df81d3" xlink:to="loc_us-gaap_HedgingDesignationDomain_32ddfbe9-7db7-4fae-ba14-cfb203df81d3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_e635f68f-29ac-4751-8432-a3d7458a5550" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_32ddfbe9-7db7-4fae-ba14-cfb203df81d3" xlink:to="loc_us-gaap_HedgingDesignationDomain_e635f68f-29ac-4751-8432-a3d7458a5550" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_469d8eb0-e84f-433b-9b50-c02ec9204fb0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_e635f68f-29ac-4751-8432-a3d7458a5550" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_469d8eb0-e84f-433b-9b50-c02ec9204fb0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetNotionalAmount_497d7492-1e95-4f28-9610-667811b94a2e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeAssetNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_a2abcdeb-0637-4fa4-af66-dbd9bedfce09" xlink:to="loc_us-gaap_DerivativeAssetNotionalAmount_497d7492-1e95-4f28-9610-667811b94a2e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/FinancialInstrumentsFairValueofForeignExchangeContractsDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#FinancialInstrumentsFairValueofForeignExchangeContractsDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/FinancialInstrumentsFairValueofForeignExchangeContractsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_a97883ef-c3c2-4aca-9bc2-77872b81b432" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_9f5228ae-fe89-4aed-ba4f-80496c09d467" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_a97883ef-c3c2-4aca-9bc2-77872b81b432" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_9f5228ae-fe89-4aed-ba4f-80496c09d467" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_c43a4fcc-1f2b-4c12-8529-a366129a5266" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_9f5228ae-fe89-4aed-ba4f-80496c09d467" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_c43a4fcc-1f2b-4c12-8529-a366129a5266" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_c43a4fcc-1f2b-4c12-8529-a366129a5266_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_c43a4fcc-1f2b-4c12-8529-a366129a5266" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_c43a4fcc-1f2b-4c12-8529-a366129a5266_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_4d0d3223-2730-41e8-addd-263fa0cb2b7a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_c43a4fcc-1f2b-4c12-8529-a366129a5266" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_4d0d3223-2730-41e8-addd-263fa0cb2b7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMember_1451f62c-1726-4c66-a878-96e3f837be81" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_4d0d3223-2730-41e8-addd-263fa0cb2b7a" xlink:to="loc_us-gaap_OtherAssetsMember_1451f62c-1726-4c66-a878-96e3f837be81" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesMember_35271f13-8598-4f46-b84a-429e837f7fe3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_4d0d3223-2730-41e8-addd-263fa0cb2b7a" xlink:to="loc_us-gaap_AccruedLiabilitiesMember_35271f13-8598-4f46-b84a-429e837f7fe3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_5bd9a681-e57a-4b40-99f0-fd903cfbfcee" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_9f5228ae-fe89-4aed-ba4f-80496c09d467" xlink:to="loc_us-gaap_HedgingDesignationAxis_5bd9a681-e57a-4b40-99f0-fd903cfbfcee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_5bd9a681-e57a-4b40-99f0-fd903cfbfcee_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_5bd9a681-e57a-4b40-99f0-fd903cfbfcee" xlink:to="loc_us-gaap_HedgingDesignationDomain_5bd9a681-e57a-4b40-99f0-fd903cfbfcee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_e30aeb2f-f154-4e40-94b5-f04f191ac10a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_5bd9a681-e57a-4b40-99f0-fd903cfbfcee" xlink:to="loc_us-gaap_HedgingDesignationDomain_e30aeb2f-f154-4e40-94b5-f04f191ac10a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_38dfa629-70fa-4de4-b008-baab29710aaf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_e30aeb2f-f154-4e40-94b5-f04f191ac10a" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_38dfa629-70fa-4de4-b008-baab29710aaf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_ec39d736-8cf4-4e96-8a83-7821fff2e608" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_a97883ef-c3c2-4aca-9bc2-77872b81b432" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_ec39d736-8cf4-4e96-8a83-7821fff2e608" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral_f86e4c44-fede-4b83-8981-b6c29094c690" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_a97883ef-c3c2-4aca-9bc2-77872b81b432" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral_f86e4c44-fede-4b83-8981-b6c29094c690" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeNet_e24681d0-b521-44a1-bef6-0be70e53c2a1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeFairValueOfDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_a97883ef-c3c2-4aca-9bc2-77872b81b432" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeNet_e24681d0-b521-44a1-bef6-0be70e53c2a1" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/FinancialInstrumentsDerivativesinForeignCurrencyHedgingRelationshipsDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#FinancialInstrumentsDerivativesinForeignCurrencyHedgingRelationshipsDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/FinancialInstrumentsDerivativesinForeignCurrencyHedgingRelationshipsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_3cd2cd54-f48b-432c-8a13-375a6ff5c128" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_050feea7-06f2-439a-8613-7ff6bf2f6efe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_3cd2cd54-f48b-432c-8a13-375a6ff5c128" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_050feea7-06f2-439a-8613-7ff6bf2f6efe" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_147c3134-0301-4f0d-9f05-e5ee7b4c2ae3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_050feea7-06f2-439a-8613-7ff6bf2f6efe" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_147c3134-0301-4f0d-9f05-e5ee7b4c2ae3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_147c3