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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:01a03ec0-f7bf-750c-8d4c-89de94785a7b,g:de9c0651-1a45-444a-a70e-7f8692fdbc5b-->
<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.msgsports.com/role/CoverPage" xlink:type="simple" xlink:href="msgk-20260930.xsd#CoverPage"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/CoverPage" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_01a03ec0-f913-7e97-85e5-4ecfe7ceaf55" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_DocumentInformationTable_01a03ec0-f913-7e97-85e5-4ecfe7ceaf55" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f913-7d33-be3d-415a2d6b0462" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_01a03ec0-f913-7e97-85e5-4ecfe7ceaf55" xlink:to="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f913-7d33-be3d-415a2d6b0462" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-7d33-be3d-415a2d6b0462_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f913-7d33-be3d-415a2d6b0462" xlink:to="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-7d33-be3d-415a2d6b0462_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-760c-b690-654575f8439d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f913-7d33-be3d-415a2d6b0462" xlink:to="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-760c-b690-654575f8439d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_01a03ec0-f913-7c9e-9c0b-7412016a080c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-760c-b690-654575f8439d" xlink:to="loc_us-gaap_CommonClassAMember_01a03ec0-f913-7c9e-9c0b-7412016a080c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_01a03ec0-f913-7f5a-a5e8-b9665a862300" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-760c-b690-654575f8439d" xlink:to="loc_us-gaap_CommonClassBMember_01a03ec0-f913-7f5a-a5e8-b9665a862300" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_01a03ec0-f913-7518-899a-f282accca17c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_DocumentType_01a03ec0-f913-7518-899a-f282accca17c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_01a03ec0-f913-7aba-8056-236cc3ca45f8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_DocumentQuarterlyReport_01a03ec0-f913-7aba-8056-236cc3ca45f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_01a03ec0-f913-7c93-88ac-8f90f74fa2fd" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_DocumentPeriodEndDate_01a03ec0-f913-7c93-88ac-8f90f74fa2fd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_01a03ec0-f913-71ff-b744-2a578128fe63" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_DocumentTransitionReport_01a03ec0-f913-71ff-b744-2a578128fe63" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_01a03ec0-f913-75f6-aec3-69559ef7452b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityFileNumber_01a03ec0-f913-75f6-aec3-69559ef7452b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_01a03ec0-f913-71a2-a951-c07ee9fea0c5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityRegistrantName_01a03ec0-f913-71a2-a951-c07ee9fea0c5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_01a03ec0-f913-7189-bb73-0fe64edde6d9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityIncorporationStateCountryCode_01a03ec0-f913-7189-bb73-0fe64edde6d9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_01a03ec0-f913-7736-97a0-6c93e45336dd" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityTaxIdentificationNumber_01a03ec0-f913-7736-97a0-6c93e45336dd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_01a03ec0-f913-73cc-a95c-9f8b5f5fdfaa" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityAddressAddressLine1_01a03ec0-f913-73cc-a95c-9f8b5f5fdfaa" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_01a03ec0-f913-70e0-a087-be9f32300322" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityAddressCityOrTown_01a03ec0-f913-70e0-a087-be9f32300322" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_01a03ec0-f913-7ad5-988b-cf1615592051" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityAddressStateOrProvince_01a03ec0-f913-7ad5-988b-cf1615592051" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_01a03ec0-f913-7773-8735-4cc8b43d0991" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityAddressPostalZipCode_01a03ec0-f913-7773-8735-4cc8b43d0991" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_01a03ec0-f913-7745-bca7-b6ab2fcd7a78" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_CityAreaCode_01a03ec0-f913-7745-bca7-b6ab2fcd7a78" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_01a03ec0-f913-768f-beb3-8ea14ba6cd3f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_LocalPhoneNumber_01a03ec0-f913-768f-beb3-8ea14ba6cd3f" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationFormerLegalOrRegisteredName_01a19a10-e42d-7453-bb6f-437f1fb3ab72" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInformationFormerLegalOrRegisteredName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityInformationFormerLegalOrRegisteredName_01a19a10-e42d-7453-bb6f-437f1fb3ab72" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_01a03ec0-f913-7056-8daa-20a4d09faff6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_Security12bTitle_01a03ec0-f913-7056-8daa-20a4d09faff6" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_01a03ec0-f913-767b-9530-e5fe9fa8f323" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_TradingSymbol_01a03ec0-f913-767b-9530-e5fe9fa8f323" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_01a03ec0-f913-75d5-ae7a-1b7238981957" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_SecurityExchangeName_01a03ec0-f913-75d5-ae7a-1b7238981957" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_01a03ec0-f913-7afd-ba51-03172d6946de" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityCurrentReportingStatus_01a03ec0-f913-7afd-ba51-03172d6946de" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_01a03ec0-f913-7465-993b-7fd6a1e3387c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityInteractiveDataCurrent_01a03ec0-f913-7465-993b-7fd6a1e3387c" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_01a03ec0-f913-7612-a2f0-455886fe5c6a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityFilerCategory_01a03ec0-f913-7612-a2f0-455886fe5c6a" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_01a03ec0-f913-7bea-b7aa-885adb9b60ad" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntitySmallBusiness_01a03ec0-f913-7bea-b7aa-885adb9b60ad" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_01a03ec0-f913-7489-99ff-410fa84bb0b8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityEmergingGrowthCompany_01a03ec0-f913-7489-99ff-410fa84bb0b8" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_01a03ec0-f913-75c5-b88d-7d9945fc2f01" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityShellCompany_01a03ec0-f913-75c5-b88d-7d9945fc2f01" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_01a03ec0-f913-732b-8640-44548e2bdb14" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_01a03ec0-f913-732b-8640-44548e2bdb14" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_01a03ec0-f913-749e-8bb9-4b18930e7371" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_EntityCentralIndexKey_01a03ec0-f913-749e-8bb9-4b18930e7371" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_01a03ec0-f913-7d2a-aa8d-e7ef945cc8db" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_CurrentFiscalYearEndDate_01a03ec0-f913-7d2a-aa8d-e7ef945cc8db" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_01a03ec0-f913-735f-abbd-6a81bdc3441f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_DocumentFiscalYearFocus_01a03ec0-f913-735f-abbd-6a81bdc3441f" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_01a03ec0-f913-782d-86a6-b94b78fadd4a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_DocumentFiscalPeriodFocus_01a03ec0-f913-782d-86a6-b94b78fadd4a" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_01a03ec0-f913-7870-b61c-8efa2f8b5478" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_01a03ec0-f913-7e08-8a63-b87db4406117" xlink:to="loc_dei_AmendmentFlag_01a03ec0-f913-7870-b61c-8efa2f8b5478" xlink:type="arc" order="29"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="msgk-20260930.xsd#CONSOLIDATEDBALANCESHEETS"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_01a03ec0-f913-72f9-bd9a-edcb84b2e529" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_01a03ec0-f913-7419-9f16-0202a3abb849" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-72f9-bd9a-edcb84b2e529" xlink:to="loc_us-gaap_StatementTable_01a03ec0-f913-7419-9f16-0202a3abb849" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f913-7fec-abc0-cf4a329bce93" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_01a03ec0-f913-7419-9f16-0202a3abb849" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f913-7fec-abc0-cf4a329bce93" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7fec-abc0-cf4a329bce93_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f913-7fec-abc0-cf4a329bce93" xlink:to="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7fec-abc0-cf4a329bce93_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7628-a887-04cbb4ac1cd1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f913-7fec-abc0-cf4a329bce93" xlink:to="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7628-a887-04cbb4ac1cd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonrelatedPartyMember_01a03ec0-f913-7f5e-b4be-9fafc5e7f3ac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonrelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7628-a887-04cbb4ac1cd1" xlink:to="loc_us-gaap_NonrelatedPartyMember_01a03ec0-f913-7f5e-b4be-9fafc5e7f3ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_01a03ec0-f913-7923-bf2a-73e3421f4d54" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7628-a887-04cbb4ac1cd1" xlink:to="loc_us-gaap_RelatedPartyMember_01a03ec0-f913-7923-bf2a-73e3421f4d54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f913-79b2-ba02-510bb840f43a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_01a03ec0-f913-7419-9f16-0202a3abb849" xlink:to="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f913-79b2-ba02-510bb840f43a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-79b2-ba02-510bb840f43a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f913-79b2-ba02-510bb840f43a" xlink:to="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-79b2-ba02-510bb840f43a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-709f-845c-611fbc812c0d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f913-79b2-ba02-510bb840f43a" xlink:to="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-709f-845c-611fbc812c0d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_01a03ec0-f913-7f0c-8c69-96586cac571f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-709f-845c-611fbc812c0d" xlink:to="loc_us-gaap_CommonClassAMember_01a03ec0-f913-7f0c-8c69-96586cac571f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_01a03ec0-f913-7404-95e0-3cc493a5320b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-709f-845c-611fbc812c0d" xlink:to="loc_us-gaap_CommonClassBMember_01a03ec0-f913-7404-95e0-3cc493a5320b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_01a03ec0-f913-7e53-bf39-8bcb405c1de8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-72f9-bd9a-edcb84b2e529" xlink:to="loc_us-gaap_AssetsAbstract_01a03ec0-f913-7e53-bf39-8bcb405c1de8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_01a03ec0-f913-7634-a585-9242360c096c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a03ec0-f913-7e53-bf39-8bcb405c1de8" xlink:to="loc_us-gaap_AssetsCurrentAbstract_01a03ec0-f913-7634-a585-9242360c096c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_01a03ec0-f913-73b2-8cd3-f5f41edcd7c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_01a03ec0-f913-7634-a585-9242360c096c" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_01a03ec0-f913-73b2-8cd3-f5f41edcd7c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_01a03ec0-f913-74e5-b34d-810c1a0e2a88" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_01a03ec0-f913-7634-a585-9242360c096c" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_01a03ec0-f913-74e5-b34d-810c1a0e2a88" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseCurrent_01a03ec0-f913-7d58-8f13-96853f4d4f02" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_01a03ec0-f913-7634-a585-9242360c096c" xlink:to="loc_us-gaap_PrepaidExpenseCurrent_01a03ec0-f913-7d58-8f13-96853f4d4f02" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_01a03ec0-f913-7eb2-952f-b38189a3ffab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_01a03ec0-f913-7634-a585-9242360c096c" xlink:to="loc_us-gaap_OtherAssetsCurrent_01a03ec0-f913-7eb2-952f-b38189a3ffab" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_01a03ec0-f913-7dc6-8937-b3da756a3df3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_01a03ec0-f913-7634-a585-9242360c096c" xlink:to="loc_us-gaap_AssetsCurrent_01a03ec0-f913-7dc6-8937-b3da756a3df3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_01a03ec0-f913-7502-886a-0739940b7d9f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a03ec0-f913-7e53-bf39-8bcb405c1de8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_01a03ec0-f913-7502-886a-0739940b7d9f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_01a03ec0-f913-7d38-b04e-03632b44c393" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a03ec0-f913-7e53-bf39-8bcb405c1de8" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_01a03ec0-f913-7d38-b04e-03632b44c393" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_01a03ec0-f913-7e93-a2e5-cdb130c9c404" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a03ec0-f913-7e53-bf39-8bcb405c1de8" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_01a03ec0-f913-7e93-a2e5-cdb130c9c404" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_01a03ec0-f913-7ad7-89da-dcad5b2266b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a03ec0-f913-7e53-bf39-8bcb405c1de8" xlink:to="loc_us-gaap_Goodwill_01a03ec0-f913-7ad7-89da-dcad5b2266b5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_01a03ec0-f913-79be-b32b-48a3f3d0f8ac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Investments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a03ec0-f913-7e53-bf39-8bcb405c1de8" xlink:to="loc_us-gaap_Investments_01a03ec0-f913-79be-b32b-48a3f3d0f8ac" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_01a03ec0-f913-7f79-8402-3e35e50b9bdc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a03ec0-f913-7e53-bf39-8bcb405c1de8" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_01a03ec0-f913-7f79-8402-3e35e50b9bdc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_01a03ec0-f913-7491-9dc8-881802b5a1bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a03ec0-f913-7e53-bf39-8bcb405c1de8" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_01a03ec0-f913-7491-9dc8-881802b5a1bf" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_01a03ec0-f913-7bdd-95c7-bd454e1e717b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a03ec0-f913-7e53-bf39-8bcb405c1de8" xlink:to="loc_us-gaap_Assets_01a03ec0-f913-7bdd-95c7-bd454e1e717b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a03ec0-f913-7108-83e9-7934ed28d085" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-72f9-bd9a-edcb84b2e529" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a03ec0-f913-7108-83e9-7934ed28d085" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_01a03ec0-f913-77f3-b7ad-d441ef67dc3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a03ec0-f913-7108-83e9-7934ed28d085" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_01a03ec0-f913-77f3-b7ad-d441ef67dc3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_01a03ec0-f913-70a0-8163-7217c260faee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_01a03ec0-f913-77f3-b7ad-d441ef67dc3c" xlink:to="loc_us-gaap_AccountsPayableCurrent_01a03ec0-f913-70a0-8163-7217c260faee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_01a03ec0-f913-7c98-9697-177e17e70afa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_01a03ec0-f913-77f3-b7ad-d441ef67dc3c" xlink:to="loc_us-gaap_ShortTermBorrowings_01a03ec0-f913-7c98-9697-177e17e70afa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrentAbstract_01a03ec0-f913-731e-9bef-0beecb182e97" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_01a03ec0-f913-77f3-b7ad-d441ef67dc3c" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrentAbstract_01a03ec0-f913-731e-9bef-0beecb182e97" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_01a03ec0-f913-7caf-93f6-e66d8ac10778" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrentAbstract_01a03ec0-f913-731e-9bef-0beecb182e97" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_01a03ec0-f913-7caf-93f6-e66d8ac10778" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_AccruedLeagueRelatedChargesCurrent_01a03ec0-f913-75ce-b806-272897cb280a" xlink:href="msgk-20260930.xsd#msgk_AccruedLeagueRelatedChargesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrentAbstract_01a03ec0-f913-731e-9bef-0beecb182e97" xlink:to="loc_msgk_AccruedLeagueRelatedChargesCurrent_01a03ec0-f913-75ce-b806-272897cb280a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_01a03ec0-f913-7a57-8e11-97dbe97581b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrentAbstract_01a03ec0-f913-731e-9bef-0beecb182e97" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_01a03ec0-f913-7a57-8e11-97dbe97581b2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_01a03ec0-f913-7b70-92c8-7268a395ce04" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_01a03ec0-f913-77f3-b7ad-d441ef67dc3c" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_01a03ec0-f913-7b70-92c8-7268a395ce04" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_01a03ec0-f913-7de7-a957-d6907ccf91a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_01a03ec0-f913-77f3-b7ad-d441ef67dc3c" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_01a03ec0-f913-7de7-a957-d6907ccf91a5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_01a03ec0-f913-77bc-a691-f5b03de8d6b3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_01a03ec0-f913-77f3-b7ad-d441ef67dc3c" xlink:to="loc_us-gaap_LiabilitiesCurrent_01a03ec0-f913-77bc-a691-f5b03de8d6b3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_01a03ec0-f913-796e-9466-01951e38b5ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a03ec0-f913-7108-83e9-7934ed28d085" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_01a03ec0-f913-796e-9466-01951e38b5ba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_01a03ec0-f913-7004-843f-dca0430f3e9c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a03ec0-f913-7108-83e9-7934ed28d085" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_01a03ec0-f913-7004-843f-dca0430f3e9c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_OtherEmployeeRelatedLiabilitiesNoncurrent_01a03ec0-f913-7e8b-8cb3-6fae039de815" xlink:href="msgk-20260930.xsd#msgk_OtherEmployeeRelatedLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a03ec0-f913-7108-83e9-7934ed28d085" xlink:to="loc_msgk_OtherEmployeeRelatedLiabilitiesNoncurrent_01a03ec0-f913-7e8b-8cb3-6fae039de815" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_01a03ec0-f913-772f-b084-a80b16d8f00b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a03ec0-f913-7108-83e9-7934ed28d085" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_01a03ec0-f913-772f-b084-a80b16d8f00b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_01a03ec0-f913-7800-b88a-6feb6fc62b1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a03ec0-f913-7108-83e9-7934ed28d085" xlink:to="loc_us-gaap_Liabilities_01a03ec0-f913-7800-b88a-6feb6fc62b1a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_01a03ec0-f913-7c62-a53f-9dd2c3325115" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a03ec0-f913-7108-83e9-7934ed28d085" xlink:to="loc_us-gaap_CommitmentsAndContingencies_01a03ec0-f913-7c62-a53f-9dd2c3325115" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_01a03ec0-f913-7e1c-8c2a-746a46bcfd98" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a03ec0-f913-7108-83e9-7934ed28d085" xlink:to="loc_us-gaap_StockholdersEquityAbstract_01a03ec0-f913-7e1c-8c2a-746a46bcfd98" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_01a03ec0-f913-7201-8e34-0e17013a3232" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_01a03ec0-f913-7e1c-8c2a-746a46bcfd98" xlink:to="loc_us-gaap_CommonStockValue_01a03ec0-f913-7201-8e34-0e17013a3232" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_01a03ec0-f913-7f