<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<!--Created by Genesis Filings LLC, Powered by IRIS Carbon, Unique Code 6a0380c800370328fc22b511, Generated At Tue, 12 May 2026 19:36:11 GMT-->
<link:linkbase xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance" 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/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" />
  <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-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/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" />
  <link:roleRef roleURI="http://www.highroller.com/role/statement-document-and-entity-information" xlink:type="simple" xlink:href="rolr-20260331.xsd#statement-document-and-entity-information" />
  <link:roleRef roleURI="http://www.highroller.com/role/SHAREBASEDCOMPENSATIONTables" xlink:type="simple" xlink:href="rolr-20260331.xsd#SHAREBASEDCOMPENSATIONTables" />
  <link:roleRef roleURI="http://www.highroller.com/role/CASHANDCASHEQUIVALENTSScheduleofCashandCashEquivalentsandRestrictedCashByCountryDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#CASHANDCASHEQUIVALENTSScheduleofCashandCashEquivalentsandRestrictedCashByCountryDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/SHAREBASEDCOMPENSATIONScheduleofStockSharebasedCompensationDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#SHAREBASEDCOMPENSATIONScheduleofStockSharebasedCompensationDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/NETINCOMELOSSPERSHAREScheduleofAntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#NETINCOMELOSSPERSHAREScheduleofAntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/RELATEDPARTYTRANSACTIONSComponentsofRelatedPartyBalancesDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#RELATEDPARTYTRANSACTIONSComponentsofRelatedPartyBalancesDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/LEASESDetailsTextual" xlink:type="simple" xlink:href="rolr-20260331.xsd#LEASESDetailsTextual" />
  <link:roleRef roleURI="http://www.highroller.com/role/LEASESRightofuseAssetsDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#LEASESRightofuseAssetsDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/SHAREBASEDCOMPENSATIONScheduleofWarrantActivityDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#SHAREBASEDCOMPENSATIONScheduleofWarrantActivityDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/SHAREBASEDCOMPENSATIONScheduleofRestrictedStockUnitActivityDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#SHAREBASEDCOMPENSATIONScheduleofRestrictedStockUnitActivityDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/INTANGIBLEASSETSNETSummaryofIntangibleAssetsDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#INTANGIBLEASSETSNETSummaryofIntangibleAssetsDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/INCOMETAXESDetailsTextual" xlink:type="simple" xlink:href="rolr-20260331.xsd#INCOMETAXESDetailsTextual" />
  <link:roleRef roleURI="http://www.highroller.com/role/REVENUERevenueByGeographicalLocationDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#REVENUERevenueByGeographicalLocationDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSSUnaudited" xlink:type="simple" xlink:href="rolr-20260331.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSSUnaudited" />
  <link:roleRef roleURI="http://www.highroller.com/role/REVENUEComponentsofDisaggregatedRevenueDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#REVENUEComponentsofDisaggregatedRevenueDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESDetailsTextual" xlink:type="simple" xlink:href="rolr-20260331.xsd#SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESDetailsTextual" />
  <link:roleRef roleURI="http://www.highroller.com/role/SHAREBASEDCOMPENSATIONOptionsAwardAssumptionsDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#SHAREBASEDCOMPENSATIONOptionsAwardAssumptionsDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITYUnaudited" xlink:type="simple" xlink:href="rolr-20260331.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITYUnaudited" />
  <link:roleRef roleURI="http://www.highroller.com/role/DISCONTINUEDOPERATIONSDetailsNarrative" xlink:type="simple" xlink:href="rolr-20260331.xsd#DISCONTINUEDOPERATIONSDetailsNarrative" />
  <link:roleRef roleURI="http://www.highroller.com/role/DISCONTINUEDOPERATIONSScheduleofnetincomelossfromdiscontinuedoperationsDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#DISCONTINUEDOPERATIONSScheduleofnetincomelossfromdiscontinuedoperationsDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/RELATEDPARTYTRANSACTIONSDetailsTextual" xlink:type="simple" xlink:href="rolr-20260331.xsd#RELATEDPARTYTRANSACTIONSDetailsTextual" />
  <link:roleRef roleURI="http://www.highroller.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSUnaudited" xlink:type="simple" xlink:href="rolr-20260331.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETSUnaudited" />
  <link:roleRef roleURI="http://www.highroller.com/role/SUBSEQUENTEVENTSDetailsNarrative" xlink:type="simple" xlink:href="rolr-20260331.xsd#SUBSEQUENTEVENTSDetailsNarrative" />
  <link:roleRef roleURI="http://www.highroller.com/role/SHAREBASEDCOMPENSATIONDetailsTextual" xlink:type="simple" xlink:href="rolr-20260331.xsd#SHAREBASEDCOMPENSATIONDetailsTextual" />
  <link:roleRef roleURI="http://www.highroller.com/role/NATUREOFOPERATIONSDetailsTextual" xlink:type="simple" xlink:href="rolr-20260331.xsd#NATUREOFOPERATIONSDetailsTextual" />
  <link:roleRef roleURI="http://www.highroller.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSUnauditedParentheticals" xlink:type="simple" xlink:href="rolr-20260331.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETSUnauditedParentheticals" />
  <link:roleRef roleURI="http://www.highroller.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSUnaudited" xlink:type="simple" xlink:href="rolr-20260331.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSUnaudited" />
  <link:roleRef roleURI="http://www.highroller.com/role/NATUREOFOPERATIONS" xlink:type="simple" xlink:href="rolr-20260331.xsd#NATUREOFOPERATIONS" />
  <link:roleRef roleURI="http://www.highroller.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES" xlink:type="simple" xlink:href="rolr-20260331.xsd#SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES" />
  <link:roleRef roleURI="http://www.highroller.com/role/REVENUE" xlink:type="simple" xlink:href="rolr-20260331.xsd#REVENUE" />
  <link:roleRef roleURI="http://www.highroller.com/role/CASHANDCASHEQUIVALENTS" xlink:type="simple" xlink:href="rolr-20260331.xsd#CASHANDCASHEQUIVALENTS" />
  <link:roleRef roleURI="http://www.highroller.com/role/PREPAIDEXPENSESANDOTHERCURRENTASSETS" xlink:type="simple" xlink:href="rolr-20260331.xsd#PREPAIDEXPENSESANDOTHERCURRENTASSETS" />
  <link:roleRef roleURI="http://www.highroller.com/role/INTANGIBLEASSETSNET" xlink:type="simple" xlink:href="rolr-20260331.xsd#INTANGIBLEASSETSNET" />
  <link:roleRef roleURI="http://www.highroller.com/role/PROPERTYANDEQUIPMENT" xlink:type="simple" xlink:href="rolr-20260331.xsd#PROPERTYANDEQUIPMENT" />
  <link:roleRef roleURI="http://www.highroller.com/role/ACCRUEDEXPENSES" xlink:type="simple" xlink:href="rolr-20260331.xsd#ACCRUEDEXPENSES" />
  <link:roleRef roleURI="http://www.highroller.com/role/STOCKHOLDERSEQUITY" xlink:type="simple" xlink:href="rolr-20260331.xsd#STOCKHOLDERSEQUITY" />
  <link:roleRef roleURI="http://www.highroller.com/role/NETGAINLOSSPERSHARE" xlink:type="simple" xlink:href="rolr-20260331.xsd#NETGAINLOSSPERSHARE" />
  <link:roleRef roleURI="http://www.highroller.com/role/SHAREBASEDCOMPENSATION" xlink:type="simple" xlink:href="rolr-20260331.xsd#SHAREBASEDCOMPENSATION" />
  <link:roleRef roleURI="http://www.highroller.com/role/RELATEDPARTYTRANSACTIONS" xlink:type="simple" xlink:href="rolr-20260331.xsd#RELATEDPARTYTRANSACTIONS" />
  <link:roleRef roleURI="http://www.highroller.com/role/INCOMETAXES" xlink:type="simple" xlink:href="rolr-20260331.xsd#INCOMETAXES" />
  <link:roleRef roleURI="http://www.highroller.com/role/COMMITMENTANDCONTINGENCIES" xlink:type="simple" xlink:href="rolr-20260331.xsd#COMMITMENTANDCONTINGENCIES" />
  <link:roleRef roleURI="http://www.highroller.com/role/LEASES" xlink:type="simple" xlink:href="rolr-20260331.xsd#LEASES" />
  <link:roleRef roleURI="http://www.highroller.com/role/SEGMENTREPORTING" xlink:type="simple" xlink:href="rolr-20260331.xsd#SEGMENTREPORTING" />
  <link:roleRef roleURI="http://www.highroller.com/role/DISCONTINUEDOPERATIONS" xlink:type="simple" xlink:href="rolr-20260331.xsd#DISCONTINUEDOPERATIONS" />
  <link:roleRef roleURI="http://www.highroller.com/role/SUBSEQUENTEVENTS" xlink:type="simple" xlink:href="rolr-20260331.xsd#SUBSEQUENTEVENTS" />
  <link:roleRef roleURI="http://www.highroller.com/role/SIGNIFICANTACCOUNTINGPOLICIESPolicies" xlink:type="simple" xlink:href="rolr-20260331.xsd#SIGNIFICANTACCOUNTINGPOLICIESPolicies" />
  <link:roleRef roleURI="http://www.highroller.com/role/REVENUETables" xlink:type="simple" xlink:href="rolr-20260331.xsd#REVENUETables" />
  <link:roleRef roleURI="http://www.highroller.com/role/CASHANDCASHEQUIVALENTSTables" xlink:type="simple" xlink:href="rolr-20260331.xsd#CASHANDCASHEQUIVALENTSTables" />
  <link:roleRef roleURI="http://www.highroller.com/role/PREPAIDEXPENSESANDOTHERCURRENTASSETSTables" xlink:type="simple" xlink:href="rolr-20260331.xsd#PREPAIDEXPENSESANDOTHERCURRENTASSETSTables" />
  <link:roleRef roleURI="http://www.highroller.com/role/INTANGIBLEASSETSNETTables" xlink:type="simple" xlink:href="rolr-20260331.xsd#INTANGIBLEASSETSNETTables" />
  <link:roleRef roleURI="http://www.highroller.com/role/PROPERTYANDEQUIPMENTTables" xlink:type="simple" xlink:href="rolr-20260331.xsd#PROPERTYANDEQUIPMENTTables" />
  <link:roleRef roleURI="http://www.highroller.com/role/ACCRUEDEXPENSESTables" xlink:type="simple" xlink:href="rolr-20260331.xsd#ACCRUEDEXPENSESTables" />
  <link:roleRef roleURI="http://www.highroller.com/role/NETINCOMELOSSPERSHARETables" xlink:type="simple" xlink:href="rolr-20260331.xsd#NETINCOMELOSSPERSHARETables" />
  <link:roleRef roleURI="http://www.highroller.com/role/RELATEDPARTYTRANSACTIONSTables" xlink:type="simple" xlink:href="rolr-20260331.xsd#RELATEDPARTYTRANSACTIONSTables" />
  <link:roleRef roleURI="http://www.highroller.com/role/LEASESTables" xlink:type="simple" xlink:href="rolr-20260331.xsd#LEASESTables" />
  <link:roleRef roleURI="http://www.highroller.com/role/SEGMENTREPORTINGTables" xlink:type="simple" xlink:href="rolr-20260331.xsd#SEGMENTREPORTINGTables" />
  <link:roleRef roleURI="http://www.highroller.com/role/DISCONTINUEDOPERATIONSTables" xlink:type="simple" xlink:href="rolr-20260331.xsd#DISCONTINUEDOPERATIONSTables" />
  <link:roleRef roleURI="http://www.highroller.com/role/CASHANDCASHEQUIVALENTSReconciliationofCashandCashEquivalentsDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#CASHANDCASHEQUIVALENTSReconciliationofCashandCashEquivalentsDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/PREPAIDEXPENSESANDOTHERCURRENTASSETSScheduleofPrepaidExpensesandOtherCurrentAssetsDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#PREPAIDEXPENSESANDOTHERCURRENTASSETSScheduleofPrepaidExpensesandOtherCurrentAssetsDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/INTANGIBLEASSETSNETDetailsTextual" xlink:type="simple" xlink:href="rolr-20260331.xsd#INTANGIBLEASSETSNETDetailsTextual" />
  <link:roleRef roleURI="http://www.highroller.com/role/PROPERTYANDEQUIPMENTDetailsTextual" xlink:type="simple" xlink:href="rolr-20260331.xsd#PROPERTYANDEQUIPMENTDetailsTextual" />
  <link:roleRef roleURI="http://www.highroller.com/role/PROPERTYANDEQUIPMENTScheduleofPropertyPlantandEquipmentDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#PROPERTYANDEQUIPMENTScheduleofPropertyPlantandEquipmentDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/ACCRUEDEXPENSESDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#ACCRUEDEXPENSESDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/STOCKHOLDERSEQUITYDetailsTextual" xlink:type="simple" xlink:href="rolr-20260331.xsd#STOCKHOLDERSEQUITYDetailsTextual" />
  <link:roleRef roleURI="http://www.highroller.com/role/NETINCOMELOSSPERSHAREScheduleofEarningsPerShareDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#NETINCOMELOSSPERSHAREScheduleofEarningsPerShareDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/SHAREBASEDCOMPENSATIONScheduleofStockOptionActivityDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#SHAREBASEDCOMPENSATIONScheduleofStockOptionActivityDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/LEASESMaturityOfLeasesDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#LEASESMaturityOfLeasesDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/LEASESMaturityOfLeasesDetailsCalc2" xlink:type="simple" xlink:href="rolr-20260331.xsd#LEASESMaturityOfLeasesDetailsCalc2" />
  <link:roleRef roleURI="http://www.highroller.com/role/SEGMENTREPORTINGDetailsTextual" xlink:type="simple" xlink:href="rolr-20260331.xsd#SEGMENTREPORTINGDetailsTextual" />
  <link:roleRef roleURI="http://www.highroller.com/role/SEGMENTREPORTINGFinancialResultsDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#SEGMENTREPORTINGFinancialResultsDetails" />