134-0301-4f0d-9f05-e5ee7b4c2ae3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_147c3134-0301-4f0d-9f05-e5ee7b4c2ae3" xlink:to="loc_us-gaap_HedgingRelationshipDomain_147c3134-0301-4f0d-9f05-e5ee7b4c2ae3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_8ff52b44-69bf-4860-ae0b-b755be2d992b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_147c3134-0301-4f0d-9f05-e5ee7b4c2ae3" xlink:to="loc_us-gaap_HedgingRelationshipDomain_8ff52b44-69bf-4860-ae0b-b755be2d992b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueHedgingMember_1944b827-042a-4046-9e90-5ee80f87f626" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_8ff52b44-69bf-4860-ae0b-b755be2d992b" xlink:to="loc_us-gaap_FairValueHedgingMember_1944b827-042a-4046-9e90-5ee80f87f626" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_d44ba7b3-5388-44b7-bcea-39b598a47395" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_3cd2cd54-f48b-432c-8a13-375a6ff5c128" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_d44ba7b3-5388-44b7-bcea-39b598a47395" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_6c5e299a-751a-4d58-8305-d774d88a110d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_3cd2cd54-f48b-432c-8a13-375a6ff5c128" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_6c5e299a-751a-4d58-8305-d774d88a110d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentGainLossReclassifiedFromAociIntoIncomeEffectivePortionStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_d2279218-8480-460f-9cb8-241b4c019137" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentGainLossReclassifiedFromAociIntoIncomeEffectivePortionStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_3cd2cd54-f48b-432c-8a13-375a6ff5c128" xlink:to="loc_us-gaap_DerivativeInstrumentGainLossReclassifiedFromAociIntoIncomeEffectivePortionStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_d2279218-8480-460f-9cb8-241b4c019137" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.imax.com/role/NonControllingInterestsDetails" xlink:type="simple" xlink:href="imax-20250331.xsd#NonControllingInterestsDetails"/>
  <link:definitionLink xlink:role="http://www.imax.com/role/NonControllingInterestsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_d4326fca-18de-4f31-b7c4-f283c553489c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RedeemableNoncontrollingInterestLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_c7324dcb-c87d-432f-a7f4-7b612b062fe3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_d4326fca-18de-4f31-b7c4-f283c553489c" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_c7324dcb-c87d-432f-a7f4-7b612b062fe3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_76c627d2-f4f1-4300-9119-10d7b013d68d" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_c7324dcb-c87d-432f-a7f4-7b612b062fe3" xlink:to="loc_srt_OwnershipAxis_76c627d2-f4f1-4300-9119-10d7b013d68d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_76c627d2-f4f1-4300-9119-10d7b013d68d_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_76c627d2-f4f1-4300-9119-10d7b013d68d" xlink:to="loc_srt_OwnershipDomain_76c627d2-f4f1-4300-9119-10d7b013d68d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_e43d95fb-c5f9-4d44-bc20-bc380044d507" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_76c627d2-f4f1-4300-9119-10d7b013d68d" xlink:to="loc_srt_OwnershipDomain_e43d95fb-c5f9-4d44-bc20-bc380044d507" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_ImaxChinaNoncontrollingInterestMember_fb938970-2e50-4228-a25d-b3346c348f4a" xlink:href="imax-20250331.xsd#imax_ImaxChinaNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_e43d95fb-c5f9-4d44-bc20-bc380044d507" xlink:to="loc_imax_ImaxChinaNoncontrollingInterestMember_fb938970-2e50-4228-a25d-b3346c348f4a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_aa1681bd-6c05-4da2-bc33-be7ad1290f1d" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_c7324dcb-c87d-432f-a7f4-7b612b062fe3" xlink:to="loc_srt_ConsolidatedEntitiesAxis_aa1681bd-6c05-4da2-bc33-be7ad1290f1d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_aa1681bd-6c05-4da2-bc33-be7ad1290f1d_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_aa1681bd-6c05-4da2-bc33-be7ad1290f1d" xlink:to="loc_srt_ConsolidatedEntitiesDomain_aa1681bd-6c05-4da2-bc33-be7ad1290f1d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_b4db7783-d2c1-43db-adda-9da59b018869" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_aa1681bd-6c05-4da2-bc33-be7ad1290f1d" xlink:to="loc_srt_ConsolidatedEntitiesDomain_b4db7783-d2c1-43db-adda-9da59b018869" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_imax_IMAXChinaMember_efcfa464-fc24-447e-adb5-c0360a954085" xlink:href="imax-20250331.xsd#imax_IMAXChinaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_b4db7783-d2c1-43db-adda-9da59b018869" xlink:to="loc_imax_IMAXChinaMember_efcfa464-fc24-447e-adb5-c0360a954085" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_008a18a0-6bec-4722-9646-4886a7f48f19" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_d4326fca-18de-4f31-b7c4-f283c553489c" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_008a18a0-6bec-4722-9646-4886a7f48f19" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterest_3915ca38-1ab7-4195-b226-6803949e451f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MinorityInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_d4326fca-18de-4f31-b7c4-f283c553489c" xlink:to="loc_us-gaap_MinorityInterest_3915ca38-1ab7-4195-b226-6803949e451f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_74f20dee-29f7-4327-abd4-685b04f52f29" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_d4326fca-18de-4f31-b7c4-f283c553489c" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_74f20dee-29f7-4327-abd4-685b04f52f29" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-roles-2024.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet" xlink:type="arc" order="101"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract" xlink:to="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:type="arc" order="31"/>
  </link:definitionLink>
</link:linkbase>