89-b73c-fd53be50274d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_01a03ec0-f913-7e1c-8c2a-746a46bcfd98" xlink:to="loc_us-gaap_PreferredStockValue_01a03ec0-f913-7f89-b73c-fd53be50274d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_01a03ec0-f913-7389-b0b4-345457250d0d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_01a03ec0-f913-7e1c-8c2a-746a46bcfd98" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_01a03ec0-f913-7389-b0b4-345457250d0d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonValue_01a03ec0-f913-7094-973c-a9f7953920f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockCommonValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_01a03ec0-f913-7e1c-8c2a-746a46bcfd98" xlink:to="loc_us-gaap_TreasuryStockCommonValue_01a03ec0-f913-7094-973c-a9f7953920f9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_01a03ec0-f913-7f38-9564-96803fcc4e5f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_01a03ec0-f913-7e1c-8c2a-746a46bcfd98" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_01a03ec0-f913-7f38-9564-96803fcc4e5f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_01a03ec0-f913-7ebd-abfc-59a99e43125d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_01a03ec0-f913-7e1c-8c2a-746a46bcfd98" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_01a03ec0-f913-7ebd-abfc-59a99e43125d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_01a03ec0-f913-7a6c-96f2-5ba5a8ee9f03" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_01a03ec0-f913-7e1c-8c2a-746a46bcfd98" xlink:to="loc_us-gaap_StockholdersEquity_01a03ec0-f913-7a6c-96f2-5ba5a8ee9f03" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_01a03ec0-f913-7856-bfb9-860f25145122" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a03ec0-f913-7108-83e9-7934ed28d085" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_01a03ec0-f913-7856-bfb9-860f25145122" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/CONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="simple" xlink:href="msgk-20260930.xsd#CONSOLIDATEDBALANCESHEETSParenthetical"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/CONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_01a03ec0-f913-7628-aa29-ef4596afa11b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_01a03ec0-f913-75d2-b8a1-617cb9f61e4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-7628-aa29-ef4596afa11b" xlink:to="loc_us-gaap_StatementTable_01a03ec0-f913-75d2-b8a1-617cb9f61e4e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f913-79da-9078-0e49ce3a19e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_01a03ec0-f913-75d2-b8a1-617cb9f61e4e" xlink:to="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f913-79da-9078-0e49ce3a19e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-79da-9078-0e49ce3a19e3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f913-79da-9078-0e49ce3a19e3" xlink:to="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-79da-9078-0e49ce3a19e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-789b-ae41-9079afd35ac7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f913-79da-9078-0e49ce3a19e3" xlink:to="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-789b-ae41-9079afd35ac7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_01a03ec0-f913-78f8-9206-6e40fb3e1678" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-789b-ae41-9079afd35ac7" xlink:to="loc_us-gaap_CommonClassAMember_01a03ec0-f913-78f8-9206-6e40fb3e1678" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_01a03ec0-f913-7906-8822-bd6ac56a3307" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a03ec0-f913-789b-ae41-9079afd35ac7" xlink:to="loc_us-gaap_CommonClassBMember_01a03ec0-f913-7906-8822-bd6ac56a3307" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_01a03ec0-f913-73d6-86e5-7d0d7075d73e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-7628-aa29-ef4596afa11b" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_01a03ec0-f913-73d6-86e5-7d0d7075d73e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_01a03ec0-f913-73b7-b8ff-e3d2941cc98d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-7628-aa29-ef4596afa11b" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_01a03ec0-f913-73b7-b8ff-e3d2941cc98d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_01a03ec0-f913-75be-86a0-56f7268d1d0b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-7628-aa29-ef4596afa11b" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_01a03ec0-f913-75be-86a0-56f7268d1d0b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_01a03ec0-f913-7c97-8201-1c6a33242c47" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-7628-aa29-ef4596afa11b" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_01a03ec0-f913-7c97-8201-1c6a33242c47" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_01a03ec0-f913-7dad-8a9e-47ea2bdbc945" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-7628-aa29-ef4596afa11b" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_01a03ec0-f913-7dad-8a9e-47ea2bdbc945" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_01a03ec0-f913-7256-b3ec-c6a25018f682" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-7628-aa29-ef4596afa11b" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_01a03ec0-f913-7256-b3ec-c6a25018f682" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_01a03ec0-f913-7c7b-a671-1beaedcaf521" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-7628-aa29-ef4596afa11b" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_01a03ec0-f913-7c7b-a671-1beaedcaf521" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_01a03ec0-f913-7201-a6c2-732f57a555bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-7628-aa29-ef4596afa11b" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_01a03ec0-f913-7201-a6c2-732f57a555bf" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_01a03ec0-f913-79dc-af38-67f0415319d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-7628-aa29-ef4596afa11b" xlink:to="loc_us-gaap_TreasuryStockCommonShares_01a03ec0-f913-79dc-af38-67f0415319d9" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSUnauditedParenthetical" xlink:type="simple" xlink:href="msgk-20260930.xsd#CONSOLIDATEDSTATEMENTSOFOPERATIONSUnauditedParenthetical"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSUnauditedParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_01a03ec0-f913-78e8-9bda-ae9c3e1d3b1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_01a03ec0-f913-726d-bcd6-8b86b8de331f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-78e8-9bda-ae9c3e1d3b1a" xlink:to="loc_us-gaap_StatementTable_01a03ec0-f913-726d-bcd6-8b86b8de331f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f913-7262-8277-ca8bf9299848" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_01a03ec0-f913-726d-bcd6-8b86b8de331f" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f913-7262-8277-ca8bf9299848" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7262-8277-ca8bf9299848_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f913-7262-8277-ca8bf9299848" xlink:to="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7262-8277-ca8bf9299848_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7538-bf30-81c1bc01c1a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f913-7262-8277-ca8bf9299848" xlink:to="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7538-bf30-81c1bc01c1a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_01a03ec0-f913-70ac-b6ac-8cf738f5975c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7538-bf30-81c1bc01c1a4" xlink:to="loc_us-gaap_RelatedPartyMember_01a03ec0-f913-70ac-b6ac-8cf738f5975c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_01a03ec0-f913-7a34-b463-19049bc2dad0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-78e8-9bda-ae9c3e1d3b1a" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_01a03ec0-f913-7a34-b463-19049bc2dad0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DirectOperatingCosts_01a03ec0-f913-7280-b915-2fc5248fa313" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DirectOperatingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-78e8-9bda-ae9c3e1d3b1a" xlink:to="loc_us-gaap_DirectOperatingCosts_01a03ec0-f913-7280-b915-2fc5248fa313" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_01a03ec0-f913-7ae7-ad3b-3fe8c79debc9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-78e8-9bda-ae9c3e1d3b1a" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_01a03ec0-f913-7ae7-ad3b-3fe8c79debc9" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/CONSOLIDATEDSTATEMENTSOFEQUITYUnaudited" xlink:type="simple" xlink:href="msgk-20260930.xsd#CONSOLIDATEDSTATEMENTSOFEQUITYUnaudited"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/CONSOLIDATEDSTATEMENTSOFEQUITYUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_01a03ec0-f913-7a5c-8da9-165192dafc46" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_01a03ec0-f913-7214-a6c0-1afca941c6a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-7a5c-8da9-165192dafc46" xlink:to="loc_us-gaap_StatementTable_01a03ec0-f913-7214-a6c0-1afca941c6a8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_01a03ec0-f913-745a-8acb-7d1a5374cd87" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_01a03ec0-f913-7214-a6c0-1afca941c6a8" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_01a03ec0-f913-745a-8acb-7d1a5374cd87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_01a03ec0-f913-745a-8acb-7d1a5374cd87_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_01a03ec0-f913-745a-8acb-7d1a5374cd87" xlink:to="loc_us-gaap_EquityComponentDomain_01a03ec0-f913-745a-8acb-7d1a5374cd87_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_01a03ec0-f913-75ee-965d-dd78625b23de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_01a03ec0-f913-745a-8acb-7d1a5374cd87" xlink:to="loc_us-gaap_EquityComponentDomain_01a03ec0-f913-75ee-965d-dd78625b23de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_01a03ec0-f913-7972-8e32-05f3fe24ae29" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_01a03ec0-f913-75ee-965d-dd78625b23de" xlink:to="loc_us-gaap_CommonStockMember_01a03ec0-f913-7972-8e32-05f3fe24ae29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_01a03ec0-f913-71f2-983d-3c0099154853" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_01a03ec0-f913-75ee-965d-dd78625b23de" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_01a03ec0-f913-71f2-983d-3c0099154853" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_01a03ec0-f913-73d7-92fa-59c01504b3ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_01a03ec0-f913-75ee-965d-dd78625b23de" xlink:to="loc_us-gaap_TreasuryStockCommonMember_01a03ec0-f913-73d7-92fa-59c01504b3ce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_01a03ec0-f913-7089-b270-b81cec83802e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_01a03ec0-f913-75ee-965d-dd78625b23de" xlink:to="loc_us-gaap_RetainedEarningsMember_01a03ec0-f913-7089-b270-b81cec83802e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_01a03ec0-f913-75f7-b5f4-52ac428df128" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_01a03ec0-f913-75ee-965d-dd78625b23de" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_01a03ec0-f913-75f7-b5f4-52ac428df128" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a03ec0-f913-74b6-a4de-895bf8d49f0a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a03ec0-f913-7a5c-8da9-165192dafc46" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a03ec0-f913-74b6-a4de-895bf8d49f0a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_01a03ec0-f913-79bd-bb93-2085096e0211" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a03ec0-f913-74b6-a4de-895bf8d49f0a" xlink:to="loc_us-gaap_StockholdersEquity_01a03ec0-f913-79bd-bb93-2085096e0211" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_01a03ec0-f913-78b8-b2ad-7ac0c36f8ece" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a03ec0-f913-74b6-a4de-895bf8d49f0a" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_01a03ec0-f913-78b8-b2ad-7ac0c36f8ece" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_01a03ec0-f913-7ddd-bac4-f66a11caa088" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a03ec0-f913-74b6-a4de-895bf8d49f0a" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_01a03ec0-f913-7ddd-bac4-f66a11caa088" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_StockIssuedDuringPeriodValueRestrictedStockUnitAward_01a03ec0-f913-7f61-8a59-7d03cb4c43d7" xlink:href="msgk-20260930.xsd#msgk_StockIssuedDuringPeriodValueRestrictedStockUnitAward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a03ec0-f913-74b6-a4de-895bf8d49f0a" xlink:to="loc_msgk_StockIssuedDuringPeriodValueRestrictedStockUnitAward_01a03ec0-f913-7f61-8a59-7d03cb4c43d7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_01a03ec0-f913-7431-8a5d-8549194ffcd7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a03ec0-f913-74b6-a4de-895bf8d49f0a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_01a03ec0-f913-7431-8a5d-8549194ffcd7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_01a03ec0-f913-7385-93fd-acbbeb66fdc4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a03ec0-f913-74b6-a4de-895bf8d49f0a" xlink:to="loc_us-gaap_NetIncomeLoss_01a03ec0-f913-7385-93fd-acbbeb66fdc4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_01a03ec0-f913-7bb8-8aca-000e01ca863d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a03ec0-f913-74b6-a4de-895bf8d49f0a" xlink:to="loc_us-gaap_DividendsCommonStockCash_01a03ec0-f913-7bb8-8aca-000e01ca863d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_01a03ec0-f913-745b-be07-d61d20759ded" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a03ec0-f913-74b6-a4de-895bf8d49f0a" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_01a03ec0-f913-745b-be07-d61d20759ded" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_01a03ec0-f913-7479-9c86-85963c9038e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/DescriptionofBusinessandBasisofPresentationDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#DescriptionofBusinessandBasisofPresentationDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/DescriptionofBusinessandBasisofPresentationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_01a143ee-12cf-72b4-9118-2be32e88b512" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_01a143ee-12cf-7b5a-b787-ec0e88cb576a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_01a143ee-12cf-72b4-9118-2be32e88b512" xlink:to="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_01a143ee-12cf-7b5a-b787-ec0e88cb576a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_01a143ee-12cf-74a9-a17c-32013caedccf" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_01a143ee-12cf-7b5a-b787-ec0e88cb576a" xlink:to="loc_srt_OwnershipAxis_01a143ee-12cf-74a9-a17c-32013caedccf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_01a143ee-12cf-74a9-a17c-32013caedccf_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_01a143ee-12cf-74a9-a17c-32013caedccf" xlink:to="loc_srt_OwnershipDomain_01a143ee-12cf-74a9-a17c-32013caedccf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_01a143ee-12cf-7d69-8c45-37d70133643c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_01a143ee-12cf-74a9-a17c-32013caedccf" xlink:to="loc_srt_OwnershipDomain_01a143ee-12cf-7d69-8c45-37d70133643c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_MSGRangersMember_01a18925-e3ae-7691-ae91-d2864e9772e8" xlink:href="msgk-20260930.xsd#msgk_MSGRangersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_01a143ee-12cf-7d69-8c45-37d70133643c" xlink:to="loc_msgk_MSGRangersMember_01a18925-e3ae-7691-ae91-d2864e9772e8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_01a143ee-12cf-75c5-9df7-ba8f8e677e48" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_01a143ee-12cf-7b5a-b787-ec0e88cb576a" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_01a143ee-12cf-75c5-9df7-ba8f8e677e48" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_01a143ee-12cf-75c5-9df7-ba8f8e677e48_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_01a143ee-12cf-75c5-9df7-ba8f8e677e48" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_01a143ee-12cf-75c5-9df7-ba8f8e677e48_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_01a143ee-12cf-7878-b486-40756d2d845c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_01a143ee-12cf-75c5-9df7-ba8f8e677e48" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_01a143ee-12cf-7878-b486-40756d2d845c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SpinoffMember_01a143f0-a140-7068-8cc7-5d81453a4b38" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SpinoffMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_01a143ee-12cf-7878-b486-40756d2d845c" xlink:to="loc_us-gaap_SpinoffMember_01a143f0-a140-7068-8cc7-5d81453a4b38" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_01a1698f-fe42-7b0b-b4c6-62afe667d1ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_01a143ee-12cf-7b5a-b787-ec0e88cb576a" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_01a1698f-fe42-7b0b-b4c6-62afe667d1ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_01a1698f-fe42-7b0b-b4c6-62afe667d1ad_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_01a1698f-fe42-7b0b-b4c6-62afe667d1ad" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_01a1698f-fe42-7b0b-b4c6-62afe667d1ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_01a1698f-fe42-7cd9-a1ce-8426cf3e9a9b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_01a1698f-fe42-7b0b-b4c6-62afe667d1ad" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_01a1698f-fe42-7cd9-a1ce-8426cf3e9a9b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_01a16990-1112-7f0c-969f-42b3f29fd1aa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_01a1698f-fe42-7cd9-a1ce-8426cf3e9a9b" xlink:to="loc_us-gaap_SubsequentEventMember_01a16990-1112-7f0c-969f-42b3f29fd1aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_01a143ee-12cf-7018-9fae-868607990dd8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_01a143ee-12cf-7b5a-b787-ec0e88cb576a" xlink:to="loc_dei_LegalEntityAxis_01a143ee-12cf-7018-9fae-868607990dd8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_01a143ee-12cf-7018-9fae-868607990dd8_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_01a143ee-12cf-7018-9fae-868607990dd8" xlink:to="loc_dei_EntityDomain_01a143ee-12cf-7018-9fae-868607990dd8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_01a143ee-12cf-7899-a1dc-965dafe2883d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_01a143ee-12cf-7018-9fae-868607990dd8" xlink:to="loc_dei_EntityDomain_01a143ee-12cf-7899-a1dc-965dafe2883d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_MSGStockholdersMember_01a143ee-12cf-7581-8cf7-64384e4d3e3b" xlink:href="msgk-20260930.xsd#msgk_MSGStockholdersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_01a143ee-12cf-7899-a1dc-965dafe2883d" xlink:to="loc_msgk_MSGStockholdersMember_01a143ee-12cf-7581-8cf7-64384e4d3e3b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_01a143f0-a140-7f6c-93ac-cc76e7700e21" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_01a143ee-12cf-7b5a-b787-ec0e88cb576a" xlink:to="loc_srt_ConsolidatedEntitiesAxis_01a143f0-a140-7f6c-93ac-cc76e7700e21" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_01a143f0-a140-7f6c-93ac-cc76e7700e21_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_01a143f0-a140-7f6c-93ac-cc76e7700e21" xlink:to="loc_srt_ConsolidatedEntitiesDomain_01a143f0-a140-7f6c-93ac-cc76e7700e21_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_01a143f0-a140-71f3-bd60-4102eddb9330" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_01a143f0-a140-7f6c-93ac-cc76e7700e21" xlink:to="loc_srt_ConsolidatedEntitiesDomain_01a143f0-a140-71f3-bd60-4102eddb9330" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_MSGRangersMember_01a18925-8da4-7188-a672-43b3d66a7490" xlink:href="msgk-20260930.xsd#msgk_MSGRangersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_01a143f0-a140-71f3-bd60-4102eddb9330" xlink:to="loc_msgk_MSGRangersMember_01a18925-8da4-7188-a672-43b3d66a7490" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_01a143f0-a140-7090-9886-bcbe038f50cf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_01a143ee-12cf-7b5a-b787-ec0e88cb576a" xlink:to="loc_us-gaap_StatementClassOfStockAxis_01a143f0-a140-7090-9886-bcbe038f50cf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a143f0-a140-7090-9886-bcbe038f50cf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a143f0-a140-7090-9886-bcbe038f50cf" xlink:to="loc_us-gaap_ClassOfStockDomain_01a143f0-a140-7090-9886-bcbe038f50cf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a143f0-a140-7bf1-969b-0e65c3e11115" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a143f0-a140-7090-9886-bcbe038f50cf" xlink:to="loc_us-gaap_ClassOfStockDomain_01a143f0-a140-7bf1-969b-0e65c3e11115" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_01a143f0-a140-79b8-820e-3aedb1ac9b6d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a143f0-a140-7bf1-969b-0e65c3e11115" xlink:to="loc_us-gaap_CommonClassAMember_01a143f0-a140-79b8-820e-3aedb1ac9b6d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_01a143f0-a140-7262-8b2d-3bac5dc5ba68" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a143f0-a140-7bf1-969b-0e65c3e11115" xlink:to="loc_us-gaap_CommonClassBMember_01a143f0-a140-7262-8b2d-3bac5dc5ba68" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_01a03ec0-f913-7ea4-b6b5-679eceaedf1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_01a143ee-12cf-72b4-9118-2be32e88b512" xlink:to="loc_us-gaap_NumberOfOperatingSegments_01a03ec0-f913-7ea4-b6b5-679eceaedf1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_01a03ec0-f913-77d1-ad47-0265e72ce303" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_01a143ee-12cf-72b4-9118-2be32e88b512" xlink:to="loc_us-gaap_NumberOfReportableSegments_01a03ec0-f913-77d1-ad47-0265e72ce303" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_01a143ee-12cf-7f8b-94a5-32f490b2a966" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_01a143ee-12cf-72b4-9118-2be32e88b512" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_01a143ee-12cf-7f8b-94a5-32f490b2a966" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_NumberOfSharesReceivedForEveryOneCommonStockSharesHeldOnRecordDate_01a143f0-a140-7dcb-a0d4-e53b14f151d4" xlink:href="msgk-20260930.xsd#msgk_NumberOfSharesReceivedForEveryOneCommonStockSharesHeldOnRecordDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_01a143ee-12cf-72b4-9118-2be32e88b512" xlink:to="loc_msgk_NumberOfSharesReceivedForEveryOneCommonStockSharesHeldOnRecordDate_01a143f0-a140-7dcb-a0d4-e53b14f151d4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_01a143f0-a140-7d84-acbf-cb65bc709821" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_01a143ee-12cf-72b4-9118-2be32e88b512" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_01a143f0-a140-7d84-acbf-cb65bc709821" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_CashContribution_01a19bf9-d6c1-7797-a23e-97c11abd5bb6" xlink:href="msgk-20260930.xsd#msgk_CashContribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_01a143ee-12cf-72b4-9118-2be32e88b512" xlink:to="loc_msgk_CashContribution_01a19bf9-d6c1-7797-a23e-97c11abd5bb6" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/RevenueRecognitionNarrativeDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#RevenueRecognitionNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/RevenueRecognitionNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_01a1696a-7a7e-7917-8db4-4a734e4146f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_01a1696a-7a7e-79e3-b2aa-7e003883f2c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a1696a-7a7e-7917-8db4-4a734e4146f4" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_01a1696a-7a7e-79e3-b2aa-7e003883f2c5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_01a1696a-7a7e-734c-8be3-061bbeed047e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a1696a-7a7e-79e3-b2aa-7e003883f2c5" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_01a1696a-7a7e-734c-8be3-061bbeed047e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a1696a-7a7e-734c-8be3-061bbeed047e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_01a1696a-7a7e-734c-8be3-061bbeed047e" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a1696a-7a7e-734c-8be3-061bbeed047e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a1696a-7a7e-79b7-9663-174b5945428b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_01a1696a-7a7e-734c-8be3-061bbeed047e" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a1696a-7a7e-79b7-9663-174b5945428b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_ReceivablesArisingFromContractsWithCustomersMember_01a1696a-7a7e-7b0e-ba0f-f0782db102db" xlink:href="msgk-20260930.xsd#msgk_ReceivablesArisingFromContractsWithCustomersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a1696a-7a7e-79b7-9663-174b5945428b" xlink:to="loc_msgk_ReceivablesArisingFromContractsWithCustomersMember_01a1696a-7a7e-7b0e-ba0f-f0782db102db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_ContractAssetsArisingFromContractWithCustomersMember_01a1696a-7a7e-7711-8830-9de3a16cb46d" xlink:href="msgk-20260930.xsd#msgk_ContractAssetsArisingFromContractWithCustomersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a1696a-7a7e-79b7-9663-174b5945428b" xlink:to="loc_msgk_ContractAssetsArisingFromContractWithCustomersMember_01a1696a-7a7e-7711-8830-9de3a16cb46d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_01a1696a-7a7e-7ac1-9bc6-fdadabbab17f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a1696a-7a7e-7917-8db4-4a734e4146f4" xlink:to="loc_us-gaap_AssetImpairmentCharges_01a1696a-7a7e-7ac1-9bc6-fdadabbab17f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/RevenueRecognitionScheduleofDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#RevenueRecognitionScheduleofDisaggregationofRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/RevenueRecognitionScheduleofDisaggregationofRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_01a03ec0-f913-7bc7-aee2-4644fe6f1d28" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_01a03ec0-f913-7213-be7d-8f1acefa9aa2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a03ec0-f913-7bc7-aee2-4644fe6f1d28" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_01a03ec0-f913-7213-be7d-8f1acefa9aa2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_01a03ec0-f913-7688-a01d-9a605b972b20" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a03ec0-f913-7213-be7d-8f1acefa9aa2" xlink:to="loc_srt_ProductOrServiceAxis_01a03ec0-f913-7688-a01d-9a605b972b20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a03ec0-f913-7688-a01d-9a605b972b20_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_01a03ec0-f913-7688-a01d-9a605b972b20" xlink:to="loc_srt_ProductsAndServicesDomain_01a03ec0-f913-7688-a01d-9a605b972b20_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a03ec0-f913-73ed-b9f1-d9236b39536b" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_01a03ec0-f913-7688-a01d-9a605b972b20" xlink:to="loc_srt_ProductsAndServicesDomain_01a03ec0-f913-73ed-b9f1-d9236b39536b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_EventRelatedMember_01a03ec0-f913-7e09-9ca7-d85cc68f9a0d" xlink:href="msgk-20260930.xsd#msgk_EventRelatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a03ec0-f913-73ed-b9f1-d9236b39536b" xlink:to="loc_msgk_EventRelatedMember_01a03ec0-f913-7e09-9ca7-d85cc68f9a0d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_MediaRightsMember_01a03ec0-f913-7e85-afac-058e4807a067" xlink:href="msgk-20260930.xsd#msgk_MediaRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a03ec0-f913-73ed-b9f1-d9236b39536b" xlink:to="loc_msgk_MediaRightsMember_01a03ec0-f913-7e85-afac-058e4807a067" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_SponsorshipSignageAndSuiteLicensesMember_01a03ec0-f913-7efa-add8-7986f55c78c3" xlink:href="msgk-20260930.xsd#msgk_SponsorshipSignageAndSuiteLicensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a03ec0-f913-73ed-b9f1-d9236b39536b" xlink:to="loc_msgk_SponsorshipSignageAndSuiteLicensesMember_01a03ec0-f913-7efa-add8-7986f55c78c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_LeagueDistributionMember_01a03ec0-f913-783c-9e9d-9bdc9a9885e2" xlink:href="msgk-20260930.xsd#msgk_LeagueDistributionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a03ec0-f913-73ed-b9f1-d9236b39536b" xlink:to="loc_msgk_LeagueDistributionMember_01a03ec0-f913-783c-9e9d-9bdc9a9885e2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_01a03ec0-f913-78c4-892a-c44bd19cc33b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a03ec0-f913-7bc7-aee2-4644fe6f1d28" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_01a03ec0-f913-78c4-892a-c44bd19cc33b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/RevenueRecognitionScheduleofContractBalancesDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#RevenueRecognitionScheduleofContractBalancesDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/RevenueRecognitionScheduleofContractBalancesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_msgk_ContractAssetsAndLiabilitiesLineItems_01a03ec0-f913-7a5d-a350-e46ecdc55ff9" xlink:href="msgk-20260930.xsd#msgk_ContractAssetsAndLiabilitiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_ContractAssetsAndLiabilitiesTable_01a03ec0-f913-7536-8d6a-b5186ba80303" xlink:href="msgk-20260930.xsd#msgk_ContractAssetsAndLiabilitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_msgk_ContractAssetsAndLiabilitiesLineItems_01a03ec0-f913-7a5d-a350-e46ecdc55ff9" xlink:to="loc_msgk_ContractAssetsAndLiabilitiesTable_01a03ec0-f913-7536-8d6a-b5186ba80303" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f913-7fee-81a9-88ac3f14d2b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_msgk_ContractAssetsAndLiabilitiesTable_01a03ec0-f913-7536-8d6a-b5186ba80303" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f913-7fee-81a9-88ac3f14d2b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7fee-81a9-88ac3f14d2b7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f913-7fee-81a9-88ac3f14d2b7" xlink:to="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7fee-81a9-88ac3f14d2b7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7988-b29c-1421d35b5642" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f913-7fee-81a9-88ac3f14d2b7" xlink:to="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7988-b29c-1421d35b5642" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_01a03ec0-f913-7fef-ac9c-cfa4c0a28ab3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_01a03ec0-f913-7988-b29c-1421d35b5642" xlink:to="loc_us-gaap_RelatedPartyMember_01a03ec0-f913-7fef-ac9c-cfa4c0a28ab3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_01a03ec0-f913-7723-ae30-00a1f7bb5fa2" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_msgk_ContractAssetsAndLiabilitiesTable_01a03ec0-f913-7536-8d6a-b5186ba80303" xlink:to="loc_srt_ProductOrServiceAxis_01a03ec0-f913-7723-ae30-00a1f7bb5fa2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a03ec0-f913-7723-ae30-00a1f7bb5fa2_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_01a03ec0-f913-7723-ae30-00a1f7bb5fa2" xlink:to="loc_srt_ProductsAndServicesDomain_01a03ec0-f913-7723-ae30-00a1f7bb5fa2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a03ec0-f913-76f8-9700-1e2044525bc5" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_01a03ec0-f913-7723-ae30-00a1f7bb5fa2" xlink:to="loc_srt_ProductsAndServicesDomain_01a03ec0-f913-76f8-9700-1e2044525bc5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_LocalMediaRightsMember_01a03ec0-f913-7ce9-81fc-f318f9e9f0b5" xlink:href="msgk-20260930.xsd#msgk_LocalMediaRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a03ec0-f913-76f8-9700-1e2044525bc5" xlink:to="loc_msgk_LocalMediaRightsMember_01a03ec0-f913-7ce9-81fc-f318f9e9f0b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerReceivableAfterAllowanceForCreditLossCurrent_01a03ec0-f913-79bf-8a50-4f827ad561bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerReceivableAfterAllowanceForCreditLossCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_msgk_ContractAssetsAndLiabilitiesLineItems_01a03ec0-f913-7a5d-a350-e46ecdc55ff9" xlink:to="loc_us-gaap_ContractWithCustomerReceivableAfterAllowanceForCreditLossCurrent_01a03ec0-f913-79bf-8a50-4f827ad561bb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNet_01a03ec0-f913-7594-a71e-0ee97f348c90" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_msgk_ContractAssetsAndLiabilitiesLineItems_01a03ec0-f913-7a5d-a350-e46ecdc55ff9" xlink:to="loc_us-gaap_ContractWithCustomerAssetNet_01a03ec0-f913-7594-a71e-0ee97f348c90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_01a03ec0-f913-7026-9695-aad4bcd89cc1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_msgk_ContractAssetsAndLiabilitiesLineItems_01a03ec0-f913-7a5d-a350-e46ecdc55ff9" xlink:to="loc_us-gaap_ContractWithCustomerLiability_01a03ec0-f913-7026-9695-aad4bcd89cc1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_01a03ec0-f913-7125-b581-8bd4f57bcd2c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_msgk_ContractAssetsAndLiabilitiesLineItems_01a03ec0-f913-7a5d-a350-e46ecdc55ff9" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_01a03ec0-f913-7125-b581-8bd4f57bcd2c" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/RevenueRecognitionScheduleofEstimatedRevenueExpectedtobeRecognizedintheFutureRelatedtoPerformanceObligationsDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#RevenueRecognitionScheduleofEstimatedRevenueExpectedtobeRecognizedintheFutureRelatedtoPerformanceObligationsDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/RevenueRecognitionScheduleofEstimatedRevenueExpectedtobeRecognizedintheFutureRelatedtoPerformanceObligationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_01a03ec0-f913-7940-8c05-1de57b68b0fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_01a03ec0-f913-7267-b9d8-5015c53ae030" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_01a03ec0-f913-7940-8c05-1de57b68b0fb" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_01a03ec0-f913-7267-b9d8-5015c53ae030" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_01a03ec0-f913-7fa6-b4eb-7024c55de32d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_01a03ec0-f913-7267-b9d8-5015c53ae030" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_01a03ec0-f913-7fa6-b4eb-7024c55de32d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_01a03ec0-f913-745b-82ed-88797d655f40" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_01a03ec0-f913-7940-8c05-1de57b68b0fb" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_01a03ec0-f913-745b-82ed-88797d655f40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_01a03ec0-f913-75d7-8e12-1ac4291d83de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_01a03ec0-f913-7940-8c05-1de57b68b0fb" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_01a03ec0-f913-75d7-8e12-1ac4291d83de" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/RevenueRecognitionScheduleofEstimatedRevenueExpectedtobeRecognizedintheFutureRelatedtoPerformanceObligationsDetails_1" xlink:type="simple" xlink:href="msgk-20260930.xsd#RevenueRecognitionScheduleofEstimatedRevenueExpectedtobeRecognizedintheFutureRelatedtoPerformanceObligationsDetails_1"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/RevenueRecognitionScheduleofEstimatedRevenueExpectedtobeRecognizedintheFutureRelatedtoPerformanceObligationsDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_01a03ec0-f913-7940-8c05-1de57b68b0fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_01a03ec0-f913-7267-b9d8-5015c53ae030" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_01a03ec0-f913-7940-8c05-1de57b68b0fb" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_01a03ec0-f913-7267-b9d8-5015c53ae030" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_01a03ec0-f913-745b-82ed-88797d655f40" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_01a03ec0-f913-7940-8c05-1de57b68b0fb" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_01a03ec0-f913-745b-82ed-88797d655f40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_01a03ec0-f913-75d7-8e12-1ac4291d83de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_01a03ec0-f913-7940-8c05-1de57b68b0fb" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_01a03ec0-f913-75d7-8e12-1ac4291d83de" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/LeasesNarrativeDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#LeasesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/LeasesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7fdd-8a58-cd930b4a3c64" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_01a03ec0-f913-703f-9175-a8611973a140" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7fdd-8a58-cd930b4a3c64" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_01a03ec0-f913-703f-9175-a8611973a140" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransactionTypeAxis_01a03ec0-f913-7711-8761-ab2c2f73e35d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransactionTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_01a03ec0-f913-703f-9175-a8611973a140" xlink:to="loc_us-gaap_TransactionTypeAxis_01a03ec0-f913-7711-8761-ab2c2f73e35d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransactionDomain_01a03ec0-f913-7711-8761-ab2c2f73e35d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TransactionTypeAxis_01a03ec0-f913-7711-8761-ab2c2f73e35d" xlink:to="loc_us-gaap_TransactionDomain_01a03ec0-f913-7711-8761-ab2c2f73e35d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransactionDomain_01a03ec0-f913-775e-bc63-166f4d529c59" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TransactionTypeAxis_01a03ec0-f913-7711-8761-ab2c2f73e35d" xlink:to="loc_us-gaap_TransactionDomain_01a03ec0-f913-775e-bc63-166f4d529c59" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_NewMSGELeaseAgreementMember_01a03ec0-f913-711e-a299-2cb5c22136e2" xlink:href="msgk-20260930.xsd#msgk_NewMSGELeaseAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransactionDomain_01a03ec0-f913-775e-bc63-166f4d529c59" xlink:to="loc_msgk_NewMSGELeaseAgreementMember_01a03ec0-f913-711e-a299-2cb5c22136e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_01a03ec0-f913-742f-8fc8-c228d613391c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_01a03ec0-f913-703f-9175-a8611973a140" xlink:to="loc_srt_RangeAxis_01a03ec0-f913-742f-8fc8-c228d613391c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_01a03ec0-f913-742f-8fc8-c228d613391c_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_01a03ec0-f913-742f-8fc8-c228d613391c" xlink:to="loc_srt_RangeMember_01a03ec0-f913-742f-8fc8-c228d613391c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_01a03ec0-f913-77b3-99bc-fdaf62367a48" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_01a03ec0-f913-742f-8fc8-c228d613391c" xlink:to="loc_srt_RangeMember_01a03ec0-f913-77b3-99bc-fdaf62367a48" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_01a03ec0-f913-7065-a0c3-783d9949c5fe" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_01a03ec0-f913-77b3-99bc-fdaf62367a48" xlink:to="loc_srt_MinimumMember_01a03ec0-f913-7065-a0c3-783d9949c5fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_01a03ec0-f913-70ce-af4e-c115e6d8e400" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_01a03ec0-f913-77b3-99bc-fdaf62367a48" xlink:to="loc_srt_MaximumMember_01a03ec0-f913-70ce-af4e-c115e6d8e400" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_01a03ec0-f913-7203-b523-a4af9a3094e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7fdd-8a58-cd930b4a3c64" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_01a03ec0-f913-7203-b523-a4af9a3094e4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_LesseeOperatingSubleaseCommitmentTerms_01a03ec0-f913-7c64-8d81-9f1e8a416a9b" xlink:href="msgk-20260930.xsd#msgk_LesseeOperatingSubleaseCommitmentTerms"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7fdd-8a58-cd930b4a3c64" xlink:to="loc_msgk_LesseeOperatingSubleaseCommitmentTerms_01a03ec0-f913-7c64-8d81-9f1e8a416a9b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_01a03ec0-f913-7778-b751-55b21c1fbfd4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseRemainingLeaseTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7fdd-8a58-cd930b4a3c64" xlink:to="loc_us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_01a03ec0-f913-7778-b751-55b21c1fbfd4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseOptionToExtend_01a03ec0-f913-76d8-bf23-b3a8d0d5f98f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseOptionToExtend"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7fdd-8a58-cd930b4a3c64" xlink:to="loc_us-gaap_LesseeOperatingLeaseOptionToExtend_01a03ec0-f913-76d8-bf23-b3a8d0d5f98f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRestrictionOrCovenant_01a03ec0-f913-71a2-bf13-438763b3d62d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseRestrictionOrCovenant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7fdd-8a58-cd930b4a3c64" xlink:to="loc_us-gaap_LesseeOperatingLeaseRestrictionOrCovenant_01a03ec0-f913-71a2-bf13-438763b3d62d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeasePayments_01a03ec0-f913-7383-b3c7-6a58d400bbff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeasePayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7fdd-8a58-cd930b4a3c64" xlink:to="loc_us-gaap_OperatingLeasePayments_01a03ec0-f913-7383-b3c7-6a58d400bbff" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_01a03ec0-f913-707e-89a7-44510923b0df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7fdd-8a58-cd930b4a3c64" xlink:to="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_01a03ec0-f913-707e-89a7-44510923b0df" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_01a03ec0-f913-7987-b3a1-4e55c6709007" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7fdd-8a58-cd930b4a3c64" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_01a03ec0-f913-7987-b3a1-4e55c6709007" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_01a03ec0-f913-78ec-be0f-22d9ad39191c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7fdd-8a58-cd930b4a3c64" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_01a03ec0-f913-78ec-be0f-22d9ad39191c" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/LeasesScheduleofSupplementalBalanceSheetInformationDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#LeasesScheduleofSupplementalBalanceSheetInformationDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/LeasesScheduleofSupplementalBalanceSheetInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7bbf-84c8-0790916cf775" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_01a03ec0-f913-7a40-949a-4e416b1248ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7bbf-84c8-0790916cf775" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_01a03ec0-f913-7a40-949a-4e416b1248ec" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_01a03ec0-f913-77ae-8e03-2e935af36bb9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_01a03ec0-f913-7a40-949a-4e416b1248ec" xlink:to="loc_srt_CounterpartyNameAxis_01a03ec0-f913-77ae-8e03-2e935af36bb9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_01a03ec0-f913-77ae-8e03-2e935af36bb9_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_01a03ec0-f913-77ae-8e03-2e935af36bb9" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_01a03ec0-f913-77ae-8e03-2e935af36bb9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_01a03ec0-f913-72b4-b91f-f72f0acb45f6" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_01a03ec0-f913-77ae-8e03-2e935af36bb9" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_01a03ec0-f913-72b4-b91f-f72f0acb45f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_MSGEntertainmentMember_01a03ec0-f913-7ed0-835b-d023168a8f08" xlink:href="msgk-20260930.xsd#msgk_MSGEntertainmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_01a03ec0-f913-72b4-b91f-f72f0acb45f6" xlink:to="loc_msgk_MSGEntertainmentMember_01a03ec0-f913-7ed0-835b-d023168a8f08" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_01a03ec0-f913-7bda-9b01-ab4ecc8221a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7bbf-84c8-0790916cf775" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_01a03ec0-f913-7bda-9b01-ab4ecc8221a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_01a03ec0-f913-7629-83ad-6ea3927b0804" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7bbf-84c8-0790916cf775" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_01a03ec0-f913-7629-83ad-6ea3927b0804" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_01a03ec0-f913-755b-afee-64d6100d6925" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7bbf-84c8-0790916cf775" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_01a03ec0-f913-755b-afee-64d6100d6925" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_01a03ec0-f913-743b-b57c-1a2f9e90ac87" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7bbf-84c8-0790916cf775" xlink:to="loc_us-gaap_OperatingLeaseLiability_01a03ec0-f913-743b-b57c-1a2f9e90ac87" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/LeasesScheduleofSupplementalIncomeStatementInformationDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#LeasesScheduleofSupplementalIncomeStatementInformationDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/LeasesScheduleofSupplementalIncomeStatementInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7d01-9f48-aa5e64099711" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_01a03ec0-f913-7a0f-a586-54911c297314" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7d01-9f48-aa5e64099711" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_01a03ec0-f913-7a0f-a586-54911c297314" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_01a03ec0-f913-75f6-83d9-a60d257afed0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfIncomeLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_01a03ec0-f913-7a0f-a586-54911c297314" xlink:to="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_01a03ec0-f913-75f6-83d9-a60d257afed0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_01a03ec0-f913-7e0a-b476-a120361446fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7d01-9f48-aa5e64099711" xlink:to="loc_us-gaap_OperatingLeaseCost_01a03ec0-f913-7e0a-b476-a120361446fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_01a03ec0-f913-77f5-8d69-fc63cf36f10f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7d01-9f48-aa5e64099711" xlink:to="loc_us-gaap_LeaseCost_01a03ec0-f913-77f5-8d69-fc63cf36f10f" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/LeasesScheduleofSupplementalIncomeStatementInformationDetails_1" xlink:type="simple" xlink:href="msgk-20260930.xsd#LeasesScheduleofSupplementalIncomeStatementInformationDetails_1"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/LeasesScheduleofSupplementalIncomeStatementInformationDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7d01-9f48-aa5e64099711" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_01a03ec0-f913-7a0f-a586-54911c297314" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7d01-9f48-aa5e64099711" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_01a03ec0-f913-7a0f-a586-54911c297314" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_01a03ec0-f913-7e0a-b476-a120361446fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7d01-9f48-aa5e64099711" xlink:to="loc_us-gaap_OperatingLeaseCost_01a03ec0-f913-7e0a-b476-a120361446fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_01a03ec0-f913-77f5-8d69-fc63cf36f10f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a03ec0-f913-7d01-9f48-aa5e64099711" xlink:to="loc_us-gaap_LeaseCost_01a03ec0-f913-77f5-8d69-fc63cf36f10f" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/GoodwillandIntangibleAssetsScheduleofIndefiniteLivedIntangibleAssetsDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#GoodwillandIntangibleAssetsScheduleofIndefiniteLivedIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/GoodwillandIntangibleAssetsScheduleofIndefiniteLivedIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_01a03ec0-f913-74da-bcbd-19caf048b9d4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_01a03ec0-f913-7fdc-8f05-84b5e12030bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_01a03ec0-f913-74da-bcbd-19caf048b9d4" xlink:to="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_01a03ec0-f913-7fdc-8f05-84b5e12030bd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_01a03ec0-f913-7796-b521-cd4d5afdd883" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_01a03ec0-f913-7fdc-8f05-84b5e12030bd" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_01a03ec0-f913-7796-b521-cd4d5afdd883" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_01a03ec0-f913-7796-b521-cd4d5afdd883_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_01a03ec0-f913-7796-b521-cd4d5afdd883" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_01a03ec0-f913-7796-b521-cd4d5afdd883_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_01a03ec0-f913-7f08-b91c-6cce3a188df1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_01a03ec0-f913-7796-b521-cd4d5afdd883" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_01a03ec0-f913-7f08-b91c-6cce3a188df1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchiseRightsMember_01a03ec0-f913-7f80-8bf1-32f2a63e6575" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FranchiseRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_01a03ec0-f913-7f08-b91c-6cce3a188df1" xlink:to="loc_us-gaap_FranchiseRightsMember_01a03ec0-f913-7f80-8bf1-32f2a63e6575" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ArtisticRelatedIntangibleAssetsMember_01a03ec0-f913-75fd-b8c0-8d4e82211c09" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ArtisticRelatedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_01a03ec0-f913-7f08-b91c-6cce3a188df1" xlink:to="loc_us-gaap_ArtisticRelatedIntangibleAssetsMember_01a03ec0-f913-75fd-b8c0-8d4e82211c09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_01a03ec0-f913-72c0-af49-351277f5f624" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_01a03ec0-f913-74da-bcbd-19caf048b9d4" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_01a03ec0-f913-72c0-af49-351277f5f624" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/InvestmentsScheduleofInvestmentsDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#InvestmentsScheduleofInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/InvestmentsScheduleofInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-777c-85b1-3567662e427f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_01a03ec0-f913-7365-8ee0-e7a7e9575aef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-777c-85b1-3567662e427f" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_01a03ec0-f913-7365-8ee0-e7a7e9575aef" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f913-7257-b11b-fcf9b8322ad7" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_01a03ec0-f913-7365-8ee0-e7a7e9575aef" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f913-7257-b11b-fcf9b8322ad7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-7257-b11b-fcf9b8322ad7_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f913-7257-b11b-fcf9b8322ad7" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-7257-b11b-fcf9b8322ad7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-73bd-a8dd-89f29879b386" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f913-7257-b11b-fcf9b8322ad7" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-73bd-a8dd-89f29879b386" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_HardCarryGamingInc.HCGMember_01a03ec0-f913-704f-b32f-47f55a2f0a5c" xlink:href="msgk-20260930.xsd#msgk_HardCarryGamingInc.HCGMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-73bd-a8dd-89f29879b386" xlink:to="loc_msgk_HardCarryGamingInc.HCGMember_01a03ec0-f913-704f-b32f-47f55a2f0a5c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_MSGNetworksMember_01a03ec0-f913-7fdf-af4d-bb7acf03a7ce" xlink:href="msgk-20260930.xsd#msgk_MSGNetworksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-73bd-a8dd-89f29879b386" xlink:to="loc_msgk_MSGNetworksMember_01a03ec0-f913-7fdf-af4d-bb7acf03a7ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_OtherEquityMethodInvestmentsMember_01a03ec0-f913-77cc-9afd-1951223b6af9" xlink:href="msgk-20260930.xsd#msgk_OtherEquityMethodInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-73bd-a8dd-89f29879b386" xlink:to="loc_msgk_OtherEquityMethodInvestmentsMember_01a03ec0-f913-77cc-9afd-1951223b6af9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_XtractOneMember_01a03ec0-f913-7d38-a2d8-8964b314d4a8" xlink:href="msgk-20260930.xsd#msgk_XtractOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-73bd-a8dd-89f29879b386" xlink:to="loc_msgk_XtractOneMember_01a03ec0-f913-7d38-a2d8-8964b314d4a8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_OtherEquityInvestmentsMember_01a03ec0-f913-78ac-81eb-3263ebdc28d5" xlink:href="msgk-20260930.xsd#msgk_OtherEquityInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-73bd-a8dd-89f29879b386" xlink:to="loc_msgk_OtherEquityInvestmentsMember_01a03ec0-f913-78ac-81eb-3263ebdc28d5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_01a03ec0-f913-77ff-adb1-f99bf57d433a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-777c-85b1-3567662e427f" xlink:to="loc_us-gaap_EquityMethodInvestments_01a03ec0-f913-77ff-adb1-f99bf57d433a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent_01a03ec0-f913-7f2b-ad51-363509e77790" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-777c-85b1-3567662e427f" xlink:to="loc_us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent_01a03ec0-f913-7f2b-ad51-363509e77790" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount_01a03ec0-f913-7c39-9ea3-4aa90cb60b27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-777c-85b1-3567662e427f" xlink:to="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount_01a03ec0-f913-7c39-9ea3-4aa90cb60b27" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstanding_01a03ec0-f913-7dbe-ba5c-8fdb82360d68" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WarrantsAndRightsOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-777c-85b1-3567662e427f" xlink:to="loc_us-gaap_WarrantsAndRightsOutstanding_01a03ec0-f913-7dbe-ba5c-8fdb82360d68" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_01a03ec0-f913-76d0-a01a-a023a555bae5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Investments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-777c-85b1-3567662e427f" xlink:to="loc_us-gaap_Investments_01a03ec0-f913-76d0-a01a-a023a555bae5" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/InvestmentsScheduleofInvestmentsNarrativeDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#InvestmentsScheduleofInvestmentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/InvestmentsScheduleofInvestmentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a0a5b8-7514-74fd-98c1-7c8cda6b52a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_01a0a5b8-7514-7eed-80d4-0235582e732a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a0a5b8-7514-74fd-98c1-7c8cda6b52a1" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_01a0a5b8-7514-7eed-80d4-0235582e732a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a0a5b8-7514-7316-9a74-5ecd8e818868" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_01a0a5b8-7514-7eed-80d4-0235582e732a" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a0a5b8-7514-7316-9a74-5ecd8e818868" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_01a0a5b8-7514-7316-9a74-5ecd8e818868_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a0a5b8-7514-7316-9a74-5ecd8e818868" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_01a0a5b8-7514-7316-9a74-5ecd8e818868_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_01a0a5b8-7514-70fd-904a-e9e8ab4c8376" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a0a5b8-7514-7316-9a74-5ecd8e818868" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_01a0a5b8-7514-70fd-904a-e9e8ab4c8376" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_OtherEquityMethodInvestmentsMember_01a0a5b8-7514-770e-9484-82767252327b" xlink:href="msgk-20260930.xsd#msgk_OtherEquityMethodInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_01a0a5b8-7514-70fd-904a-e9e8ab4c8376" xlink:to="loc_msgk_OtherEquityMethodInvestmentsMember_01a0a5b8-7514-770e-9484-82767252327b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentsAndObservablePriceChanges_01a0a5b8-7514-7e84-b863-3636123da2ed" xlink:href="msgk-20260930.xsd#msgk_EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentsAndObservablePriceChanges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a0a5b8-7514-74fd-98c1-7c8cda6b52a1" xlink:to="loc_msgk_EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentsAndObservablePriceChanges_01a0a5b8-7514-7e84-b863-3636123da2ed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment_01a0a5b8-7514-7d48-9775-82bcaa9751c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a0a5b8-7514-74fd-98c1-7c8cda6b52a1" xlink:to="loc_us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment_01a0a5b8-7514-7d48-9775-82bcaa9751c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_01a169ae-8cd2-74fc-b271-ddbf9f0d550c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a0a5b8-7514-74fd-98c1-7c8cda6b52a1" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_01a169ae-8cd2-74fc-b271-ddbf9f0d550c" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/InvestmentsNarrativeDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#InvestmentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/InvestmentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-70bb-9a97-92ddecdb0c8a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_01a03ec0-f913-7e9e-8c87-20350b78c538" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-70bb-9a97-92ddecdb0c8a" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_01a03ec0-f913-7e9e-8c87-20350b78c538" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f913-706d-8c14-67a6f9ccec4f" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_01a03ec0-f913-7e9e-8c87-20350b78c538" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f913-706d-8c14-67a6f9ccec4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-706d-8c14-67a6f9ccec4f_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f913-706d-8c14-67a6f9ccec4f" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-706d-8c14-67a6f9ccec4f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-7fd3-94ce-81806f07fd06" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f913-706d-8c14-67a6f9ccec4f" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-7fd3-94ce-81806f07fd06" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_HardCarryGamingInc.HCGMember_01a03ec0-f913-7dc0-b1fb-cd2255a59f15" xlink:href="msgk-20260930.xsd#msgk_HardCarryGamingInc.HCGMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-7fd3-94ce-81806f07fd06" xlink:to="loc_msgk_HardCarryGamingInc.HCGMember_01a03ec0-f913-7dc0-b1fb-cd2255a59f15" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_MSGNetworksMember_01a03ec0-f913-7984-b890-e0f9d8cc3507" xlink:href="msgk-20260930.xsd#msgk_MSGNetworksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-7fd3-94ce-81806f07fd06" xlink:to="loc_msgk_MSGNetworksMember_01a03ec0-f913-7984-b890-e0f9d8cc3507" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_01a03ec0-f913-7e00-99ea-ff8bb78338f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-70bb-9a97-92ddecdb0c8a" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_01a03ec0-f913-7e00-99ea-ff8bb78338f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_01a03ec0-f913-7823-8e90-4006e7f4c7c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-70bb-9a97-92ddecdb0c8a" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_01a03ec0-f913-7823-8e90-4006e7f4c7c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_PennyWarrantsIssuedExercisablePercentageOfEquityInterests_01a03ec0-f913-7eb5-bbdc-074d6d4cafe1" xlink:href="msgk-20260930.xsd#msgk_PennyWarrantsIssuedExercisablePercentageOfEquityInterests"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-70bb-9a97-92ddecdb0c8a" xlink:to="loc_msgk_PennyWarrantsIssuedExercisablePercentageOfEquityInterests_01a03ec0-f913-7eb5-bbdc-074d6d4cafe1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment_01a14077-f3ea-781f-90b6-01aa0f03fcc7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-70bb-9a97-92ddecdb0c8a" xlink:to="loc_us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment_01a14077-f3ea-781f-90b6-01aa0f03fcc7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_01a03ec0-f913-7f2b-8ef7-ecb6460e4b38" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-70bb-9a97-92ddecdb0c8a" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_01a03ec0-f913-7f2b-8ef7-ecb6460e4b38" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_DeferredCompensationArrangementWithIndividualRemeasurementGainLossOfAssets_01a03ec0-f913-7d5c-999a-c1327c4d5b20" xlink:href="msgk-20260930.xsd#msgk_DeferredCompensationArrangementWithIndividualRemeasurementGainLossOfAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-70bb-9a97-92ddecdb0c8a" xlink:to="loc_msgk_DeferredCompensationArrangementWithIndividualRemeasurementGainLossOfAssets_01a03ec0-f913-7d5c-999a-c1327c4d5b20" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_PercentageOfEquityInterestsReceivedInExchangeForWarrantsExercisable_01a1ad50-0535-72ca-a700-690884c3ad80" xlink:href="msgk-20260930.xsd#msgk_PercentageOfEquityInterestsReceivedInExchangeForWarrantsExercisable