  <link:roleRef roleURI="http://www.highroller.com/role/DISCONTINUEDOPERATIONSScheduleofcashflowsfromoperationsandinvestingofdiscontinuedoperationsDetails" xlink:type="simple" xlink:href="rolr-20260331.xsd#DISCONTINUEDOPERATIONSScheduleofcashflowsfromoperationsandinvestingofdiscontinuedoperationsDetails" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/statement-document-and-entity-information">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems" xlink:label="dei_DocumentInformationLineItems" xlink:title="dei_DocumentInformationLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationTable" xlink:label="dei_DocumentInformationTable" xlink:title="dei_DocumentInformationTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentInformationTable" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentInformationTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey" xlink:title="dei_EntityCentralIndexKey" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityCentralIndexKey" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityCentralIndexKey" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName" xlink:title="dei_EntityRegistrantName" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityRegistrantName" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityRegistrantName" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag" xlink:title="dei_AmendmentFlag" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AmendmentFlag" xlink:title="Definition : dei_DocumentInformationLineItems to dei_AmendmentFlag" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate" xlink:title="dei_CurrentFiscalYearEndDate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_CurrentFiscalYearEndDate" xlink:title="Definition : dei_DocumentInformationLineItems to dei_CurrentFiscalYearEndDate" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus" xlink:title="dei_DocumentFiscalPeriodFocus" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentFiscalPeriodFocus" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentFiscalPeriodFocus" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus" xlink:title="dei_DocumentFiscalYearFocus" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentFiscalYearFocus" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentFiscalYearFocus" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="dei_DocumentType" xlink:title="dei_DocumentType" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentType" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentType" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentQuarterlyReport" xlink:label="dei_DocumentQuarterlyReport" xlink:title="dei_DocumentQuarterlyReport" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentQuarterlyReport" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentQuarterlyReport" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate" xlink:title="dei_DocumentPeriodEndDate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentPeriodEndDate" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentPeriodEndDate" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport" xlink:label="dei_DocumentTransitionReport" xlink:title="dei_DocumentTransitionReport" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentTransitionReport" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentTransitionReport" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber" xlink:label="dei_EntityFileNumber" xlink:title="dei_EntityFileNumber" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityFileNumber" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityFileNumber" xlink:type="arc" use="optional" order="11" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="dei_EntityIncorporationStateCountryCode" xlink:title="dei_EntityIncorporationStateCountryCode" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityIncorporationStateCountryCode" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityIncorporationStateCountryCode" xlink:type="arc" use="optional" order="12" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber" xlink:label="dei_EntityTaxIdentificationNumber" xlink:title="dei_EntityTaxIdentificationNumber" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityTaxIdentificationNumber" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityTaxIdentificationNumber" xlink:type="arc" use="optional" order="13" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1" xlink:label="dei_EntityAddressAddressLine1" xlink:title="dei_EntityAddressAddressLine1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressAddressLine1" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityAddressAddressLine1" xlink:type="arc" use="optional" order="14" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown" xlink:label="dei_EntityAddressCityOrTown" xlink:title="dei_EntityAddressCityOrTown" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressCityOrTown" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityAddressCityOrTown" xlink:type="arc" use="optional" order="15" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince" xlink:label="dei_EntityAddressStateOrProvince" xlink:title="dei_EntityAddressStateOrProvince" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressStateOrProvince" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityAddressStateOrProvince" xlink:type="arc" use="optional" order="16" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode" xlink:label="dei_EntityAddressPostalZipCode" xlink:title="dei_EntityAddressPostalZipCode" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressPostalZipCode" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityAddressPostalZipCode" xlink:type="arc" use="optional" order="17" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode" xlink:label="dei_CityAreaCode" xlink:title="dei_CityAreaCode" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_CityAreaCode" xlink:title="Definition : dei_DocumentInformationLineItems to dei_CityAreaCode" xlink:type="arc" use="optional" order="18" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber" xlink:label="dei_LocalPhoneNumber" xlink:title="dei_LocalPhoneNumber" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_LocalPhoneNumber" xlink:title="Definition : dei_DocumentInformationLineItems to dei_LocalPhoneNumber" xlink:type="arc" use="optional" order="19" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle" xlink:label="dei_Security12bTitle" xlink:title="dei_Security12bTitle" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_Security12bTitle" xlink:title="Definition : dei_DocumentInformationLineItems to dei_Security12bTitle" xlink:type="arc" use="optional" order="20" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol" xlink:title="dei_TradingSymbol" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_TradingSymbol" xlink:title="Definition : dei_DocumentInformationLineItems to dei_TradingSymbol" xlink:type="arc" use="optional" order="21" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName" xlink:label="dei_SecurityExchangeName" xlink:title="dei_SecurityExchangeName" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_SecurityExchangeName" xlink:title="Definition : dei_DocumentInformationLineItems to dei_SecurityExchangeName" xlink:type="arc" use="optional" order="22" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus" xlink:label="dei_EntityCurrentReportingStatus" xlink:title="dei_EntityCurrentReportingStatus" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityCurrentReportingStatus" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityCurrentReportingStatus" xlink:type="arc" use="optional" order="23" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent" xlink:label="dei_EntityInteractiveDataCurrent" xlink:title="dei_EntityInteractiveDataCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityInteractiveDataCurrent" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityInteractiveDataCurrent" xlink:type="arc" use="optional" order="24" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory" xlink:title="dei_EntityFilerCategory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityFilerCategory" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityFilerCategory" xlink:type="arc" use="optional" order="25" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitySmallBusiness" xlink:label="dei_EntitySmallBusiness" xlink:title="dei_EntitySmallBusiness" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntitySmallBusiness" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntitySmallBusiness" xlink:type="arc" use="optional" order="26" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany" xlink:title="dei_EntityEmergingGrowthCompany" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityEmergingGrowthCompany" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityEmergingGrowthCompany" xlink:type="arc" use="optional" order="27" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityExTransitionPeriod" xlink:label="dei_EntityExTransitionPeriod" xlink:title="dei_EntityExTransitionPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityExTransitionPeriod" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityExTransitionPeriod" xlink:type="arc" use="optional" order="28" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany" xlink:label="dei_EntityShellCompany" xlink:title="dei_EntityShellCompany" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityShellCompany" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityShellCompany" xlink:type="arc" use="optional" order="29" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="dei_EntityCommonStockSharesOutstanding" xlink:title="dei_EntityCommonStockSharesOutstanding" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityCommonStockSharesOutstanding" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityCommonStockSharesOutstanding" xlink:type="arc" use="optional" order="30" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SHAREBASEDCOMPENSATIONTables">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:title="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:title="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:title="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:label="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:title="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="arc" order="4" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis" xlink:title="us-gaap_AwardTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_AwardTypeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_AwardTypeAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="us-gaap_RestrictedStockUnitsRSUMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_RestrictedStockUnitsRSUMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="us-gaap_EmployeeStockOptionMember" xlink:title="us-gaap_EmployeeStockOptionMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_EmployeeStockOptionMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_EmployeeStockOptionMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember" xlink:title="us-gaap_WarrantMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_WarrantMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_WarrantMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/CASHANDCASHEQUIVALENTSScheduleofCashandCashEquivalentsandRestrictedCashByCountryDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsLineItems" xlink:label="us-gaap_CashAndCashEquivalentsLineItems" xlink:title="us-gaap_CashAndCashEquivalentsLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:title="us-gaap_CashAndCashEquivalentsAtCarryingValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CashAndCashEquivalentsLineItems" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:title="Definition : us-gaap_CashAndCashEquivalentsLineItems to us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashCurrent" xlink:label="us-gaap_RestrictedCashCurrent" xlink:title="us-gaap_RestrictedCashCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CashAndCashEquivalentsLineItems" xlink:to="us-gaap_RestrictedCashCurrent" xlink:title="Definition : us-gaap_CashAndCashEquivalentsLineItems to us-gaap_RestrictedCashCurrent" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:title="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CashAndCashEquivalentsLineItems" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:title="Definition : us-gaap_CashAndCashEquivalentsLineItems to us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfCashAndCashEquivalentsTable" xlink:label="us-gaap_ScheduleOfCashAndCashEquivalentsTable" xlink:title="us-gaap_ScheduleOfCashAndCashEquivalentsTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_CashAndCashEquivalentsLineItems" xlink:to="us-gaap_ScheduleOfCashAndCashEquivalentsTable" xlink:title="Definition : us-gaap_CashAndCashEquivalentsLineItems to us-gaap_ScheduleOfCashAndCashEquivalentsTable" xlink:type="arc" order="3" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis" xlink:label="srt_StatementGeographicalAxis" xlink:title="srt_StatementGeographicalAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfCashAndCashEquivalentsTable" xlink:to="srt_StatementGeographicalAxis" xlink:title="Definition : us-gaap_ScheduleOfCashAndCashEquivalentsTable to srt_StatementGeographicalAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain" xlink:title="srt_SegmentGeographicalDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_MT" xlink:label="country_MT" xlink:title="country_MT" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_MT" xlink:title="Definition : srt_SegmentGeographicalDomain to country_MT" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_FI" xlink:label="country_FI" xlink:title="country_FI" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_FI" xlink:title="Definition : srt_SegmentGeographicalDomain to country_FI" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CH" xlink:label="country_CH" xlink:title="country_CH" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_CH" xlink:title="Definition : srt_SegmentGeographicalDomain to country_CH" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_GB" xlink:label="country_GB" xlink:title="country_GB" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_GB" xlink:title="Definition : srt_SegmentGeographicalDomain to country_GB" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US" xlink:label="country_US" xlink:title="country_US" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_US" xlink:title="Definition : srt_SegmentGeographicalDomain to country_US" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CY" xlink:label="country_CY" xlink:title="country_CY" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_CY" xlink:title="Definition : srt_SegmentGeographicalDomain to country_CY" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_LT" xlink:label="country_LT" xlink:title="country_LT" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_LT" xlink:title="Definition : srt_SegmentGeographicalDomain to country_LT" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_OtherMember" xlink:label="rolr_OtherMember" xlink:title="rolr_OtherMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="rolr_OtherMember" xlink:title="Definition : srt_SegmentGeographicalDomain to rolr_OtherMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_DK" xlink:label="country_DK" xlink:title="country_DK" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_DK" xlink:title="Definition : srt_SegmentGeographicalDomain to country_DK" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain_1" xlink:title="srt_SegmentGeographicalDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain_1" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SHAREBASEDCOMPENSATIONScheduleofStockSharebasedCompensationDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense" xlink:title="us-gaap_AllocatedShareBasedCompensationExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_AllocatedShareBasedCompensationExpense" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_AllocatedShareBasedCompensationExpense" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis" xlink:title="us-gaap_AwardTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_AwardTypeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_AwardTypeAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="us-gaap_EmployeeStockOptionMember" xlink:title="us-gaap_EmployeeStockOptionMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_EmployeeStockOptionMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_EmployeeStockOptionMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="us-gaap_RestrictedStockUnitsRSUMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_RestrictedStockUnitsRSUMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis" xlink:title="us-gaap_IncomeStatementLocationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_IncomeStatementLocationAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_IncomeStatementLocationAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpenseMember" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember" xlink:title="us-gaap_GeneralAndAdministrativeExpenseMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_GeneralAndAdministrativeExpenseMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_GeneralAndAdministrativeExpenseMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingAndMarketingExpenseMember" xlink:label="us-gaap_SellingAndMarketingExpenseMember" xlink:title="us-gaap_SellingAndMarketingExpenseMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_SellingAndMarketingExpenseMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_SellingAndMarketingExpenseMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember" xlink:title="us-gaap_ResearchAndDevelopmentExpenseMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_ResearchAndDevelopmentExpenseMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_ResearchAndDevelopmentExpenseMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain_1" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain_1" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/NETINCOMELOSSPERSHAREScheduleofAntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:title="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:title="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:title="Definition : us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems to us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:title="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:to="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:title="Definition : us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems to us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:title="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:title="Definition : us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable to us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain" xlink:title="us-gaap_AntidilutiveSecuritiesNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:to="us-gaap_AntidilutiveSecuritiesNameDomain" xlink:title="Definition : us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis to us-gaap_AntidilutiveSecuritiesNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="us-gaap_EmployeeStockOptionMember" xlink:title="us-gaap_EmployeeStockOptionMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AntidilutiveSecuritiesNameDomain" xlink:to="us-gaap_EmployeeStockOptionMember" xlink:title="Definition : us-gaap_AntidilutiveSecuritiesNameDomain to us-gaap_EmployeeStockOptionMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="us-gaap_RestrictedStockUnitsRSUMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AntidilutiveSecuritiesNameDomain" xlink:to="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="Definition : us-gaap_AntidilutiveSecuritiesNameDomain to us-gaap_RestrictedStockUnitsRSUMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember" xlink:title="us-gaap_WarrantMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AntidilutiveSecuritiesNameDomain" xlink:to="us-gaap_WarrantMember" xlink:title="Definition : us-gaap_AntidilutiveSecuritiesNameDomain to us-gaap_WarrantMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_1" xlink:title="us-gaap_AntidilutiveSecuritiesNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:to="us-gaap_AntidilutiveSecuritiesNameDomain_1" xlink:title="Definition : us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis to us-gaap_AntidilutiveSecuritiesNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/RELATEDPARTYTRANSACTIONSComponentsofRelatedPartyBalancesDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems" xlink:title="us-gaap_RelatedPartyTransactionLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetNoncurrent" xlink:label="us-gaap_AccountsReceivableNetNoncurrent" xlink:title="us-gaap_AccountsReceivableNetNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_AccountsReceivableNetNoncurrent" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_AccountsReceivableNetNoncurrent" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent" xlink:label="us-gaap_AccountsPayableCurrent" xlink:title="us-gaap_AccountsPayableCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_AccountsPayableCurrent" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_AccountsPayableCurrent" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:title="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="arc" order="2" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_SpikeUpMember" xlink:label="rolr_SpikeUpMember" xlink:title="rolr_SpikeUpMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="rolr_SpikeUpMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to rolr_SpikeUpMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_HappyHourEntertainmentHoldingsMember" xlink:label="rolr_HappyHourEntertainmentHoldingsMember" xlink:title="rolr_HappyHourEntertainmentHoldingsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="rolr_HappyHourEntertainmentHoldingsMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to rolr_HappyHourEntertainmentHoldingsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAffiliatesMember" xlink:label="us-gaap_OtherAffiliatesMember" xlink:title="us-gaap_OtherAffiliatesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_OtherAffiliatesMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_OtherAffiliatesMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember" xlink:title="us-gaap_RelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_RelatedPartyMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_HappyHourSolutionsMember" xlink:label="rolr_HappyHourSolutionsMember" xlink:title="rolr_HappyHourSolutionsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="rolr_HappyHourSolutionsMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to rolr_HappyHourSolutionsMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/LEASESDetailsTextual">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems" xlink:title="us-gaap_LesseeLeaseDescriptionLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseTermOfContract" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract" xlink:title="us-gaap_LesseeOperatingLeaseTermOfContract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_LesseeOperatingLeaseTermOfContract" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to us-gaap_LesseeOperatingLeaseTermOfContract" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_LesseeOperatingLeaseOptionToTerminateTerm" xlink:label="rolr_LesseeOperatingLeaseOptionToTerminateTerm" xlink:title="rolr_LesseeOperatingLeaseOptionToTerminateTerm" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="rolr_LesseeOperatingLeaseOptionToTerminateTerm" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to rolr_LesseeOperatingLeaseOptionToTerminateTerm" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_OperatingLeaseMonthlyPayments" xlink:label="rolr_OperatingLeaseMonthlyPayments" xlink:title="rolr_OperatingLeaseMonthlyPayments" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="rolr_OperatingLeaseMonthlyPayments" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to rolr_OperatingLeaseMonthlyPayments" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_OperatingLeaseAnnualRateIncreasePercentage" xlink:label="rolr_OperatingLeaseAnnualRateIncreasePercentage" xlink:title="rolr_OperatingLeaseAnnualRateIncreasePercentage" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="rolr_OperatingLeaseAnnualRateIncreasePercentage" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to rolr_OperatingLeaseAnnualRateIncreasePercentage" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseExpense" xlink:label="us-gaap_OperatingLeaseExpense" xlink:title="us-gaap_OperatingLeaseExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_OperatingLeaseExpense" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to us-gaap_OperatingLeaseExpense" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:title="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:title="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:label="us-gaap_LesseeLeaseDescriptionTable" xlink:title="us-gaap_LesseeLeaseDescriptionTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_LesseeLeaseDescriptionTable" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to us-gaap_LesseeLeaseDescriptionTable" xlink:type="arc" order="7" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis" xlink:label="srt_StatementGeographicalAxis" xlink:title="srt_StatementGeographicalAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_LesseeLeaseDescriptionTable" xlink:to="srt_StatementGeographicalAxis" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionTable to srt_StatementGeographicalAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain" xlink:title="srt_SegmentGeographicalDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_MT" xlink:label="country_MT" xlink:title="country_MT" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_MT" xlink:title="Definition : srt_SegmentGeographicalDomain to country_MT" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain_1" xlink:title="srt_SegmentGeographicalDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain_1" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/LEASESRightofuseAssetsDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems" xlink:title="us-gaap_LesseeLeaseDescriptionLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset" xlink:title="us-gaap_OperatingLeaseRightOfUseAsset" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to us-gaap_OperatingLeaseRightOfUseAsset" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:label="us-gaap_LesseeLeaseDescriptionTable" xlink:title="us-gaap_LesseeLeaseDescriptionTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_LesseeLeaseDescriptionTable" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to us-gaap_LesseeLeaseDescriptionTable" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis" xlink:label="srt_StatementGeographicalAxis" xlink:title="srt_StatementGeographicalAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_LesseeLeaseDescriptionTable" xlink:to="srt_StatementGeographicalAxis" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionTable to srt_StatementGeographicalAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain" xlink:title="srt_SegmentGeographicalDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_MT" xlink:label="country_MT" xlink:title="country_MT" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_MT" xlink:title="Definition : srt_SegmentGeographicalDomain to country_MT" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain_1" xlink:title="srt_SegmentGeographicalDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain_1" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SHAREBASEDCOMPENSATIONScheduleofWarrantActivityDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_SharebasedCompensationArrangementsBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="rolr_SharebasedCompensationArrangementsBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:title="rolr_SharebasedCompensationArrangementsBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisePrice" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="rolr_SharebasedCompensationArrangementsBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to rolr_SharebasedCompensationArrangementsBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageRemainingContractualTerms" xlink:label="rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageRemainingContractualTerms" xlink:title="rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageRemainingContractualTerms" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageRemainingContractualTerms" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageRemainingContractualTerms" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_SharebasedCompensationArrangementsBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="rolr_SharebasedCompensationArrangementsBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:title="rolr_SharebasedCompensationArrangementsBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesInPeriodWeightedAverageExercisePrice" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="rolr_SharebasedCompensationArrangementsBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to rolr_SharebasedCompensationArrangementsBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExpirations" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExpirations" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExpirations" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExpirations" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExpirations" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_SharebasedCompensationArrangementsBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="rolr_SharebasedCompensationArrangementsBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:title="rolr_SharebasedCompensationArrangementsBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpirationsInPeriodWeightedAverageExercisePrice" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="rolr_SharebasedCompensationArrangementsBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to rolr_SharebasedCompensationArrangementsBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageExercisePrice" xlink:label="rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageExercisePrice" xlink:title="rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageExercisePrice" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageExercisePrice" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageExercisePrice" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardNonoptionEquityInstrumentsExercisableNumber" xlink:label="rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardNonoptionEquityInstrumentsExercisableNumber" xlink:title="rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardNonoptionEquityInstrumentsExercisableNumber" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardNonoptionEquityInstrumentsExercisableNumber" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardNonoptionEquityInstrumentsExercisableNumber" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageExercisePrice" xlink:label="rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageExercisePrice" xlink:title="rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageExercisePrice" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageExercisePrice" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageExercisePrice" xlink:type="arc" use="optional" order="11" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageRemainingContractualTerms" xlink:label="rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageRemainingContractualTerms" xlink:title="rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageRemainingContractualTerms" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageRemainingContractualTerms" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to rolr_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageRemainingContractualTerms" xlink:type="arc" use="optional" order="12" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="arc" order="13" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis" xlink:title="us-gaap_AwardTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_AwardTypeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_AwardTypeAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember" xlink:title="us-gaap_WarrantMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_WarrantMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_WarrantMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SHAREBASEDCOMPENSATIONScheduleofRestrictedStockUnitActivityDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="arc" order="8" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis" xlink:title="us-gaap_AwardTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_AwardTypeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_AwardTypeAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="us-gaap_RestrictedStockUnitsRSUMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_RestrictedStockUnitsRSUMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/INTANGIBLEASSETSNETSummaryofIntangibleAssetsDetails">
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_IntangibleAssetsNetLineItems" xlink:label="rolr_IntangibleAssetsNetLineItems" xlink:title="rolr_IntangibleAssetsNetLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" xlink:title="us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_IntangibleAssetsNetLineItems" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" xlink:title="Definition : rolr_IntangibleAssetsNetLineItems to us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_IndefiniteLivedIntangibleAssetNet" xlink:label="rolr_IndefiniteLivedIntangibleAssetNet" xlink:title="rolr_IndefiniteLivedIntangibleAssetNet" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_IntangibleAssetsNetLineItems" xlink:to="rolr_IndefiniteLivedIntangibleAssetNet" xlink:title="Definition : rolr_IntangibleAssetsNetLineItems to rolr_IndefiniteLivedIntangibleAssetNet" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_IntangibleAssetsAccumulatedImpairment" xlink:label="rolr_IntangibleAssetsAccumulatedImpairment" xlink:title="rolr_IntangibleAssetsAccumulatedImpairment" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_IntangibleAssetsNetLineItems" xlink:to="rolr_IntangibleAssetsAccumulatedImpairment" xlink:title="Definition : rolr_IntangibleAssetsNetLineItems to rolr_IntangibleAssetsAccumulatedImpairment" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:title="us-gaap_FiniteLivedIntangibleAssetUsefulLife" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_IntangibleAssetsNetLineItems" xlink:to="us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:title="Definition : rolr_IntangibleAssetsNetLineItems to us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross" xlink:title="us-gaap_FiniteLivedIntangibleAssetsGross" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_IntangibleAssetsNetLineItems" xlink:to="us-gaap_FiniteLivedIntangibleAssetsGross" xlink:title="Definition : rolr_IntangibleAssetsNetLineItems to us-gaap_FiniteLivedIntangibleAssetsGross" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:title="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_IntangibleAssetsNetLineItems" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:title="Definition : rolr_IntangibleAssetsNetLineItems to us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet" xlink:title="us-gaap_FiniteLivedIntangibleAssetsNet" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_IntangibleAssetsNetLineItems" xlink:to="us-gaap_FiniteLivedIntangibleAssetsNet" xlink:title="Definition : rolr_IntangibleAssetsNetLineItems to us-gaap_FiniteLivedIntangibleAssetsNet" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill" xlink:label="us-gaap_IntangibleAssetsGrossExcludingGoodwill" xlink:title="us-gaap_IntangibleAssetsGrossExcludingGoodwill" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_IntangibleAssetsNetLineItems" xlink:to="us-gaap_IntangibleAssetsGrossExcludingGoodwill" xlink:title="Definition : rolr_IntangibleAssetsNetLineItems to us-gaap_IntangibleAssetsGrossExcludingGoodwill" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:title="us-gaap_IntangibleAssetsNetExcludingGoodwill" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_IntangibleAssetsNetLineItems" xlink:to="us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:title="Definition : rolr_IntangibleAssetsNetLineItems to us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_IntangibleAssetsNetTable" xlink:label="rolr_IntangibleAssetsNetTable" xlink:title="rolr_IntangibleAssetsNetTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="rolr_IntangibleAssetsNetLineItems" xlink:to="rolr_IntangibleAssetsNetTable" xlink:title="Definition : rolr_IntangibleAssetsNetLineItems to rolr_IntangibleAssetsNetTable" xlink:type="arc" order="9" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:title="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="rolr_IntangibleAssetsNetTable" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:title="Definition : rolr_IntangibleAssetsNetTable to us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:title="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:title="Definition : us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis to us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_DomainNamesMember" xlink:label="rolr_DomainNamesMember" xlink:title="rolr_DomainNamesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="rolr_DomainNamesMember" xlink:title="Definition : us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain to rolr_DomainNamesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TrademarksMember" xlink:label="us-gaap_TrademarksMember" xlink:title="us-gaap_TrademarksMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_TrademarksMember" xlink:title="Definition : us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain to us-gaap_TrademarksMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LicenseMember" xlink:label="us-gaap_LicenseMember" xlink:title="us-gaap_LicenseMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_LicenseMember" xlink:title="Definition : us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain to us-gaap_LicenseMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_1" xlink:title="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_1" xlink:title="Definition : us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis to us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:title="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="rolr_IntangibleAssetsNetTable" xlink:to="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:title="Definition : rolr_IntangibleAssetsNetTable to us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:title="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:title="Definition : us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis to us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:label="us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:title="us-gaap_ComputerSoftwareIntangibleAssetMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:title="Definition : us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain to us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1" xlink:title="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1" xlink:title="Definition : us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis to us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/INCOMETAXESDetailsTextual">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationLineItems" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationLineItems" xlink:title="us-gaap_EffectiveIncomeTaxRateReconciliationLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit" xlink:title="us-gaap_IncomeTaxExpenseBenefit" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationLineItems" xlink:to="us-gaap_IncomeTaxExpenseBenefit" xlink:title="Definition : us-gaap_EffectiveIncomeTaxRateReconciliationLineItems to us-gaap_IncomeTaxExpenseBenefit" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:title="us-gaap_EffectiveIncomeTaxRateContinuingOperations" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationLineItems" xlink:to="us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:title="Definition : us-gaap_EffectiveIncomeTaxRateReconciliationLineItems to us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:title="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationLineItems" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:title="Definition : us-gaap_EffectiveIncomeTaxRateReconciliationLineItems to us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="us-gaap_UnrecognizedTaxBenefits" xlink:title="us-gaap_UnrecognizedTaxBenefits" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationLineItems" xlink:to="us-gaap_UnrecognizedTaxBenefits" xlink:title="Definition : us-gaap_EffectiveIncomeTaxRateReconciliationLineItems to us-gaap_UnrecognizedTaxBenefits" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTable" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationTable" xlink:title="us-gaap_EffectiveIncomeTaxRateReconciliationTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationLineItems" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationTable" xlink:title="Definition : us-gaap_EffectiveIncomeTaxRateReconciliationLineItems to us-gaap_EffectiveIncomeTaxRateReconciliationTable" xlink:type="arc" order="4" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="us-gaap_IncomeTaxAuthorityAxis" xlink:title="us-gaap_IncomeTaxAuthorityAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationTable" xlink:to="us-gaap_IncomeTaxAuthorityAxis" xlink:title="Definition : us-gaap_EffectiveIncomeTaxRateReconciliationTable to us-gaap_IncomeTaxAuthorityAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="us-gaap_IncomeTaxAuthorityDomain" xlink:title="us-gaap_IncomeTaxAuthorityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeTaxAuthorityAxis" xlink:to="us-gaap_IncomeTaxAuthorityDomain" xlink:title="Definition : us-gaap_IncomeTaxAuthorityAxis to us-gaap_IncomeTaxAuthorityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCountryMember" xlink:label="us-gaap_ForeignCountryMember" xlink:title="us-gaap_ForeignCountryMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeTaxAuthorityDomain" xlink:to="us-gaap_ForeignCountryMember" xlink:title="Definition : us-gaap_IncomeTaxAuthorityDomain to us-gaap_ForeignCountryMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="us-gaap_IncomeTaxAuthorityDomain_1" xlink:title="us-gaap_IncomeTaxAuthorityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeTaxAuthorityAxis" xlink:to="us-gaap_IncomeTaxAuthorityDomain_1" xlink:title="Definition : us-gaap_IncomeTaxAuthorityAxis to us-gaap_IncomeTaxAuthorityDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/REVENUERevenueByGeographicalLocationDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskLineItems" xlink:label="us-gaap_ConcentrationRiskLineItems" xlink:title="us-gaap_ConcentrationRiskLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues" xlink:label="us-gaap_Revenues" xlink:title="us-gaap_Revenues" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ConcentrationRiskLineItems" xlink:to="us-gaap_Revenues" xlink:title="Definition : us-gaap_ConcentrationRiskLineItems to us-gaap_Revenues" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="us-gaap_ConcentrationRiskPercentage1" xlink:title="us-gaap_ConcentrationRiskPercentage1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ConcentrationRiskLineItems" xlink:to="us-gaap_ConcentrationRiskPercentage1" xlink:title="Definition : us-gaap_ConcentrationRiskLineItems to us-gaap_ConcentrationRiskPercentage1" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTable" xlink:label="us-gaap_ConcentrationRiskTable" xlink:title="us-gaap_ConcentrationRiskTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ConcentrationRiskLineItems" xlink:to="us-gaap_ConcentrationRiskTable" xlink:title="Definition : us-gaap_ConcentrationRiskLineItems to us-gaap_ConcentrationRiskTable" xlink:type="arc" order="2" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis" xlink:label="srt_StatementGeographicalAxis" xlink:title="srt_StatementGeographicalAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ConcentrationRiskTable" xlink:to="srt_StatementGeographicalAxis" xlink:title="Definition : us-gaap_ConcentrationRiskTable to srt_StatementGeographicalAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain" xlink:title="srt_SegmentGeographicalDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_FI" xlink:label="country_FI" xlink:title="country_FI" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_FI" xlink:title="Definition : srt_SegmentGeographicalDomain to country_FI" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_NZ" xlink:label="country_NZ" xlink:title="country_NZ" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_NZ" xlink:title="Definition : srt_SegmentGeographicalDomain to country_NZ" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_NO" xlink:label="country_NO" xlink:title="country_NO" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_NO" xlink:title="Definition : srt_SegmentGeographicalDomain to country_NO" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CA" xlink:label="country_CA" xlink:title="country_CA" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_CA" xlink:title="Definition : srt_SegmentGeographicalDomain to country_CA" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_OtherMember" xlink:label="rolr_OtherMember" xlink:title="rolr_OtherMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="rolr_OtherMember" xlink:title="Definition : srt_SegmentGeographicalDomain to rolr_OtherMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_TotalMember" xlink:label="rolr_TotalMember" xlink:title="rolr_TotalMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="rolr_TotalMember" xlink:title="Definition : srt_SegmentGeographicalDomain to rolr_TotalMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain_1" xlink:title="srt_SegmentGeographicalDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain_1" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="us-gaap_ConcentrationRiskByTypeAxis" xlink:title="us-gaap_ConcentrationRiskByTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ConcentrationRiskTable" xlink:to="us-gaap_ConcentrationRiskByTypeAxis" xlink:title="Definition : us-gaap_ConcentrationRiskTable to us-gaap_ConcentrationRiskByTypeAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="us-gaap_ConcentrationRiskTypeDomain" xlink:title="us-gaap_ConcentrationRiskTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ConcentrationRiskByTypeAxis" xlink:to="us-gaap_ConcentrationRiskTypeDomain" xlink:title="Definition : us-gaap_ConcentrationRiskByTypeAxis to us-gaap_ConcentrationRiskTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeographicConcentrationRiskMember" xlink:label="us-gaap_GeographicConcentrationRiskMember" xlink:title="us-gaap_GeographicConcentrationRiskMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ConcentrationRiskTypeDomain" xlink:to="us-gaap_GeographicConcentrationRiskMember" xlink:title="Definition : us-gaap_ConcentrationRiskTypeDomain to us-gaap_GeographicConcentrationRiskMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="us-gaap_ConcentrationRiskTypeDomain_1" xlink:title="us-gaap_ConcentrationRiskTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ConcentrationRiskByTypeAxis" xlink:to="us-gaap_ConcentrationRiskTypeDomain_1" xlink:title="Definition : us-gaap_ConcentrationRiskByTypeAxis to us-gaap_ConcentrationRiskTypeDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:title="us-gaap_ConcentrationRiskByBenchmarkAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ConcentrationRiskTable" xlink:to="us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:title="Definition : us-gaap_ConcentrationRiskTable to us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain" xlink:title="us-gaap_ConcentrationRiskBenchmarkDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:to="us-gaap_ConcentrationRiskBenchmarkDomain" xlink:title="Definition : us-gaap_ConcentrationRiskByBenchmarkAxis to us-gaap_ConcentrationRiskBenchmarkDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SalesRevenueNetMember" xlink:label="us-gaap_SalesRevenueNetMember" xlink:title="us-gaap_SalesRevenueNetMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ConcentrationRiskBenchmarkDomain" xlink:to="us-gaap_SalesRevenueNetMember" xlink:title="Definition : us-gaap_ConcentrationRiskBenchmarkDomain to us-gaap_SalesRevenueNetMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_1" xlink:title="us-gaap_ConcentrationRiskBenchmarkDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:to="us-gaap_ConcentrationRiskBenchmarkDomain_1" xlink:title="Definition : us-gaap_ConcentrationRiskByBenchmarkAxis to us-gaap_ConcentrationRiskBenchmarkDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis" xlink:label="srt_ProductOrServiceAxis" xlink:title="srt_ProductOrServiceAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ConcentrationRiskTable" xlink:to="srt_ProductOrServiceAxis" xlink:title="Definition : us-gaap_ConcentrationRiskTable to srt_ProductOrServiceAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain" xlink:label="srt_ProductsAndServicesDomain" xlink:title="srt_ProductsAndServicesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ProductOrServiceAxis" xlink:to="srt_ProductsAndServicesDomain" xlink:title="Definition : srt_ProductOrServiceAxis to srt_ProductsAndServicesDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_NetGamingRevenueMember" xlink:label="rolr_NetGamingRevenueMember" xlink:title="rolr_NetGamingRevenueMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ProductsAndServicesDomain" xlink:to="rolr_NetGamingRevenueMember" xlink:title="Definition : srt_ProductsAndServicesDomain to rolr_NetGamingRevenueMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain" xlink:label="srt_ProductsAndServicesDomain_1" xlink:title="srt_ProductsAndServicesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_ProductOrServiceAxis" xlink:to="srt_ProductsAndServicesDomain_1" xlink:title="Definition : srt_ProductOrServiceAxis to srt_ProductsAndServicesDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSSUnaudited">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems" xlink:title="us-gaap_StatementLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:label="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:title="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="us-gaap_CostsAndExpensesAbstract" xlink:title="us-gaap_CostsAndExpensesAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_CostsAndExpensesAbstract" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_CostsAndExpensesAbstract" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DirectOperatingCosts" xlink:label="us-gaap_DirectOperatingCosts" xlink:title="us-gaap_DirectOperatingCosts" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CostsAndExpensesAbstract" xlink:to="us-gaap_DirectOperatingCosts" xlink:title="Definition : us-gaap_CostsAndExpensesAbstract to us-gaap_DirectOperatingCosts" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="us-gaap_GeneralAndAdministrativeExpense" xlink:title="us-gaap_GeneralAndAdministrativeExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CostsAndExpensesAbstract" xlink:to="us-gaap_GeneralAndAdministrativeExpense" xlink:title="Definition : us-gaap_CostsAndExpensesAbstract to us-gaap_GeneralAndAdministrativeExpense" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdvertisingExpense" xlink:label="us-gaap_AdvertisingExpense" xlink:title="us-gaap_AdvertisingExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CostsAndExpensesAbstract" xlink:to="us-gaap_AdvertisingExpense" xlink:title="Definition : us-gaap_CostsAndExpensesAbstract to us-gaap_AdvertisingExpense" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="us-gaap_ResearchAndDevelopmentExpense" xlink:title="us-gaap_ResearchAndDevelopmentExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CostsAndExpensesAbstract" xlink:to="us-gaap_ResearchAndDevelopmentExpense" xlink:title="Definition : us-gaap_CostsAndExpensesAbstract to us-gaap_ResearchAndDevelopmentExpense" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpenses" xlink:label="us-gaap_CostsAndExpenses" xlink:title="us-gaap_CostsAndExpenses" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CostsAndExpensesAbstract" xlink:to="us-gaap_CostsAndExpenses" xlink:title="Definition : us-gaap_CostsAndExpensesAbstract to us-gaap_CostsAndExpenses" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss" xlink:label="us-gaap_OperatingIncomeLoss" xlink:title="us-gaap_OperatingIncomeLoss" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_OperatingIncomeLoss" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_OperatingIncomeLoss" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract" xlink:title="us-gaap_NonoperatingIncomeExpenseAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_NonoperatingIncomeExpenseAbstract" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_NonoperatingIncomeExpenseAbstract" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating" xlink:label="us-gaap_InterestExpenseNonoperating" xlink:title="us-gaap_InterestExpenseNonoperating" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_NonoperatingIncomeExpenseAbstract" xlink:to="us-gaap_InterestExpenseNonoperating" xlink:title="Definition : us-gaap_NonoperatingIncomeExpenseAbstract to us-gaap_InterestExpenseNonoperating" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="us-gaap_OtherNonoperatingIncomeExpense" xlink:title="us-gaap_OtherNonoperatingIncomeExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_NonoperatingIncomeExpenseAbstract" xlink:to="us-gaap_OtherNonoperatingIncomeExpense" xlink:title="Definition : us-gaap_NonoperatingIncomeExpenseAbstract to us-gaap_OtherNonoperatingIncomeExpense" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="us-gaap_NonoperatingIncomeExpense" xlink:title="us-gaap_NonoperatingIncomeExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_NonoperatingIncomeExpenseAbstract" xlink:to="us-gaap_NonoperatingIncomeExpense" xlink:title="Definition : us-gaap_NonoperatingIncomeExpenseAbstract to us-gaap_NonoperatingIncomeExpense" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:title="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit" xlink:title="us-gaap_IncomeTaxExpenseBenefit" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_IncomeTaxExpenseBenefit" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_IncomeTaxExpenseBenefit" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="us-gaap_IncomeLossFromContinuingOperations" xlink:title="us-gaap_IncomeLossFromContinuingOperations" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_IncomeLossFromContinuingOperations" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_IncomeLossFromContinuingOperations" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:title="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss" xlink:title="us-gaap_NetIncomeLoss" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_NetIncomeLoss" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_NetIncomeLoss" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:title="us-gaap_ComprehensiveIncomeNetOfTaxAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:title="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:to="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:title="Definition : us-gaap_ComprehensiveIncomeNetOfTaxAbstract to