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-70bb-9a97-92ddecdb0c8a" xlink:to="loc_msgk_PercentageOfEquityInterestsReceivedInExchangeForWarrantsExercisable_01a1ad50-0535-72ca-a700-690884c3ad80" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/InvestmentsScheduleofCostBasisandCarryingValueofEquityInvestmentswithReadilyDeterminableFairValuesDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#InvestmentsScheduleofCostBasisandCarryingValueofEquityInvestmentswithReadilyDeterminableFairValuesDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/InvestmentsScheduleofCostBasisandCarryingValueofEquityInvestmentswithReadilyDeterminableFairValuesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-7b98-b93f-9e300cf221bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_01a03ec0-f913-7add-8112-b2c0b99fe635" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-7b98-b93f-9e300cf221bf" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_01a03ec0-f913-7add-8112-b2c0b99fe635" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f913-7ee5-be08-999dab1e1a3c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_01a03ec0-f913-7add-8112-b2c0b99fe635" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f913-7ee5-be08-999dab1e1a3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-7ee5-be08-999dab1e1a3c_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f913-7ee5-be08-999dab1e1a3c" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-7ee5-be08-999dab1e1a3c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-7cc2-9254-37a63286da4c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f913-7ee5-be08-999dab1e1a3c" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-7cc2-9254-37a63286da4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_XtractOneMember_01a03ec0-f913-712b-abf4-64bec1a19427" xlink:href="msgk-20260930.xsd#msgk_XtractOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-7cc2-9254-37a63286da4c" xlink:to="loc_msgk_XtractOneMember_01a03ec0-f913-712b-abf4-64bec1a19427" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_OtherEquityInvestmentsMember_01a03ec0-f913-766d-925e-1435f79b7089" xlink:href="msgk-20260930.xsd#msgk_OtherEquityInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f913-7cc2-9254-37a63286da4c" xlink:to="loc_msgk_OtherEquityInvestmentsMember_01a03ec0-f913-766d-925e-1435f79b7089" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiCost_01a03ec0-f913-7317-8b5f-a15dfe1e03ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNiCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-7b98-b93f-9e300cf221bf" xlink:to="loc_us-gaap_EquitySecuritiesFvNiCost_01a03ec0-f913-7317-8b5f-a15dfe1e03ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent_01a03ec0-f913-753b-a28f-9442df9478e5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f913-7b98-b93f-9e300cf221bf" xlink:to="loc_us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent_01a03ec0-f913-753b-a28f-9442df9478e5" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/InvestmentsScheduleofRealizedandUnrealizedGainsLossesonEquityInvestmentswithReadilyDeterminableFairValuesDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#InvestmentsScheduleofRealizedandUnrealizedGainsLossesonEquityInvestmentswithReadilyDeterminableFairValuesDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/InvestmentsScheduleofRealizedandUnrealizedGainsLossesonEquityInvestmentswithReadilyDeterminableFairValuesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f914-7ba0-a88a-58b9ceeaa782" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_01a03ec0-f914-71ed-aa5a-e4c2fdaf5c67" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f914-7ba0-a88a-58b9ceeaa782" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_01a03ec0-f914-71ed-aa5a-e4c2fdaf5c67" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f914-7976-9f0a-326fd082ef44" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_01a03ec0-f914-71ed-aa5a-e4c2fdaf5c67" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f914-7976-9f0a-326fd082ef44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f914-7976-9f0a-326fd082ef44_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f914-7976-9f0a-326fd082ef44" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f914-7976-9f0a-326fd082ef44_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f914-7403-9fc6-95196601d8a9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f914-7976-9f0a-326fd082ef44" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f914-7403-9fc6-95196601d8a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_XtractOneMember_01a03ec0-f914-7f56-a17c-29b70d903abb" xlink:href="msgk-20260930.xsd#msgk_XtractOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f914-7403-9fc6-95196601d8a9" xlink:to="loc_msgk_XtractOneMember_01a03ec0-f914-7f56-a17c-29b70d903abb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_OtherEquityInvestmentsMember_01a03ec0-f914-7fe2-b7e2-680874f38b87" xlink:href="msgk-20260930.xsd#msgk_OtherEquityInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f914-7403-9fc6-95196601d8a9" xlink:to="loc_msgk_OtherEquityInvestmentsMember_01a03ec0-f914-7fe2-b7e2-680874f38b87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_01a03ec0-f914-7ad3-92df-19d1fffc315c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_01a03ec0-f914-7ba0-a88a-58b9ceeaa782" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_01a03ec0-f914-7ad3-92df-19d1fffc315c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/FairValueMeasurementsScheduleofFairValueAssetsMeasuredonRecurringBasisDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#FairValueMeasurementsScheduleofFairValueAssetsMeasuredonRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/FairValueMeasurementsScheduleofFairValueAssetsMeasuredonRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01a03ec0-f914-7217-87ad-0ab86850b8c4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_01a03ec0-f914-759e-b4c3-24b787c01c54" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01a03ec0-f914-7217-87ad-0ab86850b8c4" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_01a03ec0-f914-759e-b4c3-24b787c01c54" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_01a03ec0-f914-7a76-8e5e-0015a72b8598" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_01a03ec0-f914-759e-b4c3-24b787c01c54" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_01a03ec0-f914-7a76-8e5e-0015a72b8598" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a03ec0-f914-7a76-8e5e-0015a72b8598_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_01a03ec0-f914-7a76-8e5e-0015a72b8598" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a03ec0-f914-7a76-8e5e-0015a72b8598_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a03ec0-f914-7d77-ab16-e8e1ae99ab08" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_01a03ec0-f914-7a76-8e5e-0015a72b8598" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a03ec0-f914-7d77-ab16-e8e1ae99ab08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_01a03ec0-f914-7101-97f5-db95328fa217" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a03ec0-f914-7d77-ab16-e8e1ae99ab08" xlink:to="loc_us-gaap_MoneyMarketFundsMember_01a03ec0-f914-7101-97f5-db95328fa217" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BankTimeDepositsMember_01a03ec0-f914-7386-aca2-7dc4f2ee0276" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BankTimeDepositsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a03ec0-f914-7d77-ab16-e8e1ae99ab08" xlink:to="loc_us-gaap_BankTimeDepositsMember_01a03ec0-f914-7386-aca2-7dc4f2ee0276" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_01a03ec0-f914-7d68-92cc-b501be067b3a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a03ec0-f914-7d77-ab16-e8e1ae99ab08" xlink:to="loc_us-gaap_EquitySecuritiesMember_01a03ec0-f914-7d68-92cc-b501be067b3a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_01a03ec0-f914-7b2e-bd16-c731cb95b7d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a03ec0-f914-7d77-ab16-e8e1ae99ab08" xlink:to="loc_us-gaap_WarrantMember_01a03ec0-f914-7b2e-bd16-c731cb95b7d3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_01a03ec0-f914-7175-afcb-46e4eb6f389c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_01a03ec0-f914-759e-b4c3-24b787c01c54" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_01a03ec0-f914-7175-afcb-46e4eb6f389c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a03ec0-f914-7175-afcb-46e4eb6f389c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_01a03ec0-f914-7175-afcb-46e4eb6f389c" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a03ec0-f914-7175-afcb-46e4eb6f389c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a03ec0-f914-71f3-b0ae-616b02ba37da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_01a03ec0-f914-7175-afcb-46e4eb6f389c" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a03ec0-f914-71f3-b0ae-616b02ba37da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_01a03ec0-f914-7c9e-b58a-63d992f7ec4a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a03ec0-f914-71f3-b0ae-616b02ba37da" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_01a03ec0-f914-7c9e-b58a-63d992f7ec4a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_01a03ec0-f914-74b6-bdf4-a010da0e965b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a03ec0-f914-71f3-b0ae-616b02ba37da" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_01a03ec0-f914-74b6-bdf4-a010da0e965b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_01a03ec0-f914-78ea-b491-9e35c7ac2115" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01a03ec0-f914-7217-87ad-0ab86850b8c4" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_01a03ec0-f914-78ea-b491-9e35c7ac2115" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/FairValueMeasurementsScheduleofKeyAssumptionsUsedtoCalculatetheFairValueofWarrantsDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#FairValueMeasurementsScheduleofKeyAssumptionsUsedtoCalculatetheFairValueofWarrantsDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/FairValueMeasurementsScheduleofKeyAssumptionsUsedtoCalculatetheFairValueofWarrantsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_01a03ec0-f914-711f-9da0-a18f8993860c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_01a03ec0-f914-74b6-a203-b1769a61055d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_01a03ec0-f914-711f-9da0-a18f8993860c" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_01a03ec0-f914-74b6-a203-b1769a61055d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_01a03ec0-f914-7e24-9dee-dfe6c15bcb8b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_01a03ec0-f914-74b6-a203-b1769a61055d" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_01a03ec0-f914-7e24-9dee-dfe6c15bcb8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a03ec0-f914-7e24-9dee-dfe6c15bcb8b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_01a03ec0-f914-7e24-9dee-dfe6c15bcb8b" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a03ec0-f914-7e24-9dee-dfe6c15bcb8b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a03ec0-f914-7726-ab96-f1f41fe4b6f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_01a03ec0-f914-7e24-9dee-dfe6c15bcb8b" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a03ec0-f914-7726-ab96-f1f41fe4b6f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_01a03ec0-f914-7e79-806e-b2b0ce4e4358" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a03ec0-f914-7726-ab96-f1f41fe4b6f5" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_01a03ec0-f914-7e79-806e-b2b0ce4e4358" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_01a03ec0-f914-7239-8c47-058a816976f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_01a03ec0-f914-74b6-a203-b1769a61055d" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_01a03ec0-f914-7239-8c47-058a816976f9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_01a03ec0-f914-7239-8c47-058a816976f9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_01a03ec0-f914-7239-8c47-058a816976f9" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_01a03ec0-f914-7239-8c47-058a816976f9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_01a03ec0-f914-7db8-a287-361886f0267c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_01a03ec0-f914-7239-8c47-058a816976f9" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_01a03ec0-f914-7db8-a287-361886f0267c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputExpectedTermMember_01a03ec0-f914-7a1e-8296-28cd6ff50814" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputExpectedTermMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_01a03ec0-f914-7db8-a287-361886f0267c" xlink:to="loc_us-gaap_MeasurementInputExpectedTermMember_01a03ec0-f914-7a1e-8296-28cd6ff50814" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputPriceVolatilityMember_01a03ec0-f914-7cd7-8c64-9d37cc3018f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputPriceVolatilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_01a03ec0-f914-7db8-a287-361886f0267c" xlink:to="loc_us-gaap_MeasurementInputPriceVolatilityMember_01a03ec0-f914-7cd7-8c64-9d37cc3018f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_01a03ec0-f914-7609-a24f-cb8ba991d9b3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputRiskFreeInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_01a03ec0-f914-7db8-a287-361886f0267c" xlink:to="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_01a03ec0-f914-7609-a24f-cb8ba991d9b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstandingTerm_01a03ec0-f914-790b-9c06-95a2f6d4dde1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WarrantsAndRightsOutstandingTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_01a03ec0-f914-711f-9da0-a18f8993860c" xlink:to="loc_us-gaap_WarrantsAndRightsOutstandingTerm_01a03ec0-f914-790b-9c06-95a2f6d4dde1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstandingMeasurementInput_01a03ec0-f914-7266-a6bd-8e5cfb58868a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WarrantsAndRightsOutstandingMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_01a03ec0-f914-711f-9da0-a18f8993860c" xlink:to="loc_us-gaap_WarrantsAndRightsOutstandingMeasurementInput_01a03ec0-f914-7266-a6bd-8e5cfb58868a" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/FairValueMeasurementsScheduleofAdditionalInformationofAssetsofLevelIIIInputsDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#FairValueMeasurementsScheduleofAdditionalInformationofAssetsofLevelIIIInputsDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/FairValueMeasurementsScheduleofAdditionalInformationofAssetsofLevelIIIInputsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_01a0a5aa-4ba2-7f50-ab5e-614a29d9b5bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_01a0a5aa-4ba2-71e6-a51d-e7a5624bc26b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_01a0a5aa-4ba2-7f50-ab5e-614a29d9b5bd" xlink:to="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_01a0a5aa-4ba2-71e6-a51d-e7a5624bc26b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_01a0a5aa-4ba2-785c-aecd-ce37c72492fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_01a0a5aa-4ba2-71e6-a51d-e7a5624bc26b" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_01a0a5aa-4ba2-785c-aecd-ce37c72492fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a0a5aa-4ba2-785c-aecd-ce37c72492fa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_01a0a5aa-4ba2-785c-aecd-ce37c72492fa" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a0a5aa-4ba2-785c-aecd-ce37c72492fa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a0a5aa-4ba2-7ce1-9277-3c185c347ae0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_01a0a5aa-4ba2-785c-aecd-ce37c72492fa" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a0a5aa-4ba2-7ce1-9277-3c185c347ae0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_01a0a5aa-4ba2-7877-8c7c-0fb62a19f669" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_01a0a5aa-4ba2-7ce1-9277-3c185c347ae0" xlink:to="loc_us-gaap_WarrantMember_01a0a5aa-4ba2-7877-8c7c-0fb62a19f669" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_01a03ec0-f914-76b3-b5a8-39ddc52ef1f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_01a0a5aa-4ba2-7f50-ab5e-614a29d9b5bd" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_01a03ec0-f914-76b3-b5a8-39ddc52ef1f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_01a03ec0-f914-74cd-ac72-1c581148c790" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_01a03ec0-f914-76b3-b5a8-39ddc52ef1f3" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_01a03ec0-f914-74cd-ac72-1c581148c790" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_01a03ec0-f914-76e6-8a7d-3b77b0a8490b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_01a03ec0-f914-76b3-b5a8-39ddc52ef1f3" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_01a03ec0-f914-76e6-8a7d-3b77b0a8490b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_01a03ec0-f914-7394-9edc-13eb5db42f81" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/FairValueMeasurementsScheduleofCarryingValueandFairValueofDebtDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#FairValueMeasurementsScheduleofCarryingValueandFairValueofDebtDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/FairValueMeasurementsScheduleofCarryingValueandFairValueofDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_msgk_ScheduleOfFinancialInstrumentsLineItems_01a03ec0-f914-71d1-807a-9a2138a4eabc" xlink:href="msgk-20260930.xsd#msgk_ScheduleOfFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_ScheduleOfFinancialInstrumentsTable_01a03ec0-f914-70f0-99be-41fd174742c9" xlink:href="msgk-20260930.xsd#msgk_ScheduleOfFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_msgk_ScheduleOfFinancialInstrumentsLineItems_01a03ec0-f914-71d1-807a-9a2138a4eabc" xlink:to="loc_msgk_ScheduleOfFinancialInstrumentsTable_01a03ec0-f914-70f0-99be-41fd174742c9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_01a03ec0-f914-780f-bd1a-9863946d2316" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_msgk_ScheduleOfFinancialInstrumentsTable_01a03ec0-f914-70f0-99be-41fd174742c9" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_01a03ec0-f914-780f-bd1a-9863946d2316" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_01a03ec0-f914-780f-bd1a-9863946d2316_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_01a03ec0-f914-780f-bd1a-9863946d2316" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_01a03ec0-f914-780f-bd1a-9863946d2316_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_01a03ec0-f914-775a-a68b-a6d261e970bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_01a03ec0-f914-780f-bd1a-9863946d2316" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_01a03ec0-f914-775a-a68b-a6d261e970bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_01a03ec0-f914-7de1-816f-4eabb1f26346" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_01a03ec0-f914-775a-a68b-a6d261e970bd" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_01a03ec0-f914-7de1-816f-4eabb1f26346" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_01a03ec0-f914-74e4-ac74-f992c060995a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_01a03ec0-f914-7de1-816f-4eabb1f26346" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_01a03ec0-f914-74e4-ac74-f992c060995a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_01a03ec0-f914-76b1-9205-a53abb5b093c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_01a03ec0-f914-7de1-816f-4eabb1f26346" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_01a03ec0-f914-76b1-9205-a53abb5b093c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShorttermDebtFairValue_01a03ec0-f914-770e-a789-2285d6b15792" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShorttermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_msgk_ScheduleOfFinancialInstrumentsLineItems_01a03ec0-f914-71d1-807a-9a2138a4eabc" xlink:to="loc_us-gaap_ShorttermDebtFairValue_01a03ec0-f914-770e-a789-2285d6b15792" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_01a03ec0-f914-7d1f-8056-c969a5430f5e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_msgk_ScheduleOfFinancialInstrumentsLineItems_01a03ec0-f914-71d1-807a-9a2138a4eabc" xlink:to="loc_us-gaap_LongTermDebtFairValue_01a03ec0-f914-7d1f-8056-c969a5430f5e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/DebtKnicksandRangersRevolvingCreditFacilitiesNarrativeDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#DebtKnicksandRangersRevolvingCreditFacilitiesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/DebtKnicksandRangersRevolvingCreditFacilitiesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_01a03ec0-f914-749a-88e5-66ee6ff92f3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_01a03ec0-f914-749a-88e5-66ee6ff92f3c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_01a03ec0-f914-74a7-a53d-9913edd534fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_01a03ec0-f914-749a-88e5-66ee6ff92f3c" xlink:to="loc_us-gaap_CreditFacilityAxis_01a03ec0-f914-74a7-a53d-9913edd534fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_01a03ec0-f914-74a7-a53d-9913edd534fa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_01a03ec0-f914-74a7-a53d-9913edd534fa" xlink:to="loc_us-gaap_CreditFacilityDomain_01a03ec0-f914-74a7-a53d-9913edd534fa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_01a03ec0-f914-7b98-8ecf-36d2f20c0fdf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_01a03ec0-f914-74a7-a53d-9913edd534fa" xlink:to="loc_us-gaap_CreditFacilityDomain_01a03ec0-f914-7b98-8ecf-36d2f20c0fdf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_01a03ec0-f914-79c6-8d90-ef3d083f6183" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_01a03ec0-f914-7b98-8ecf-36d2f20c0fdf" xlink:to="loc_us-gaap_SecuredDebtMember_01a03ec0-f914-79c6-8d90-ef3d083f6183" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_01a03ec0-f914-72df-a97c-c36cda4c99c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_01a03ec0-f914-749a-88e5-66ee6ff92f3c" xlink:to="loc_us-gaap_DebtInstrumentAxis_01a03ec0-f914-72df-a97c-c36cda4c99c8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_01a03ec0-f914-72df-a97c-c36cda4c99c8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_01a03ec0-f914-72df-a97c-c36cda4c99c8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_01a03ec0-f914-72df-a97c-c36cda4c99c8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_01a03ec0-f914-710d-be3f-74d765b9e518" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_01a03ec0-f914-72df-a97c-c36cda4c99c8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_01a03ec0-f914-710d-be3f-74d765b9e518" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_A2016KnicksRevolvingCreditFacilityMember_01a03ec0-f914-73f6-b376-8e54433a4d43" xlink:href="msgk-20260930.xsd#msgk_A2016KnicksRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_01a03ec0-f914-710d-be3f-74d765b9e518" xlink:to="loc_msgk_A2016KnicksRevolvingCreditFacilityMember_01a03ec0-f914-73f6-b376-8e54433a4d43" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_KnicksRevolvingCreditFacilityMember_01a03ec0-f914-72b2-ad27-0439c86caab8" xlink:href="msgk-20260930.xsd#msgk_KnicksRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_01a03ec0-f914-710d-be3f-74d765b9e518" xlink:to="loc_msgk_KnicksRevolvingCreditFacilityMember_01a03ec0-f914-72b2-ad27-0439c86caab8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_A2017RangersRevolvingCreditFacilityMember_01a03ec0-f914-770c-a854-5b71e4a6fc11" xlink:href="msgk-20260930.xsd#msgk_A2017RangersRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_01a03ec0-f914-710d-be3f-74d765b9e518" xlink:to="loc_msgk_A2017RangersRevolvingCreditFacilityMember_01a03ec0-f914-770c-a854-5b71e4a6fc11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_RangersRevolvingCreditFacilityMember_01a03ec0-f914-74ba-b21c-9bedb5dca616" xlink:href="msgk-20260930.xsd#msgk_RangersRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_01a03ec0-f914-710d-be3f-74d765b9e518" xlink:to="loc_msgk_RangersRevolvingCreditFacilityMember_01a03ec0-f914-74ba-b21c-9bedb5dca616" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_01a03ec0-f914-736a-9596-709a3ce10cfa" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_01a03ec0-f914-749a-88e5-66ee6ff92f3c" xlink:to="loc_dei_LegalEntityAxis_01a03ec0-f914-736a-9596-709a3ce10cfa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_01a03ec0-f914-736a-9596-709a3ce10cfa_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_01a03ec0-f914-736a-9596-709a3ce10cfa" xlink:to="loc_dei_EntityDomain_01a03ec0-f914-736a-9596-709a3ce10cfa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_01a03ec0-f914-7807-92eb-a456f69ea28c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_01a03ec0-f914-736a-9596-709a3ce10cfa" xlink:to="loc_dei_EntityDomain_01a03ec0-f914-7807-92eb-a456f69ea28c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_KnicksMember_01a03ec0-f914-71d3-859f-c1b97ad62ca5" xlink:href="msgk-20260930.xsd#msgk_KnicksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_01a03ec0-f914-7807-92eb-a456f69ea28c" xlink:to="loc_msgk_KnicksMember_01a03ec0-f914-71d3-859f-c1b97ad62ca5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_RangersMember_01a03ec0-f914-7a80-8338-308f306ab4b5" xlink:href="msgk-20260930.xsd#msgk_RangersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_01a03ec0-f914-7807-92eb-a456f69ea28c" xlink:to="loc_msgk_RangersMember_01a03ec0-f914-7a80-8338-308f306ab4b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_01a03ec0-f914-7066-af0c-c94f3e6b70d7" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_01a03ec0-f914-749a-88e5-66ee6ff92f3c" xlink:to="loc_srt_RangeAxis_01a03ec0-f914-7066-af0c-c94f3e6b70d7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_01a03ec0-f914-7066-af0c-c94f3e6b70d7_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_01a03ec0-f914-7066-af0c-c94f3e6b70d7" xlink:to="loc_srt_RangeMember_01a03ec0-f914-7066-af0c-c94f3e6b70d7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_01a03ec0-f914-7795-a12f-f5e5e8ba8164" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_01a03ec0-f914-7066-af0c-c94f3e6b70d7" xlink:to="loc_srt_RangeMember_01a03ec0-f914-7795-a12f-f5e5e8ba8164" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_01a03ec0-f914-793a-9a3e-42c9b4dbc436" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_01a03ec0-f914-7795-a12f-f5e5e8ba8164" xlink:to="loc_srt_MinimumMember_01a03ec0-f914-793a-9a3e-42c9b4dbc436" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_01a03ec0-f914-7ecb-a946-ad98a658f036" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_01a03ec0-f914-7795-a12f-f5e5e8ba8164" xlink:to="loc_srt_MaximumMember_01a03ec0-f914-7ecb-a946-ad98a658f036" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_01a03ec0-f914-7374-b4a5-d4149fad39c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_01a03ec0-f914-749a-88e5-66ee6ff92f3c" xlink:to="loc_us-gaap_VariableRateAxis_01a03ec0-f914-7374-b4a5-d4149fad39c6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_01a03ec0-f914-7374-b4a5-d4149fad39c6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_01a03ec0-f914-7374-b4a5-d4149fad39c6" xlink:to="loc_us-gaap_VariableRateDomain_01a03ec0-f914-7374-b4a5-d4149fad39c6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_01a03ec0-f914-72ae-91ce-6d99d93bfaea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_01a03ec0-f914-7374-b4a5-d4149fad39c6" xlink:to="loc_us-gaap_VariableRateDomain_01a03ec0-f914-72ae-91ce-6d99d93bfaea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_01a03ec0-f914-73a3-bdcf-16cd5d876850" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_01a03ec0-f914-72ae-91ce-6d99d93bfaea" xlink:to="loc_us-gaap_BaseRateMember_01a03ec0-f914-73a3-bdcf-16cd5d876850" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_01a03ec0-f914-71a9-b890-9aad5a06738e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredOvernightFinancingRateSofrMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_01a03ec0-f914-72ae-91ce-6d99d93bfaea" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_01a03ec0-f914-71a9-b890-9aad5a06738e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_01a167f0-8a79-77f6-84cb-3b82c9a685a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_01a03ec0-f914-749a-88e5-66ee6ff92f3c" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_01a167f0-8a79-77f6-84cb-3b82c9a685a5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_01a167f0-8a79-77f6-84cb-3b82c9a685a5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_01a167f0-8a79-77f6-84cb-3b82c9a685a5" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_01a167f0-8a79-77f6-84cb-3b82c9a685a5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_01a167f0-8a79-7036-8560-a9fa575b1377" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_01a167f0-8a79-77f6-84cb-3b82c9a685a5" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_01a167f0-8a79-7036-8560-a9fa575b1377" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_01a167f1-1b53-7883-bbce-416c3a89417c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_01a167f0-8a79-7036-8560-a9fa575b1377" xlink:to="loc_us-gaap_SubsequentEventMember_01a167f1-1b53-7883-bbce-416c3a89417c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_01a03ec0-f914-7288-b86a-0136767999b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_01a03ec0-f914-7288-b86a-0136767999b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_01a03ec0-f914-7183-8b4d-e3888cbcdcdc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_us-gaap_DebtInstrumentTerm_01a03ec0-f914-7183-8b4d-e3888cbcdcdc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_01a03ec0-f914-7a78-b127-d78eeb809d01" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_01a03ec0-f914-7a78-b127-d78eeb809d01" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_DebtInstrumentCreditSpreadAdjustmentSOFR_01a03ec0-f914-78c2-ad96-7fdce3e5554c" xlink:href="msgk-20260930.xsd#msgk_DebtInstrumentCreditSpreadAdjustmentSOFR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_msgk_DebtInstrumentCreditSpreadAdjustmentSOFR_01a03ec0-f914-78c2-ad96-7fdce3e5554c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_01a03ec0-f914-734b-b4bd-fd5e60fc3a0a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_01a03ec0-f914-734b-b4bd-fd5e60fc3a0a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLinesOfCredit_01a09d7d-a108-75e1-91fe-e1de21067d49" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_us-gaap_ProceedsFromLinesOfCredit_01a09d7d-a108-75e1-91fe-e1de21067d49" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_01a03ec0-f914-7a22-b59a-58822da168a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_01a03ec0-f914-7a22-b59a-58822da168a7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtPercentageBearingVariableInterestRate_01a03ec0-f914-7671-8f2b-68f5e2cdfe75" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtPercentageBearingVariableInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_us-gaap_LongTermDebtPercentageBearingVariableInterestRate_01a03ec0-f914-7671-8f2b-68f5e2cdfe75" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentPeriodicPaymentInterest_01a03ec0-f914-7cab-924e-19c1d115c51c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentPeriodicPaymentInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_us-gaap_DebtInstrumentPeriodicPaymentInterest_01a03ec0-f914-7cab-924e-19c1d115c51c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCollateral_01a03ec0-f914-7fe2-846f-9fb1f5a55abb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_us-gaap_DebtInstrumentCollateral_01a03ec0-f914-7fe2-846f-9fb1f5a55abb" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentSubjectiveAccelerationClause_01a03ec0-f914-7cd8-b271-5f3b2fb375f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentSubjectiveAccelerationClause"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_us-gaap_DebtInstrumentSubjectiveAccelerationClause_01a03ec0-f914-7cd8-b271-5f3b2fb375f8" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_DebtInstrumentCovenantMandatoryPrepaymentClauseThresholdOfQualifiedRevenues_01a03ec0-f914-7635-9cd9-ac91c2ed2301" xlink:href="msgk-20260930.xsd#msgk_DebtInstrumentCovenantMandatoryPrepaymentClauseThresholdOfQualifiedRevenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_msgk_DebtInstrumentCovenantMandatoryPrepaymentClauseThresholdOfQualifiedRevenues_01a03ec0-f914-7635-9cd9-ac91c2ed2301" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRestrictiveCovenants_01a03ec0-f914-7b71-838d-1d9b9438a247" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRestrictiveCovenants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_us-gaap_DebtInstrumentRestrictiveCovenants_01a03ec0-f914-7b71-838d-1d9b9438a247" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_DebtInstrumentDebtServiceRatio_01a03ec0-f914-7312-9068-014ca7bb69cc" xlink:href="msgk-20260930.xsd#msgk_DebtInstrumentDebtServiceRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_msgk_DebtInstrumentDebtServiceRatio_01a03ec0-f914-7312-9068-014ca7bb69cc" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_DebtInstrumentDebtServiceRatioTermsNumberOfTrailingQuarters_01a03ec0-f914-7f7c-b001-81ac7055e0c1" xlink:href="msgk-20260930.xsd#msgk_DebtInstrumentDebtServiceRatioTermsNumberOfTrailingQuarters"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_msgk_DebtInstrumentDebtServiceRatioTermsNumberOfTrailingQuarters_01a03ec0-f914-7f7c-b001-81ac7055e0c1" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCovenantCompliance_01a03ec0-f914-7062-8497-743821f0b6e7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentCovenantCompliance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_us-gaap_DebtInstrumentCovenantCompliance_01a03ec0-f914-7062-8497-743821f0b6e7" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_DebtInstrumentQualifiedRevenuesThresholdPercentageOfAvailableCreditFacility_01a03ec0-f914-711b-b76a-111906192316" xlink:href="msgk-20260930.xsd#msgk_DebtInstrumentQualifiedRevenuesThresholdPercentageOfAvailableCreditFacility"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a03ec0-f914-7cc8-83a8-f4b890da6ee1" xlink:to="loc_msgk_DebtInstrumentQualifiedRevenuesThresholdPercentageOfAvailableCreditFacility_01a03ec0-f914-711b-b76a-111906192316" xlink:type="arc" order="16"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/DebtRangersNHLAdvanceAgreementNarrativeDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#DebtRangersNHLAdvanceAgreementNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/DebtRangersNHLAdvanceAgreementNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_01a03ec0-f914-7999-a881-bdf2ad32e990" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_01a03ec0-f914-75b2-af31-14b600e69e2f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_01a03ec0-f914-7999-a881-bdf2ad32e990" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_01a03ec0-f914-75b2-af31-14b600e69e2f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_01a03ec0-f914-77fc-8569-17056d910a28" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_01a03ec0-f914-75b2-af31-14b600e69e2f" xlink:to="loc_us-gaap_DebtInstrumentAxis_01a03ec0-f914-77fc-8569-17056d910a28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_01a03ec0-f914-77fc-8569-17056d910a28_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_01a03ec0-f914-77fc-8569-17056d910a28" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_01a03ec0-f914-77fc-8569-17056d910a28_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_01a03ec0-f914-7469-810a-49b429d21144" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_01a03ec0-f914-77fc-8569-17056d910a28" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_01a03ec0-f914-7469-810a-49b429d21144" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_A2021RangersNHLAdvanceMember_01a03ec0-f914-70be-ba5c-fff5d9600f44" xlink:href="msgk-20260930.xsd#msgk_A2021RangersNHLAdvanceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_01a03ec0-f914-7469-810a-49b429d21144" xlink:to="loc_msgk_A2021RangersNHLAdvanceMember_01a03ec0-f914-70be-ba5c-fff5d9600f44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_01a03ec0-f914-778e-89c4-dc56ed10cc98" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_01a03ec0-f914-75b2-af31-14b600e69e2f" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_01a03ec0-f914-778e-89c4-dc56ed10cc98" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_01a03ec0-f914-778e-89c4-dc56ed10cc98_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_01a03ec0-f914-778e-89c4-dc56ed10cc98" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_01a03ec0-f914-778e-89c4-dc56ed10cc98_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_01a03ec0-f914-7375-959d-328d08951c73" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_01a03ec0-f914-778e-89c4-dc56ed10cc98" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_01a03ec0-f914-7375-959d-328d08951c73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_01a03ec0-f914-7509-8a84-1bcd2e8a4bf9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_01a03ec0-f914-7375-959d-328d08951c73" xlink:to="loc_us-gaap_SecuredDebtMember_01a03ec0-f914-7509-8a84-1bcd2e8a4bf9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_01a03ec0-f914-7e8c-ba17-226d724508fd" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_01a03ec0-f914-75b2-af31-14b600e69e2f" xlink:to="loc_dei_LegalEntityAxis_01a03ec0-f914-7e8c-ba17-226d724508fd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_01a03ec0-f914-7e8c-ba17-226d724508fd_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_01a03ec0-f914-7e8c-ba17-226d724508fd" xlink:to="loc_dei_EntityDomain_01a03ec0-f914-7e8c-ba17-226d724508fd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_01a03ec0-f914-7557-90df-1841ae24ebe5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_01a03ec0-f914-7e8c-ba17-226d724508fd" xlink:to="loc_dei_EntityDomain_01a03ec0-f914-7557-90df-1841ae24ebe5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_RangersMember_01a03ec0-f914-7c97-b475-ccc6e9f0ad17" xlink:href="msgk-20260930.xsd#msgk_RangersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_01a03ec0-f914-7557-90df-1841ae24ebe5" xlink:to="loc_msgk_RangersMember_01a03ec0-f914-7c97-b475-ccc6e9f0ad17" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_ShortTermDebtMaximumCapacity_01a03ec0-f914-7fc6-8c19-b4e21de1a57a" xlink:href="msgk-20260930.xsd#msgk_ShortTermDebtMaximumCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_01a03ec0-f914-7999-a881-bdf2ad32e990" xlink:to="loc_msgk_ShortTermDebtMaximumCapacity_01a03ec0-f914-7fc6-8c19-b4e21de1a57a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtPercentageBearingFixedInterestRate_01a03ec0-f914-799f-971a-91328abdc288" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtPercentageBearingFixedInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_01a03ec0-f914-7999-a881-bdf2ad32e990" xlink:to="loc_us-gaap_ShortTermDebtPercentageBearingFixedInterestRate_01a03ec0-f914-799f-971a-91328abdc288" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTerms_01a03ec0-f914-7b45-a2b3-f9b1ce65194a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTerms"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_01a03ec0-f914-7999-a881-bdf2ad32e990" xlink:to="loc_us-gaap_ShortTermDebtTerms_01a03ec0-f914-7b45-a2b3-f9b1ce65194a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_01a03ec0-f914-7015-9bca-b0a3b5aaf409" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_01a03ec0-f914-7999-a881-bdf2ad32e990" xlink:to="loc_us-gaap_ShortTermBorrowings_01a03ec0-f914-7015-9bca-b0a3b5aaf409" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPaid_01a03ec0-f914-7f00-8d5a-c40f779be0d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_01a03ec0-f914-7999-a881-bdf2ad32e990" xlink:to="loc_us-gaap_InterestPaid_01a03ec0-f914-7f00-8d5a-c40f779be0d3" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/DebtScheduleofDeferredFinancingCostsDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#DebtScheduleofDeferredFinancingCostsDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/DebtScheduleofDeferredFinancingCostsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_01a03ec0-f914-7a94-8cba-336968aa3444" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_01a03ec0-f914-7d7c-ac5e-cbbee221e9f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a03ec0-f914-7a94-8cba-336968aa3444" xlink:to="loc_us-gaap_DebtInstrumentTable_01a03ec0-f914-7d7c-ac5e-cbbee221e9f2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_01a03ec0-f914-7fc3-bd8d-d2e08c6493c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_01a03ec0-f914-7d7c-ac5e-cbbee221e9f2" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_01a03ec0-f914-7fc3-bd8d-d2e08c6493c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_01a03ec0-f914-7390-b301-0d68ca81e4c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a03ec0-f914-7a94-8cba-336968aa3444" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_01a03ec0-f914-7390-b301-0d68ca81e4c1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/DebtScheduleofDeferredFinancingCostsDetails_1" xlink:type="simple" xlink:href="msgk-20260930.xsd#DebtScheduleofDeferredFinancingCostsDetails_1"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/DebtScheduleofDeferredFinancingCostsDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_01a03ec0-f914-7a94-8cba-336968aa3444" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_01a03ec0-f914-7d7c-ac5e-cbbee221e9f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a03ec0-f914-7a94-8cba-336968aa3444" xlink:to="loc_us-gaap_DebtInstrumentTable_01a03ec0-f914-7d7c-ac5e-cbbee221e9f2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_01a03ec0-f914-7390-b301-0d68ca81e4c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a03ec0-f914-7a94-8cba-336968aa3444" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_01a03ec0-f914-7390-b301-0d68ca81e4c1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/SharebasedCompensationNarrativeDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#SharebasedCompensationNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/SharebasedCompensationNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a1ad7c-1706-70d5-8fa6-308f628afbe2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01a1ad7c-1706-75ca-9b63-647d8763433d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a1ad7c-1706-70d5-8fa6-308f628afbe2" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01a1ad7c-1706-75ca-9b63-647d8763433d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_01a1ad7c-1706-75d0-8ced-5dafe51df8de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01a1ad7c-1706-75ca-9b63-647d8763433d" xlink:to="loc_us-gaap_PlanNameAxis_01a1ad7c-1706-75d0-8ced-5dafe51df8de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_01a1ad7c-1706-75d0-8ced-5dafe51df8de_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_01a1ad7c-1706-75d0-8ced-5dafe51df8de" xlink:to="loc_us-gaap_PlanNameDomain_01a1ad7c-1706-75d0-8ced-5dafe51df8de_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_01a1ad7c-1706-7799-9a66-1114ece6a22f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_01a1ad7c-1706-75d0-8ced-5dafe51df8de" xlink:to="loc_us-gaap_PlanNameDomain_01a1ad7c-1706-7799-9a66-1114ece6a22f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_NonEmployeeDirectorPlanMember_01a1ad7c-1706-76ac-bdff-633ab25bda8c" xlink:href="msgk-20260930.xsd#msgk_NonEmployeeDirectorPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_01a1ad7c-1706-7799-9a66-1114ece6a22f" xlink:to="loc_msgk_NonEmployeeDirectorPlanMember_01a1ad7c-1706-76ac-bdff-633ab25bda8c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_EmployeeStockPlanMember_01a1ad7c-1706-7e16-a87b-1589a4c04963" xlink:href="msgk-20260930.xsd#msgk_EmployeeStockPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_01a1ad7c-1706-7799-9a66-1114ece6a22f" xlink:to="loc_msgk_EmployeeStockPlanMember_01a1ad7c-1706-7e16-a87b-1589a4c04963" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_01a1ad7c-1706-7086-86ce-efa439baca6e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01a1ad7c-1706-75ca-9b63-647d8763433d" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_01a1ad7c-1706-7086-86ce-efa439baca6e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_01a1ad7c-1706-7086-86ce-efa439baca6e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_01a1ad7c-1706-7086-86ce-efa439baca6e" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_01a1ad7c-1706-7086-86ce-efa439baca6e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_01a1ad7c-1706-747c-91ee-778846997bf5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_01a1ad7c-1706-7086-86ce-efa439baca6e" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_01a1ad7c-1706-747c-91ee-778846997bf5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SpinoffMember_01a1ad7c-1706-7991-9e70-af62040e5e27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SpinoffMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_01a1ad7c-1706-747c-91ee-778846997bf5" xlink:to="loc_us-gaap_SpinoffMember_01a1ad7c-1706-7991-9e70-af62040e5e27" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_01a1ad7c-1706-71d3-870e-a991e7f457f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01a1ad7c-1706-75ca-9b63-647d8763433d" xlink:to="loc_us-gaap_StatementClassOfStockAxis_01a1ad7c-1706-71d3-870e-a991e7f457f7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a1ad7c-1706-71d3-870e-a991e7f457f7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a1ad7c-1706-71d3-870e-a991e7f457f7" xlink:to="loc_us-gaap_ClassOfStockDomain_01a1ad7c-1706-71d3-870e-a991e7f457f7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a1ad7c-1706-7f16-ac53-5d7f13f8e9c0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a1ad7c-1706-71d3-870e-a991e7f457f7" xlink:to="loc_us-gaap_ClassOfStockDomain_01a1ad7c-1706-7f16-ac53-5d7f13f8e9c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_01a1ad7c-1706-7861-9d28-eca90d51d80b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a1ad7c-1706-7f16-ac53-5d7f13f8e9c0" xlink:to="loc_us-gaap_CommonClassAMember_01a1ad7c-1706-7861-9d28-eca90d51d80b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_01a1ad7c-1706-7d0c-b7ea-136996395376" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01a1ad7c-1706-75ca-9b63-647d8763433d" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_01a1ad7c-1706-7d0c-b7ea-136996395376" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_01a1ad7c-1706-7d0c-b7ea-136996395376_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_01a1ad7c-1706-7d0c-b7ea-136996395376" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_01a1ad7c-1706-7d0c-b7ea-136996395376_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_01a1ad7c-1706-7154-8ac5-d842b3bcfa17" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_01a1ad7c-1706-7d0c-b7ea-136996395376" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_01a1ad7c-1706-7154-8ac5-d842b3bcfa17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_01a1ad7c-1706-749b-ab6e-cc1ecded025f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_01a1ad7c-1706-7154-8ac5-d842b3bcfa17" xlink:to="loc_us-gaap_SubsequentEventMember_01a1ad7c-1706-749b-ab6e-cc1ecded025f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_01a03ec0-f914-71a6-89e8-f2cfe1862812" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a1ad7c-1706-70d5-8fa6-308f628afbe2" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_01a03ec0-f914-71a6-89e8-f2cfe1862812" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_01a03ec0-f914-7605-bc90-69fb8e88debb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a1ad7c-1706-70d5-8fa6-308f628afbe2" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_01a03ec0-f914-7605-bc90-69fb8e88debb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesReceivedForEveryRestrictedStockUnitOwnedOnRecordDate_01a1ad78-05a0-7850-bc89-c2124eb88c65" xlink:href="msgk-20260930.xsd#msgk_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesReceivedForEveryRestrictedStockUnitOwnedOnRecordDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a1ad7c-1706-70d5-8fa6-308f628afbe2" xlink:to="loc_msgk_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesReceivedForEveryRestrictedStockUnitOwnedOnRecordDate_01a1ad78-05a0-7850-bc89-c2124eb88c65" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedPerHolderOnRecordDate_01a1ad76-c793-78b6-8bd4-1bc9f23091bc" xlink:href="msgk-20260930.xsd#msgk_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedPerHolderOnRecordDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a1ad7c-1706-70d5-8fa6-308f628afbe2" xlink:to="loc_msgk_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedPerHolderOnRecordDate_01a1ad76-c793-78b6-8bd4-1bc9f23091bc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfOptionsToPurchasePerHolderOnRecordDate_01a1ad77-a87e-7374-beab-488a8b7f1d3f" xlink:href="msgk-20260930.xsd#msgk_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfOptionsToPurchasePerHolderOnRecordDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a1ad7c-1706-70d5-8fa6-308f628afbe2" xlink:to="loc_msgk_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfOptionsToPurchasePerHolderOnRecordDate_01a1ad77-a87e-7374-beab-488a8b7f1d3f" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/SharebasedCompensationScheduleofRSUandPSUActivityDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#SharebasedCompensationScheduleofRSUandPSUActivityDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/SharebasedCompensationScheduleofRSUandPSUActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a03ec0-f914-763b-a1c6-75f8f4f03301" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01a03ec0-f914-7d25-bd35-69bb647d9b4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a03ec0-f914-763b-a1c6-75f8f4f03301" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01a03ec0-f914-7d25-bd35-69bb647d9b4e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_01a03ec0-f914-7e06-bed2-b3a1cdf8175c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01a03ec0-f914-7d25-bd35-69bb647d9b4e" xlink:to="loc_us-gaap_AwardTypeAxis_01a03ec0-f914-7e06-bed2-b3a1cdf8175c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a03ec0-f914-7e06-bed2-b3a1cdf8175c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_01a03ec0-f914-7e06-bed2-b3a1cdf8175c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a03ec0-f914-7e06-bed2-b3a1cdf8175c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a03ec0-f914-7b8d-aaf3-df6c91f82eba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_01a03ec0-f914-7e06-bed2-b3a1cdf8175c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a03ec0-f914-7b8d-aaf3-df6c91f82eba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_01a03ec0-f914-7f26-8775-d4282a47b188" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a03ec0-f914-7b8d-aaf3-df6c91f82eba" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_01a03ec0-f914-7f26-8775-d4282a47b188" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_PerformanceStockUnitsPSUsMember_01a09db5-20f7-7f42-a1c5-b143727add89" xlink:href="msgk-20260930.xsd#msgk_PerformanceStockUnitsPSUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a03ec0-f914-7b8d-aaf3-df6c91f82eba" xlink:to="loc_msgk_PerformanceStockUnitsPSUsMember_01a09db5-20f7-7f42-a1c5-b143727add89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_01a03ec0-f914-711a-a656-08e6084f27c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a03ec0-f914-763b-a1c6-75f8f4f03301" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_01a03ec0-f914-711a-a656-08e6084f27c6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_01a03ec0-f914-7f6e-8336-283a2f85fb92" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_01a03ec0-f914-711a-a656-08e6084f27c6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_01a03ec0-f914-7f6e-8336-283a2f85fb92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_01a03ec0-f914-7133-b3a1-1d127851fdfe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_01a03ec0-f914-711a-a656-08e6084f27c6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_01a03ec0-f914-7133-b3a1-1d127851fdfe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_01a03ec0-f914-74c3-9832-d6abcf57a061" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_01a03ec0-f914-711a-a656-08e6084f27c6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_01a03ec0-f914-74c3-9832-d6abcf57a061" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_01a03ec0-f914-7299-b0c7-1deb83d8a0eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_01a03ec0-f914-711a-a656-08e6084f27c6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_01a03ec0-f914-7299-b0c7-1deb83d8a0eb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_01a03ec0-f914-77fa-aae0-13dbd2a34a4b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_01a03ec0-f914-7122-b527-f38da6fa3452" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a03ec0-f914-763b-a1c6-75f8f4f03301" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_01a03ec0-f914-7122-b527-f38da6fa3452" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_01a03ec0-f914-7b7f-9672-08e967f07fb2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_01a03ec0-f914-7122-b527-f38da6fa3452" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_01a03ec0-f914-7b7f-9672-08e967f07fb2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_01a03ec0-f914-792c-ab61-b31daad09a3a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_01a03ec0-f914-7122-b527-f38da6fa3452" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_01a03ec0-f914-792c-ab61-b31daad09a3a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_01a03ec0-f914-7eb3-b7ce-37115358f6cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_01a03ec0-f914-7122-b527-f38da6fa3452" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_01a03ec0-f914-7eb3-b7ce-37115358f6cb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_01a03ec0-f914-7639-9dd2-cd0372752e62" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_01a03ec0-f914-7122-b527-f38da6fa3452" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_01a03ec0-f914-7639-9dd2-cd0372752e62" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_01a03ec0-f914-716f-95bf-74a3b151788b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/SharebasedCompensationRestrictedStockUnitsAwardActivityNarrativeDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#SharebasedCompensationRestrictedStockUnitsAwardActivityNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/SharebasedCompensationRestrictedStockUnitsAwardActivityNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a03ec0-f914-76b2-a8df-7ff9493645ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01a03ec0-f914-73e9-8dcb-4e15c415a095" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a03ec0-f914-76b2-a8df-7ff9493645ae" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01a03ec0-f914-73e9-8dcb-4e15c415a095" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_01a03ec0-f914-734c-b1be-ac3dbe72b4c7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01a03ec0-f914-73e9-8dcb-4e15c415a095" xlink:to="loc_us-gaap_AwardTypeAxis_01a03ec0-f914-734c-b1be-ac3dbe72b4c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a03ec0-f914-734c-b1be-ac3dbe72b4c7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_01a03ec0-f914-734c-b1be-ac3dbe72b4c7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a03ec0-f914-734c-b1be-ac3dbe72b4c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a03ec0-f914-71cc-9f2d-4b5e8185402c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_01a03ec0-f914-734c-b1be-ac3dbe72b4c7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a03ec0-f914-71cc-9f2d-4b5e8185402c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_RestrictedStockUnitsRSUsAndPerformanceStockUnitsPSUsMember_01a09dbb-0d03-7526-94ea-45fda2bde61a" xlink:href="msgk-20260930.xsd#msgk_RestrictedStockUnitsRSUsAndPerformanceStockUnitsPSUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_01a03ec0-f914-71cc-9f2d-4b5e8185402c" xlink:to="loc_msgk_RestrictedStockUnitsRSUsAndPerformanceStockUnitsPSUsMember_01a09dbb-0d03-7526-94ea-45fda2bde61a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f914-749c-b06b-1b62dee4b406" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_01a03ec0-f914-73e9-8dcb-4e15c415a095" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f914-749c-b06b-1b62dee4b406" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_01a03ec0-f914-749c-b06b-1b62dee4b406_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f914-749c-b06b-1b62dee4b406" xlink:to="loc_us-gaap_RelatedPartyDomain_01a03ec0-f914-749c-b06b-1b62dee4b406_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_01a03ec0-f914-7d4e-a17e-2c0cefc0bd0e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f914-749c-b06b-1b62dee4b406" xlink:to="loc_us-gaap_RelatedPartyDomain_01a03ec0-f914-7d4e-a17e-2c0cefc0bd0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_01a03ec0-f914-75a1-a5e9-6a0bb0478c48" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_01a03ec0-f914-7d4e-a17e-2c0cefc0bd0e" xlink:to="loc_us-gaap_RelatedPartyMember_01a03ec0-f914-75a1-a5e9-6a0bb0478c48" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_01a03ec0-f914-71d2-a61a-78bea356641f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a03ec0-f914-76b2-a8df-7ff9493645ae" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_01a03ec0-f914-71d2-a61a-78bea356641f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_01a03ec0-f914-70e2-935d-3b7f52124a75" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a03ec0-f914-76b2-a8df-7ff9493645ae" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_01a03ec0-f914-70e2-935d-3b7f52124a75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_01a03ec0-f914-7f52-a856-1378f1a18fb0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a03ec0-f914-76b2-a8df-7ff9493645ae" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_01a03ec0-f914-7f52-a856-1378f1a18fb0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_01a03ec0-f914-7628-96dc-4fa2d0cdfeb1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_01a03ec0-f914-76b2-a8df-7ff9493645ae" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_01a03ec0-f914-7628-96dc-4fa2d0cdfeb1" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/RelatedPartyTransactionsNarrativeDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#RelatedPartyTransactionsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/RelatedPartyTransactionsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7b2f-bf72-b04fdc920874" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01a03ec0-f9bf-7aa4-900c-dab76a4131b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7b2f-bf72-b04fdc920874" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01a03ec0-f9bf-7aa4-900c-dab76a4131b8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f9bf-7716-a0f3-9a14acb702e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01a03ec0-f9bf-7aa4-900c-dab76a4131b8" xlink:to="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f9bf-7716-a0f3-9a14acb702e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a03ec0-f9bf-7716-a0f3-9a14acb702e0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f9bf-7716-a0f3-9a14acb702e0" xlink:to="loc_us-gaap_ClassOfStockDomain_01a03ec0-f9bf-7716-a0f3-9a14acb702e0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a03ec0-f9bf-71e4-918e-a98407433fea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a03ec0-f9bf-7716-a0f3-9a14acb702e0" xlink:to="loc_us-gaap_ClassOfStockDomain_01a03ec0-f9bf-71e4-918e-a98407433fea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_01a03ec0-f9bf-7c97-aba5-3f6a0a340d5b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a03ec0-f9bf-71e4-918e-a98407433fea" xlink:to="loc_us-gaap_CommonClassBMember_01a03ec0-f9bf-7c97-aba5-3f6a0a340d5b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_01a03ec0-f9bf-7dc4-a1e3-b67e251dd847" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a03ec0-f9bf-71e4-918e-a98407433fea" xlink:to="loc_us-gaap_CommonClassAMember_01a03ec0-f9bf-7dc4-a1e3-b67e251dd847" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_01a03ec0-f9bf-7ee9-96bd-ddb334cb1987" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01a03ec0-f9bf-7aa4-900c-dab76a4131b8" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_01a03ec0-f9bf-7ee9-96bd-ddb334cb1987" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_01a03ec0-f9bf-7ee9-96bd-ddb334cb1987_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_01a03ec0-f9bf-7ee9-96bd-ddb334cb1987" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_01a03ec0-f9bf-7ee9-96bd-ddb334cb1987_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_01a03ec0-f9bf-7c60-a999-4e13a77489ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_01a03ec0-f9bf-7ee9-96bd-ddb334cb1987" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_01a03ec0-f9bf-7c60-a999-4e13a77489ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_ArenaLicenseAgreementsMember_01a03ec0-f9bf-7188-b813-2b821967a223" xlink:href="msgk-20260930.xsd#msgk_ArenaLicenseAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_01a03ec0-f9bf-7c60-a999-4e13a77489ff" xlink:to="loc_msgk_ArenaLicenseAgreementsMember_01a03ec0-f9bf-7188-b813-2b821967a223" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_SponsorshipSalesAndServiceRepresentationAgreementsMember_01a03ec0-f9bf-7f9c-bd62-fa2a1060732f" xlink:href="msgk-20260930.xsd#msgk_SponsorshipSalesAndServiceRepresentationAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_01a03ec0-f9bf-7c60-a999-4e13a77489ff" xlink:to="loc_msgk_SponsorshipSalesAndServiceRepresentationAgreementsMember_01a03ec0-f9bf-7f9c-bd62-fa2a1060732f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_MSGRangersLeaseAgreementMember_01a1a70c-8f1b-705e-993f-dc239df68c97" xlink:href="msgk-20260930.xsd#msgk_MSGRangersLeaseAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_01a03ec0-f9bf-7c60-a999-4e13a77489ff" xlink:to="loc_msgk_MSGRangersLeaseAgreementMember_01a1a70c-8f1b-705e-993f-dc239df68c97" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f9bf-72f4-b07f-670b5a7a3471" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01a03ec0-f9bf-7aa4-900c-dab76a4131b8" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f9bf-72f4-b07f-670b5a7a3471" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_01a03ec0-f9bf-72f4-b07f-670b5a7a3471_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f9bf-72f4-b07f-670b5a7a3471" xlink:to="loc_us-gaap_RelatedPartyDomain_01a03ec0-f9bf-72f4-b07f-670b5a7a3471_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_01a03ec0-f9bf-7203-8e5a-910a55e83182" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f9bf-72f4-b07f-670b5a7a3471" xlink:to="loc_us-gaap_RelatedPartyDomain_01a03ec0-f9bf-7203-8e5a-910a55e83182" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_MSGEntertainmentMember_01a03ec0-f9bf-7de2-8a81-5b413f307b60" xlink:href="msgk-20260930.xsd#msgk_MSGEntertainmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_01a03ec0-f9bf-7203-8e5a-910a55e83182" xlink:to="loc_msgk_MSGEntertainmentMember_01a03ec0-f9bf-7de2-8a81-5b413f307b60" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_MSGRangersMember_01a1a605-f812-7426-a768-676a5e0436fb" xlink:href="msgk-20260930.xsd#msgk_MSGRangersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_01a03ec0-f9bf-7203-8e5a-910a55e83182" xlink:to="loc_msgk_MSGRangersMember_01a1a605-f812-7426-a768-676a5e0436fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f9bf-7f83-acb2-fa81bf6682ed" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01a03ec0-f9bf-7aa4-900c-dab76a4131b8" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f9bf-7f83-acb2-fa81bf6682ed" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f9bf-7f83-acb2-fa81bf6682ed_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f9bf-7f83-acb2-fa81bf6682ed" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f9bf-7f83-acb2-fa81bf6682ed_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f9bf-78e4-8d65-bb9c00ee8723" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01a03ec0-f9bf-7f83-acb2-fa81bf6682ed" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f9bf-78e4-8d65-bb9c00ee8723" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_MSGNetworksMember_01a03ec0-f9bf-70d7-931f-a0193b7a4e8c" xlink:href="msgk-20260930.xsd#msgk_MSGNetworksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_01a03ec0-f9bf-78e4-8d65-bb9c00ee8723" xlink:to="loc_msgk_MSGNetworksMember_01a03ec0-f9bf-70d7-931f-a0193b7a4e8c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_LeasePeriodAxis_01a1a711-0bd4-7e85-87cf-e0318ec1d3c9" xlink:href="msgk-20260930.xsd#msgk_LeasePeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01a03ec0-f9bf-7aa4-900c-dab76a4131b8" xlink:to="loc_msgk_LeasePeriodAxis_01a1a711-0bd4-7e85-87cf-e0318ec1d3c9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_LeasePeriodDomain_01a1a711-0bd4-7e85-87cf-e0318ec1d3c9_default" xlink:href="msgk-20260930.xsd#msgk_LeasePeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_msgk_LeasePeriodAxis_01a1a711-0bd4-7e85-87cf-e0318ec1d3c9" xlink:to="loc_msgk_LeasePeriodDomain_01a1a711-0bd4-7e85-87cf-e0318ec1d3c9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_LeasePeriodDomain_01a1a711-0bd4-7b68-8e3c-d5195e76977f" xlink:href="msgk-20260930.xsd#msgk_LeasePeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_msgk_LeasePeriodAxis_01a1a711-0bd4-7e85-87cf-e0318ec1d3c9" xlink:to="loc_msgk_LeasePeriodDomain_01a1a711-0bd4-7b68-8e3c-d5195e76977f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_FirstContractYearMember_01a1a711-44fe-7c2d-9316-94c2cba51965" xlink:href="msgk-20260930.xsd#msgk_FirstContractYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_msgk_LeasePeriodDomain_01a1a711-0bd4-7b68-8e3c-d5195e76977f" xlink:to="loc_msgk_FirstContractYearMember_01a1a711-44fe-7c2d-9316-94c2cba51965" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_PercentageOfCommonStockOwnedByRelatedParty_01a03ec0-f9bf-7934-adc0-1e9137db3335" xlink:href="msgk-20260930.xsd#msgk_PercentageOfCommonStockOwnedByRelatedParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7b2f-bf72-b04fdc920874" xlink:to="loc_msgk_PercentageOfCommonStockOwnedByRelatedParty_01a03ec0-f9bf-7934-adc0-1e9137db3335" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_01a03ec0-f9bf-72a1-824b-041c1d3d26f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7b2f-bf72-b04fdc920874" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_01a03ec0-f9bf-72a1-824b-041c1d3d26f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_AggregateVotingPowerHeldByRelatedParty_01a03ec0-f9bf-7834-8d5c-6585a8ee9c2a" xlink:href="msgk-20260930.xsd#msgk_AggregateVotingPowerHeldByRelatedParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7b2f-bf72-b04fdc920874" xlink:to="loc_msgk_AggregateVotingPowerHeldByRelatedParty_01a03ec0-f9bf-7834-8d5c-6585a8ee9c2a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_LicenseAgreementsTerm_01a03ec0-f9bf-7692-9260-29711b89285d" xlink:href="msgk-20260930.xsd#msgk_LicenseAgreementsTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7b2f-bf72-b04fdc920874" xlink:to="loc_msgk_LicenseAgreementsTerm_01a03ec0-f9bf-7692-9260-29711b89285d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_RelatedPartyTransactionPercentageOfNetProfitsFromSalesAndCateringServices_01a03ec0-f9bf-70ae-87c0-485ef3b57664" xlink:href="msgk-20260930.xsd#msgk_RelatedPartyTransactionPercentageOfNetProfitsFromSalesAndCateringServices"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7b2f-bf72-b04fdc920874" xlink:to="loc_msgk_RelatedPartyTransactionPercentageOfNetProfitsFromSalesAndCateringServices_01a03ec0-f9bf-70ae-87c0-485ef3b57664" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_PennyWarrantsIssuedExercisablePercentageOfEquityInterests_01a03ec0-f9bf-7680-80bd-ee186d39e13b" xlink:href="msgk-20260930.xsd#msgk_PennyWarrantsIssuedExercisablePercentageOfEquityInterests"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7b2f-bf72-b04fdc920874" xlink:to="loc_msgk_PennyWarrantsIssuedExercisablePercentageOfEquityInterests_01a03ec0-f9bf-7680-80bd-ee186d39e13b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_PercentageOfEquityInterestsReceivedInExchangeForWarrantsExercisable_01a1a46a-1042-7827-b159-88e5b6fb6fe3" xlink:href="msgk-20260930.xsd#msgk_PercentageOfEquityInterestsReceivedInExchangeForWarrantsExercisable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7b2f-bf72-b04fdc920874" xlink:to="loc_msgk_PercentageOfEquityInterestsReceivedInExchangeForWarrantsExercisable_01a1a46a-1042-7827-b159-88e5b6fb6fe3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeaseTermOfContract_01a1a714-4943-7b44-93de-7ea18ce9573f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LessorOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7b2f-bf72-b04fdc920874" xlink:to="loc_us-gaap_LessorOperatingLeaseTermOfContract_01a1a714-4943-7b44-93de-7ea18ce9573f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRent_01a1a70b-e714-7851-807d-bda3071703bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForRent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7b2f-bf72-b04fdc920874" xlink:to="loc_us-gaap_PaymentsForRent_01a1a70b-e714-7851-807d-bda3071703bb" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_RelatedPartyTransactionLeaseAnnualFixedRentAsAPercentageOfPrecedingContractYear_01a1a46a-1042-77de-9c24-eaa21e9a946f" xlink:href="msgk-20260930.xsd#msgk_RelatedPartyTransactionLeaseAnnualFixedRentAsAPercentageOfPrecedingContractYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7b2f-bf72-b04fdc920874" xlink:to="loc_msgk_RelatedPartyTransactionLeaseAnnualFixedRentAsAPercentageOfPrecedingContractYear_01a1a46a-1042-77de-9c24-eaa21e9a946f" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/RelatedPartyTransactionsScheduleofRelatedPartyTransactionsDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#RelatedPartyTransactionsScheduleofRelatedPartyTransactionsDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/RelatedPartyTransactionsScheduleofRelatedPartyTransactionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7197-b328-ea437b232a5d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01a03ec0-f9bf-73f1-ae9c-74fe31679a68" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7197-b328-ea437b232a5d" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01a03ec0-f9bf-73f1-ae9c-74fe31679a68" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f9bf-7c20-b9e1-84365c9c9cf8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01a03ec0-f9bf-73f1-ae9c-74fe31679a68" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f9bf-7c20-b9e1-84365c9c9cf8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_01a03ec0-f9bf-7c20-b9e1-84365c9c9cf8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f9bf-7c20-b9e1-84365c9c9cf8" xlink:to="loc_us-gaap_RelatedPartyDomain_01a03ec0-f9bf-7c20-b9e1-84365c9c9cf8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_01a03ec0-f9bf-75ac-8c3b-76c9ff70a495" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_01a03ec0-f9bf-7c20-b9e1-84365c9c9cf8" xlink:to="loc_us-gaap_RelatedPartyDomain_01a03ec0-f9bf-75ac-8c3b-76c9ff70a495" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_01a03ec0-f9bf-7e6f-b2d1-fb49952eb8f0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_01a03ec0-f9bf-75ac-8c3b-76c9ff70a495" xlink:to="loc_us-gaap_RelatedPartyMember_01a03ec0-f9bf-7e6f-b2d1-fb49952eb8f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_01a03ec0-f9bf-73c0-af80-a1d9184df4af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7197-b328-ea437b232a5d" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_01a03ec0-f9bf-73c0-af80-a1d9184df4af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract_01a03ec0-f9bf-7445-ae65-fef2a8c158e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_01a03ec0-f9bf-7197-b328-ea437b232a5d" xlink:to="loc_us-gaap_OperatingExpensesAbstract_01a03ec0-f9bf-7445-ae65-fef2a8c158e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_RelatedPartyTransactionCorporateGeneralAndAdministrativeExpenseCredit_01a03ec0-f9bf-793a-acc0-3e3e65a38e64" xlink:href="msgk-20260930.xsd#msgk_RelatedPartyTransactionCorporateGeneralAndAdministrativeExpenseCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_01a03ec0-f9bf-7445-ae65-fef2a8c158e8" xlink:to="loc_msgk_RelatedPartyTransactionCorporateGeneralAndAdministrativeExpenseCredit_01a03ec0-f9bf-793a-acc0-3e3e65a38e64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_RelatedPartyTransactionRentExpense_01a03ec0-f9bf-7c2b-9b04-128657c81733" xlink:href="msgk-20260930.xsd#msgk_RelatedPartyTransactionRentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_01a03ec0-f9bf-7445-ae65-fef2a8c158e8" xlink:to="loc_msgk_RelatedPartyTransactionRentExpense_01a03ec0-f9bf-7c2b-9b04-128657c81733" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_RelatedPartyTransactionSponsorshipSalesAndServiceRepresentationAgreementCosts_01a03ec0-f9bf-7ce5-bed2-ab6cbdf01b18" xlink:href="msgk-20260930.xsd#msgk_RelatedPartyTransactionSponsorshipSalesAndServiceRepresentationAgreementCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_01a03ec0-f9bf-7445-ae65-fef2a8c158e8" xlink:to="loc_msgk_RelatedPartyTransactionSponsorshipSalesAndServiceRepresentationAgreementCosts_01a03ec0-f9bf-7ce5-bed2-ab6cbdf01b18" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_RelatedPartyTransactionOperatingLeaseExpenseAssociatedWithArenaLicenseAgreements_01a03ec0-f9bf-78be-ae23-96747851cdc7" xlink:href="msgk-20260930.xsd#msgk_RelatedPartyTransactionOperatingLeaseExpenseAssociatedWithArenaLicenseAgreements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_01a03ec0-f9bf-7445-ae65-fef2a8c158e8" xlink:to="loc_msgk_RelatedPartyTransactionOperatingLeaseExpenseAssociatedWithArenaLicenseAgreements_01a03ec0-f9bf-78be-ae23-96747851cdc7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_RelatedPartyTransactionsArenaLicenseAgreements_01a03ec0-f9bf-70cb-b473-ae84910a04b7" xlink:href="msgk-20260930.xsd#msgk_RelatedPartyTransactionsArenaLicenseAgreements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_01a03ec0-f9bf-7445-ae65-fef2a8c158e8" xlink:to="loc_msgk_RelatedPartyTransactionsArenaLicenseAgreements_01a03ec0-f9bf-70cb-b473-ae84910a04b7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_RelatedPartyTransactionOtherExpensesCreditsFromTransactionsWithRelatedParty_01a03ec0-f9bf-7127-b685-d2578a58f0c1" xlink:href="msgk-20260930.xsd#msgk_RelatedPartyTransactionOtherExpensesCreditsFromTransactionsWithRelatedParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_01a03ec0-f9bf-7445-ae65-fef2a8c158e8" xlink:to="loc_msgk_RelatedPartyTransactionOtherExpensesCreditsFromTransactionsWithRelatedParty_01a03ec0-f9bf-7127-b685-d2578a58f0c1" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.msgsports.com/role/SegmentInformationScheduleOfSegmentInformationDetails" xlink:type="simple" xlink:href="msgk-20260930.xsd#SegmentInformationScheduleOfSegmentInformationDetails"/>
  <link:definitionLink xlink:role="http://www.msgsports.com/role/SegmentInformationScheduleOfSegmentInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_01a03ec0-f9bf-7986-a5bb-01135672944c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_01a03ec0-f9bf-7e59-82e2-f5fc836f2c86" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a03ec0-f9bf-7986-a5bb-01135672944c" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_01a03ec0-f9bf-7e59-82e2-f5fc836f2c86" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_01a03ec0-f9bf-7c6a-8735-34b7a74026b3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_01a03ec0-f9bf-7e59-82e2-f5fc836f2c86" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_01a03ec0-f9bf-7c6a-8735-34b7a74026b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a03ec0-f9bf-7c6a-8735-34b7a74026b3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a03ec0-f9bf-7c6a-8735-34b7a74026b3" xlink:to="loc_us-gaap_SegmentDomain_01a03ec0-f9bf-7c6a-8735-34b7a74026b3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a03ec0-f9bf-7fe0-90f0-c9b002cb194a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a03ec0-f9bf-7c6a-8735-34b7a74026b3" xlink:to="loc_us-gaap_SegmentDomain_01a03ec0-f9bf-7fe0-90f0-c9b002cb194a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_SingleOperatingSegmentMember_01a03ec0-f9bf-75cc-9bd7-1d825f26cc34" xlink:href="msgk-20260930.xsd#msgk_SingleOperatingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_01a03ec0-f9bf-7fe0-90f0-c9b002cb194a" xlink:to="loc_msgk_SingleOperatingSegmentMember_01a03ec0-f9bf-75cc-9bd7-1d825f26cc34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_01a03ec0-f9bf-7d24-9062-34785d95ad88" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_01a03ec0-f9bf-7e59-82e2-f5fc836f2c86" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_01a03ec0-f9bf-7d24-9062-34785d95ad88" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_01a03ec0-f9bf-7d24-9062-34785d95ad88_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_01a03ec0-f9bf-7d24-9062-34785d95ad88" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_01a03ec0-f9bf-7d24-9062-34785d95ad88_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_01a03ec0-f9bf-709b-9a28-d41300db2df4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_01a03ec0-f9bf-7d24-9062-34785d95ad88" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_01a03ec0-f9bf-709b-9a28-d41300db2df4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_ArenaLicenseAgreementsMember_01a03ec0-f9bf-7c9d-b8d2-9a0d639c89b6" xlink:href="msgk-20260930.xsd#msgk_ArenaLicenseAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_01a03ec0-f9bf-709b-9a28-d41300db2df4" xlink:to="loc_msgk_ArenaLicenseAgreementsMember_01a03ec0-f9bf-7c9d-b8d2-9a0d639c89b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_01a03ec0-f9bf-7d7c-bd50-453dd171009e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a03ec0-f9bf-7986-a5bb-01135672944c" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_01a03ec0-f9bf-7d7c-bd50-453dd171009e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_01a03ec0-f9bf-7b26-b82e-24e486f730f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a03ec0-f9bf-7986-a5bb-01135672944c" xlink:to="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_01a03ec0-f9bf-7b26-b82e-24e486f730f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_TicketingAndSponsorshipSalesRelatedExpenses_01a03ec0-f9bf-771a-b24c-653baddce437" xlink:href="msgk-20260930.xsd#msgk_TicketingAndSponsorshipSalesRelatedExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_01a03ec0-f9bf-7b26-b82e-24e486f730f8" xlink:to="loc_msgk_TicketingAndSponsorshipSalesRelatedExpenses_01a03ec0-f9bf-771a-b24c-653baddce437" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_MarketingAndEventRelatedExpenses_01a03ec0-f9bf-7a2f-bcf4-52b69e6c5d85" xlink:href="msgk-20260930.xsd#msgk_MarketingAndEventRelatedExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_01a03ec0-f9bf-7b26-b82e-24e486f730f8" xlink:to="loc_msgk_MarketingAndEventRelatedExpenses_01a03ec0-f9bf-7a2f-bcf4-52b69e6c5d85" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_CorporateAndAdministrativeExpense_01a03ec0-f9bf-73ac-8b11-e77ccaa32fcc" xlink:href="msgk-20260930.xsd#msgk_CorporateAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_01a03ec0-f9bf-7b26-b82e-24e486f730f8" xlink:to="loc_msgk_CorporateAndAdministrativeExpense_01a03ec0-f9bf-73ac-8b11-e77ccaa32fcc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseExpense_01a03ec0-f9bf-74a8-b2f7-21a0c139b500" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_01a03ec0-f9bf-7b26-b82e-24e486f730f8" xlink:to="loc_us-gaap_OperatingLeaseExpense_01a03ec0-f9bf-74a8-b2f7-21a0c139b500" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_msgk_TeamOperatingExpenses_01a03ec0-f9bf-7ea8-a8a9-65b3827c3dc3" xlink:href="msgk-20260930.xsd#msgk_TeamOperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_01a03ec0-f9bf-7b26-b82e-24e486f730f8" xlink:to="loc_msgk_TeamOperatingExpenses_01a03ec0-f9bf-7ea8-a8a9-65b3827c3dc3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_01a03ec0-f9bf-772b-8f50-7b9f42900fee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a03ec0-f9bf-7986-a5bb-01135672944c" xlink:to="loc_us-gaap_DepreciationAndAmortization_01a03ec0-f9bf-772b-8f50-7b9f42900fee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_01a03ec0-f9bf-78d3-aa66-ad77d31673bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a03ec0-f9bf-7986-a5bb-01135672944c" xlink:to="loc_us-gaap_RestructuringCharges_01a03ec0-f9bf-78d3-aa66-ad77d31673bb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_01a03ec0-f9bf-7962-8338-c48feefbcd2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a03ec0-f9bf-7986-a5bb-01135672944c" xlink:to="loc_us-gaap_InvestmentIncomeInterest_01a03ec0-f9bf-7962-8338-c48feefbcd2a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_01a03ec0-f9bf-79c2-872b-402318b991da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a03ec0-f9bf-7986-a5bb-01135672944c" xlink:to="loc_us-gaap_InterestExpenseNonoperating_01a03ec0-f9bf-79c2-872b-402318b991da" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_01a03ec0-f9bf-7005-a539-0326045a8ff2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a03ec0-f9bf-7986-a5bb-01135672944c" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_01a03ec0-f9bf-7005-a539-0326045a8ff2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_01a03ec0-f9bf-7817-accf-8c638841a3b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a03ec0-f9bf-7986-a5bb-01135672944c" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_01a03ec0-f9bf-7817-accf-8c638841a3b7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_01a03ec0-f9bf-78d7-9afb-ddf1b19026cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a03ec0-f9bf-7986-a5bb-01135672944c" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_01a03ec0-f9bf-78d7-9afb-ddf1b19026cc" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_01a03ec0-f9bf-7699-a837-fe3cf3aeb7b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a03ec0-f9bf-7986-a5bb-01135672944c" xlink:to="loc_us-gaap_ProfitLoss_01a03ec0-f9bf-7699-a837-fe3cf3aeb7b7" xlink:type="arc" order="9"/>
  </link:definitionLink>
</link:linkbase>