us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax" xlink:title="us-gaap_ComprehensiveIncomeNetOfTax" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:to="us-gaap_ComprehensiveIncomeNetOfTax" xlink:title="Definition : us-gaap_ComprehensiveIncomeNetOfTaxAbstract to us-gaap_ComprehensiveIncomeNetOfTax" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="us-gaap_EarningsPerShareAbstract" xlink:title="us-gaap_EarningsPerShareAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_EarningsPerShareAbstract" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_EarningsPerShareAbstract" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasic" xlink:label="us-gaap_EarningsPerShareBasic" xlink:title="us-gaap_EarningsPerShareBasic" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EarningsPerShareAbstract" xlink:to="us-gaap_EarningsPerShareBasic" xlink:title="Definition : us-gaap_EarningsPerShareAbstract to us-gaap_EarningsPerShareBasic" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:title="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EarningsPerShareAbstract" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:title="Definition : us-gaap_EarningsPerShareAbstract to us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="us-gaap_EarningsPerShareDiluted" xlink:title="us-gaap_EarningsPerShareDiluted" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EarningsPerShareAbstract" xlink:to="us-gaap_EarningsPerShareDiluted" xlink:title="Definition : us-gaap_EarningsPerShareAbstract to us-gaap_EarningsPerShareDiluted" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:title="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EarningsPerShareAbstract" xlink:to="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:title="Definition : us-gaap_EarningsPerShareAbstract to us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable" xlink:title="us-gaap_StatementTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementTable" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_StatementTable" xlink:type="arc" order="11" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : us-gaap_StatementTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember" xlink:title="us-gaap_RelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_RelatedPartyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonrelatedPartyMember" xlink:label="us-gaap_NonrelatedPartyMember" xlink:title="us-gaap_NonrelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_NonrelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_NonrelatedPartyMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/REVENUEComponentsofDisaggregatedRevenueDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="us-gaap_DisaggregationOfRevenueLineItems" xlink:title="us-gaap_DisaggregationOfRevenueLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues" xlink:label="us-gaap_Revenues" xlink:title="us-gaap_Revenues" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DisaggregationOfRevenueLineItems" xlink:to="us-gaap_Revenues" xlink:title="Definition : us-gaap_DisaggregationOfRevenueLineItems to us-gaap_Revenues" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="us-gaap_DisaggregationOfRevenueTable" xlink:title="us-gaap_DisaggregationOfRevenueTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DisaggregationOfRevenueLineItems" xlink:to="us-gaap_DisaggregationOfRevenueTable" xlink:title="Definition : us-gaap_DisaggregationOfRevenueLineItems to us-gaap_DisaggregationOfRevenueTable" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis" xlink:label="srt_ProductOrServiceAxis" xlink:title="srt_ProductOrServiceAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DisaggregationOfRevenueTable" xlink:to="srt_ProductOrServiceAxis" xlink:title="Definition : us-gaap_DisaggregationOfRevenueTable to srt_ProductOrServiceAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain" xlink:label="srt_ProductsAndServicesDomain" xlink:title="srt_ProductsAndServicesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ProductOrServiceAxis" xlink:to="srt_ProductsAndServicesDomain" xlink:title="Definition : srt_ProductOrServiceAxis to srt_ProductsAndServicesDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_NetGamingRevenueMember" xlink:label="rolr_NetGamingRevenueMember" xlink:title="rolr_NetGamingRevenueMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ProductsAndServicesDomain" xlink:to="rolr_NetGamingRevenueMember" xlink:title="Definition : srt_ProductsAndServicesDomain to rolr_NetGamingRevenueMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_NetRevenueNoncoreServicesMember" xlink:label="rolr_NetRevenueNoncoreServicesMember" xlink:title="rolr_NetRevenueNoncoreServicesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ProductsAndServicesDomain" xlink:to="rolr_NetRevenueNoncoreServicesMember" xlink:title="Definition : srt_ProductsAndServicesDomain to rolr_NetRevenueNoncoreServicesMember" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_NetIntragroupServicesArrangementsRevenueMember" xlink:label="rolr_NetIntragroupServicesArrangementsRevenueMember" xlink:title="rolr_NetIntragroupServicesArrangementsRevenueMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ProductsAndServicesDomain" xlink:to="rolr_NetIntragroupServicesArrangementsRevenueMember" xlink:title="Definition : srt_ProductsAndServicesDomain to rolr_NetIntragroupServicesArrangementsRevenueMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain" xlink:label="srt_ProductsAndServicesDomain_1" xlink:title="srt_ProductsAndServicesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_ProductOrServiceAxis" xlink:to="srt_ProductsAndServicesDomain_1" xlink:title="Definition : srt_ProductOrServiceAxis to srt_ProductsAndServicesDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="us-gaap_DisposalGroupClassificationAxis" xlink:title="us-gaap_DisposalGroupClassificationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DisaggregationOfRevenueTable" xlink:to="us-gaap_DisposalGroupClassificationAxis" xlink:title="Definition : us-gaap_DisaggregationOfRevenueTable to us-gaap_DisposalGroupClassificationAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="us-gaap_DisposalGroupClassificationDomain" xlink:title="us-gaap_DisposalGroupClassificationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DisposalGroupClassificationAxis" xlink:to="us-gaap_DisposalGroupClassificationDomain" xlink:title="Definition : us-gaap_DisposalGroupClassificationAxis to us-gaap_DisposalGroupClassificationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDiscontinuedOperationsMember" xlink:label="us-gaap_SegmentDiscontinuedOperationsMember" xlink:title="us-gaap_SegmentDiscontinuedOperationsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DisposalGroupClassificationDomain" xlink:to="us-gaap_SegmentDiscontinuedOperationsMember" xlink:title="Definition : us-gaap_DisposalGroupClassificationDomain to us-gaap_SegmentDiscontinuedOperationsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="us-gaap_DisposalGroupClassificationDomain_1" xlink:title="us-gaap_DisposalGroupClassificationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_DisposalGroupClassificationAxis" xlink:to="us-gaap_DisposalGroupClassificationDomain_1" xlink:title="Definition : us-gaap_DisposalGroupClassificationAxis to us-gaap_DisposalGroupClassificationDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESDetailsTextual">
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_SummaryOfSignificantAccountingPolicesLineItems" xlink:label="rolr_SummaryOfSignificantAccountingPolicesLineItems" xlink:title="rolr_SummaryOfSignificantAccountingPolicesLineItems" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_WorkingCapitalDeficit" xlink:label="rolr_WorkingCapitalDeficit" xlink:title="rolr_WorkingCapitalDeficit" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_SummaryOfSignificantAccountingPolicesLineItems" xlink:to="rolr_WorkingCapitalDeficit" xlink:title="Definition : rolr_SummaryOfSignificantAccountingPolicesLineItems to rolr_WorkingCapitalDeficit" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="us-gaap_ConcentrationRiskPercentage1" xlink:title="us-gaap_ConcentrationRiskPercentage1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_SummaryOfSignificantAccountingPolicesLineItems" xlink:to="us-gaap_ConcentrationRiskPercentage1" xlink:title="Definition : rolr_SummaryOfSignificantAccountingPolicesLineItems to us-gaap_ConcentrationRiskPercentage1" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossAfterTax" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossAfterTax" xlink:title="us-gaap_ForeignCurrencyTransactionGainLossAfterTax" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_SummaryOfSignificantAccountingPolicesLineItems" xlink:to="us-gaap_ForeignCurrencyTransactionGainLossAfterTax" xlink:title="Definition : rolr_SummaryOfSignificantAccountingPolicesLineItems to us-gaap_ForeignCurrencyTransactionGainLossAfterTax" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PriorPeriodReclassificationAdjustment" xlink:label="us-gaap_PriorPeriodReclassificationAdjustment" xlink:title="us-gaap_PriorPeriodReclassificationAdjustment" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_SummaryOfSignificantAccountingPolicesLineItems" xlink:to="us-gaap_PriorPeriodReclassificationAdjustment" xlink:title="Definition : rolr_SummaryOfSignificantAccountingPolicesLineItems to us-gaap_PriorPeriodReclassificationAdjustment" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_SummaryOfSignificantAccountingPolicesTable" xlink:label="rolr_SummaryOfSignificantAccountingPolicesTable" xlink:title="rolr_SummaryOfSignificantAccountingPolicesTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="rolr_SummaryOfSignificantAccountingPolicesLineItems" xlink:to="rolr_SummaryOfSignificantAccountingPolicesTable" xlink:title="Definition : rolr_SummaryOfSignificantAccountingPolicesLineItems to rolr_SummaryOfSignificantAccountingPolicesTable" xlink:type="arc" order="4" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:title="us-gaap_ConcentrationRiskByBenchmarkAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="rolr_SummaryOfSignificantAccountingPolicesTable" xlink:to="us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:title="Definition : rolr_SummaryOfSignificantAccountingPolicesTable to us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain" xlink:title="us-gaap_ConcentrationRiskBenchmarkDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:to="us-gaap_ConcentrationRiskBenchmarkDomain" xlink:title="Definition : us-gaap_ConcentrationRiskByBenchmarkAxis to us-gaap_ConcentrationRiskBenchmarkDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsMember" xlink:label="us-gaap_CashAndCashEquivalentsMember" xlink:title="us-gaap_CashAndCashEquivalentsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ConcentrationRiskBenchmarkDomain" xlink:to="us-gaap_CashAndCashEquivalentsMember" xlink:title="Definition : us-gaap_ConcentrationRiskBenchmarkDomain to us-gaap_CashAndCashEquivalentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_1" xlink:title="us-gaap_ConcentrationRiskBenchmarkDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:to="us-gaap_ConcentrationRiskBenchmarkDomain_1" xlink:title="Definition : us-gaap_ConcentrationRiskByBenchmarkAxis to us-gaap_ConcentrationRiskBenchmarkDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="us-gaap_ConcentrationRiskByTypeAxis" xlink:title="us-gaap_ConcentrationRiskByTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="rolr_SummaryOfSignificantAccountingPolicesTable" xlink:to="us-gaap_ConcentrationRiskByTypeAxis" xlink:title="Definition : rolr_SummaryOfSignificantAccountingPolicesTable to us-gaap_ConcentrationRiskByTypeAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="us-gaap_ConcentrationRiskTypeDomain" xlink:title="us-gaap_ConcentrationRiskTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ConcentrationRiskByTypeAxis" xlink:to="us-gaap_ConcentrationRiskTypeDomain" xlink:title="Definition : us-gaap_ConcentrationRiskByTypeAxis to us-gaap_ConcentrationRiskTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeographicConcentrationRiskMember" xlink:label="us-gaap_GeographicConcentrationRiskMember" xlink:title="us-gaap_GeographicConcentrationRiskMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ConcentrationRiskTypeDomain" xlink:to="us-gaap_GeographicConcentrationRiskMember" xlink:title="Definition : us-gaap_ConcentrationRiskTypeDomain to us-gaap_GeographicConcentrationRiskMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="us-gaap_ConcentrationRiskTypeDomain_1" xlink:title="us-gaap_ConcentrationRiskTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ConcentrationRiskByTypeAxis" xlink:to="us-gaap_ConcentrationRiskTypeDomain_1" xlink:title="Definition : us-gaap_ConcentrationRiskByTypeAxis to us-gaap_ConcentrationRiskTypeDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis" xlink:label="srt_StatementGeographicalAxis" xlink:title="srt_StatementGeographicalAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="rolr_SummaryOfSignificantAccountingPolicesTable" xlink:to="srt_StatementGeographicalAxis" xlink:title="Definition : rolr_SummaryOfSignificantAccountingPolicesTable to srt_StatementGeographicalAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain" xlink:title="srt_SegmentGeographicalDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonUsMember" xlink:label="us-gaap_NonUsMember" xlink:title="us-gaap_NonUsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="us-gaap_NonUsMember" xlink:title="Definition : srt_SegmentGeographicalDomain to us-gaap_NonUsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain_1" xlink:title="srt_SegmentGeographicalDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain_1" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="rolr_SummaryOfSignificantAccountingPolicesTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : rolr_SummaryOfSignificantAccountingPolicesTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember" xlink:title="us-gaap_RelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_RelatedPartyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SHAREBASEDCOMPENSATIONOptionsAwardAssumptionsDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:title="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="arc" order="8" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis" xlink:title="us-gaap_AwardTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_AwardTypeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_AwardTypeAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="us-gaap_EmployeeStockOptionMember" xlink:title="us-gaap_EmployeeStockOptionMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_EmployeeStockOptionMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_EmployeeStockOptionMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis" xlink:title="srt_RangeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="srt_RangeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to srt_RangeAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember" xlink:title="srt_MinimumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MinimumMember" xlink:title="Definition : srt_RangeMember to srt_MinimumMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember" xlink:title="srt_MaximumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MaximumMember" xlink:title="Definition : srt_RangeMember to srt_MaximumMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember_1" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember_1" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITYUnaudited">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems" xlink:title="us-gaap_StatementLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:title="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:title="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:title="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:title="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueIssuedForServices" xlink:label="us-gaap_StockIssuedDuringPeriodValueIssuedForServices" xlink:title="us-gaap_StockIssuedDuringPeriodValueIssuedForServices" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodValueIssuedForServices" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_StockIssuedDuringPeriodValueIssuedForServices" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:title="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:title="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_StockIssuedDuringPeriodSharesPrivatePlacementAndRegisteredDirectOfferings" xlink:label="rolr_StockIssuedDuringPeriodSharesPrivatePlacementAndRegisteredDirectOfferings" xlink:title="rolr_StockIssuedDuringPeriodSharesPrivatePlacementAndRegisteredDirectOfferings" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="rolr_StockIssuedDuringPeriodSharesPrivatePlacementAndRegisteredDirectOfferings" xlink:title="Definition : us-gaap_StatementLineItems to rolr_StockIssuedDuringPeriodSharesPrivatePlacementAndRegisteredDirectOfferings" xlink:type="arc" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_StockIssuedDuringPeriodValuePrivatePlacementAndRegisteredDirectOfferings" xlink:label="rolr_StockIssuedDuringPeriodValuePrivatePlacementAndRegisteredDirectOfferings" xlink:title="rolr_StockIssuedDuringPeriodValuePrivatePlacementAndRegisteredDirectOfferings" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="rolr_StockIssuedDuringPeriodValuePrivatePlacementAndRegisteredDirectOfferings" xlink:title="Definition : us-gaap_StatementLineItems to rolr_StockIssuedDuringPeriodValuePrivatePlacementAndRegisteredDirectOfferings" xlink:type="arc" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss" xlink:title="us-gaap_NetIncomeLoss" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_NetIncomeLoss" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_NetIncomeLoss" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:title="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesOutstanding" xlink:label="us-gaap_SharesOutstanding" xlink:title="us-gaap_SharesOutstanding" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_SharesOutstanding" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_SharesOutstanding" xlink:type="arc" use="optional" order="11" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity" xlink:title="us-gaap_StockholdersEquity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StockholdersEquity" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_StockholdersEquity" xlink:type="arc" use="optional" order="12" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable" xlink:title="us-gaap_StatementTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementTable" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_StatementTable" xlink:type="arc" order="13" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis" xlink:title="us-gaap_StatementEquityComponentsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementEquityComponentsAxis" xlink:title="Definition : us-gaap_StatementTable to us-gaap_StatementEquityComponentsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember" xlink:title="us-gaap_CommonStockMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_CommonStockMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_CommonStockMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="us-gaap_AdditionalPaidInCapitalMember" xlink:title="us-gaap_AdditionalPaidInCapitalMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_AdditionalPaidInCapitalMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_AdditionalPaidInCapitalMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember" xlink:label="us-gaap_RetainedEarningsMember" xlink:title="us-gaap_RetainedEarningsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_RetainedEarningsMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_RetainedEarningsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:title="us-gaap_AccumulatedOtherComprehensiveIncomeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain_1" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain_1" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/DISCONTINUEDOPERATIONSDetailsNarrative">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:title="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:label="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:title="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:to="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems to us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" xlink:label="us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" xlink:title="us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:to="us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems to us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:title="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:to="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems to us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss" xlink:title="us-gaap_NetIncomeLoss" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:to="us-gaap_NetIncomeLoss" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems to us-gaap_NetIncomeLoss" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation" xlink:label="us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation" xlink:title="us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:to="us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems to us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation" xlink:label="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation" xlink:title="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:to="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems to us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:title="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:to="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems to us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:type="arc" order="6" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="us-gaap_DisposalGroupClassificationAxis" xlink:title="us-gaap_DisposalGroupClassificationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:to="us-gaap_DisposalGroupClassificationAxis" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable to us-gaap_DisposalGroupClassificationAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="us-gaap_DisposalGroupClassificationDomain" xlink:title="us-gaap_DisposalGroupClassificationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DisposalGroupClassificationAxis" xlink:to="us-gaap_DisposalGroupClassificationDomain" xlink:title="Definition : us-gaap_DisposalGroupClassificationAxis to us-gaap_DisposalGroupClassificationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDiscontinuedOperationsMember" xlink:label="us-gaap_SegmentDiscontinuedOperationsMember" xlink:title="us-gaap_SegmentDiscontinuedOperationsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DisposalGroupClassificationDomain" xlink:to="us-gaap_SegmentDiscontinuedOperationsMember" xlink:title="Definition : us-gaap_DisposalGroupClassificationDomain to us-gaap_SegmentDiscontinuedOperationsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="us-gaap_DisposalGroupClassificationDomain_1" xlink:title="us-gaap_DisposalGroupClassificationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_DisposalGroupClassificationAxis" xlink:to="us-gaap_DisposalGroupClassificationDomain_1" xlink:title="Definition : us-gaap_DisposalGroupClassificationAxis to us-gaap_DisposalGroupClassificationDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:title="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:to="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable to us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:title="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:to="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis to us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_CasinoRoomDomainBusinessMember" xlink:label="rolr_CasinoRoomDomainBusinessMember" xlink:title="rolr_CasinoRoomDomainBusinessMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:to="rolr_CasinoRoomDomainBusinessMember" xlink:title="Definition : us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain to rolr_CasinoRoomDomainBusinessMember" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_1" xlink:title="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:to="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_1" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis to us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="us-gaap_BusinessAcquisitionAxis" xlink:title="us-gaap_BusinessAcquisitionAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:to="us-gaap_BusinessAcquisitionAxis" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable to us-gaap_BusinessAcquisitionAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain" xlink:title="us-gaap_BusinessAcquisitionAcquireeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_BusinessAcquisitionAxis" xlink:to="us-gaap_BusinessAcquisitionAcquireeDomain" xlink:title="Definition : us-gaap_BusinessAcquisitionAxis to us-gaap_BusinessAcquisitionAcquireeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_HappyHourSolutionsLimitedMember" xlink:label="rolr_HappyHourSolutionsLimitedMember" xlink:title="rolr_HappyHourSolutionsLimitedMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_BusinessAcquisitionAcquireeDomain" xlink:to="rolr_HappyHourSolutionsLimitedMember" xlink:title="Definition : us-gaap_BusinessAcquisitionAcquireeDomain to rolr_HappyHourSolutionsLimitedMember" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_1" xlink:title="us-gaap_BusinessAcquisitionAcquireeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_BusinessAcquisitionAxis" xlink:to="us-gaap_BusinessAcquisitionAcquireeDomain_1" xlink:title="Definition : us-gaap_BusinessAcquisitionAxis to us-gaap_BusinessAcquisitionAcquireeDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/DISCONTINUEDOPERATIONSScheduleofnetincomelossfromdiscontinuedoperationsDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:title="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract" xlink:label="us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract" xlink:title="us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:to="us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems to us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" xlink:title="us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract" xlink:to="us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" xlink:title="Definition : us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract to us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" xlink:label="rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" xlink:title="rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract" xlink:to="rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" xlink:title="Definition : us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract to rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold" xlink:title="us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" xlink:to="us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold" xlink:title="Definition : rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract to us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense" xlink:title="us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" xlink:to="us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense" xlink:title="Definition : rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract to us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_DisposalGroupIncludingDiscontinuedOperationAdvertisingAndPromotionsExpense" xlink:label="rolr_DisposalGroupIncludingDiscontinuedOperationAdvertisingAndPromotionsExpense" xlink:title="rolr_DisposalGroupIncludingDiscontinuedOperationAdvertisingAndPromotionsExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" xlink:to="rolr_DisposalGroupIncludingDiscontinuedOperationAdvertisingAndPromotionsExpense" xlink:title="Definition : rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract to rolr_DisposalGroupIncludingDiscontinuedOperationAdvertisingAndPromotionsExpense" xlink:type="arc" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense" xlink:title="us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" xlink:to="us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense" xlink:title="Definition : rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract to us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss" xlink:title="us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" xlink:to="us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss" xlink:title="Definition : rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract to us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense" xlink:title="us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" xlink:to="us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense" xlink:title="Definition : rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract to us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_DisposalGroupIncludingDiscontinuedOperationGainLossOnDispositionOfAssetsBeforeTax" xlink:label="rolr_DisposalGroupIncludingDiscontinuedOperationGainLossOnDispositionOfAssetsBeforeTax" xlink:title="rolr_DisposalGroupIncludingDiscontinuedOperationGainLossOnDispositionOfAssetsBeforeTax" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" xlink:to="rolr_DisposalGroupIncludingDiscontinuedOperationGainLossOnDispositionOfAssetsBeforeTax" xlink:title="Definition : rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract to rolr_DisposalGroupIncludingDiscontinuedOperationGainLossOnDispositionOfAssetsBeforeTax" xlink:type="arc" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_DisposalGroupIncludingDiscontinuedOperationReclassificationOfAccumulatedOtherComprehensiveIncome" xlink:label="rolr_DisposalGroupIncludingDiscontinuedOperationReclassificationOfAccumulatedOtherComprehensiveIncome" xlink:title="rolr_DisposalGroupIncludingDiscontinuedOperationReclassificationOfAccumulatedOtherComprehensiveIncome" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" xlink:to="rolr_DisposalGroupIncludingDiscontinuedOperationReclassificationOfAccumulatedOtherComprehensiveIncome" xlink:title="Definition : rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract to rolr_DisposalGroupIncludingDiscontinuedOperationReclassificationOfAccumulatedOtherComprehensiveIncome" xlink:type="arc" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax" xlink:label="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax" xlink:title="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" xlink:to="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax" xlink:title="Definition : rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract to us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation" xlink:label="us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation" xlink:title="us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" xlink:to="us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation" xlink:title="Definition : rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract to us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:title="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract" xlink:to="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:title="Definition : rolr_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseAbstract to us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:title="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:to="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems to us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="us-gaap_DisposalGroupClassificationAxis" xlink:title="us-gaap_DisposalGroupClassificationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:to="us-gaap_DisposalGroupClassificationAxis" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable to us-gaap_DisposalGroupClassificationAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="us-gaap_DisposalGroupClassificationDomain" xlink:title="us-gaap_DisposalGroupClassificationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DisposalGroupClassificationAxis" xlink:to="us-gaap_DisposalGroupClassificationDomain" xlink:title="Definition : us-gaap_DisposalGroupClassificationAxis to us-gaap_DisposalGroupClassificationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDiscontinuedOperationsMember" xlink:label="us-gaap_SegmentDiscontinuedOperationsMember" xlink:title="us-gaap_SegmentDiscontinuedOperationsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DisposalGroupClassificationDomain" xlink:to="us-gaap_SegmentDiscontinuedOperationsMember" xlink:title="Definition : us-gaap_DisposalGroupClassificationDomain to us-gaap_SegmentDiscontinuedOperationsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="us-gaap_DisposalGroupClassificationDomain_1" xlink:title="us-gaap_DisposalGroupClassificationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_DisposalGroupClassificationAxis" xlink:to="us-gaap_DisposalGroupClassificationDomain_1" xlink:title="Definition : us-gaap_DisposalGroupClassificationAxis to us-gaap_DisposalGroupClassificationDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:title="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:to="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable to us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:title="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:to="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis to us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_CasinoRoomDomainBusinessMember" xlink:label="rolr_CasinoRoomDomainBusinessMember" xlink:title="rolr_CasinoRoomDomainBusinessMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:to="rolr_CasinoRoomDomainBusinessMember" xlink:title="Definition : us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain to rolr_CasinoRoomDomainBusinessMember" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_1" xlink:title="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:to="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_1" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis to us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember" xlink:title="us-gaap_RelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_RelatedPartyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/RELATEDPARTYTRANSACTIONSDetailsTextual">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems" xlink:title="us-gaap_RelatedPartyTransactionLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DirectOperatingCosts" xlink:label="us-gaap_DirectOperatingCosts" xlink:title="us-gaap_DirectOperatingCosts" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_DirectOperatingCosts" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_DirectOperatingCosts" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues" xlink:label="us-gaap_Revenues" xlink:title="us-gaap_Revenues" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_Revenues" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_Revenues" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MarketingAndAdvertisingExpense" xlink:label="us-gaap_MarketingAndAdvertisingExpense" xlink:title="us-gaap_MarketingAndAdvertisingExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_MarketingAndAdvertisingExpense" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_MarketingAndAdvertisingExpense" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="us-gaap_GeneralAndAdministrativeExpense" xlink:title="us-gaap_GeneralAndAdministrativeExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_GeneralAndAdministrativeExpense" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_GeneralAndAdministrativeExpense" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_ConsiderationPaidPerMonth" xlink:label="rolr_ConsiderationPaidPerMonth" xlink:title="rolr_ConsiderationPaidPerMonth" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="rolr_ConsiderationPaidPerMonth" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to rolr_ConsiderationPaidPerMonth" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpenses" xlink:label="us-gaap_OperatingExpenses" xlink:title="us-gaap_OperatingExpenses" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_OperatingExpenses" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_OperatingExpenses" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost" xlink:label="us-gaap_ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost" xlink:title="us-gaap_ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrentAndNoncurrent" xlink:label="us-gaap_AccountsPayableCurrentAndNoncurrent" xlink:title="us-gaap_AccountsPayableCurrentAndNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_AccountsPayableCurrentAndNoncurrent" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_AccountsPayableCurrentAndNoncurrent" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnsecuredDebt" xlink:label="us-gaap_UnsecuredDebt" xlink:title="us-gaap_UnsecuredDebt" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_UnsecuredDebt" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_UnsecuredDebt" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:title="us-gaap_DebtInstrumentInterestRateStatedPercentage" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfUnsecuredDebt" xlink:label="us-gaap_RepaymentsOfUnsecuredDebt" xlink:title="us-gaap_RepaymentsOfUnsecuredDebt" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RepaymentsOfUnsecuredDebt" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_RepaymentsOfUnsecuredDebt" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtConversionOriginalDebtAmount1" xlink:label="us-gaap_DebtConversionOriginalDebtAmount1" xlink:title="us-gaap_DebtConversionOriginalDebtAmount1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_DebtConversionOriginalDebtAmount1" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_DebtConversionOriginalDebtAmount1" xlink:type="arc" use="optional" order="11" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpenses" xlink:label="us-gaap_CostsAndExpenses" xlink:title="us-gaap_CostsAndExpenses" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_CostsAndExpenses" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_CostsAndExpenses" xlink:type="arc" use="optional" order="12" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="us-gaap_ResearchAndDevelopmentExpense" xlink:title="us-gaap_ResearchAndDevelopmentExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ResearchAndDevelopmentExpense" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_ResearchAndDevelopmentExpense" xlink:type="arc" use="optional" order="13" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" xlink:title="us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" xlink:type="arc" use="optional" order="14" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold" xlink:title="us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold" xlink:type="arc" use="optional" order="15" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:title="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="arc" order="16" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_InteractiveAndSpikeUpMember" xlink:label="rolr_InteractiveAndSpikeUpMember" xlink:title="rolr_InteractiveAndSpikeUpMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="rolr_InteractiveAndSpikeUpMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to rolr_InteractiveAndSpikeUpMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_SpikeUpMember" xlink:label="rolr_SpikeUpMember" xlink:title="rolr_SpikeUpMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="rolr_SpikeUpMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to rolr_SpikeUpMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_HappyHourSolutionsMember" xlink:label="rolr_HappyHourSolutionsMember" xlink:title="rolr_HappyHourSolutionsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="rolr_HappyHourSolutionsMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to rolr_HappyHourSolutionsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_HappyHourEntertainmentHoldingsMember" xlink:label="rolr_HappyHourEntertainmentHoldingsMember" xlink:title="rolr_HappyHourEntertainmentHoldingsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="rolr_HappyHourEntertainmentHoldingsMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to rolr_HappyHourEntertainmentHoldingsMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="us-gaap_RelatedPartyTransactionAxis" xlink:title="us-gaap_RelatedPartyTransactionAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to us-gaap_RelatedPartyTransactionAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="us-gaap_RelatedPartyTransactionDomain" xlink:title="us-gaap_RelatedPartyTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionAxis to us-gaap_RelatedPartyTransactionDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_MonthlyPaymentForRevenueAgreementMember" xlink:label="rolr_MonthlyPaymentForRevenueAgreementMember" xlink:title="rolr_MonthlyPaymentForRevenueAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="rolr_MonthlyPaymentForRevenueAgreementMember" xlink:title="Definition : us-gaap_RelatedPartyTransactionDomain to rolr_MonthlyPaymentForRevenueAgreementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="us-gaap_RelatedPartyTransactionDomain_1" xlink:title="us-gaap_RelatedPartyTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionAxis to us-gaap_RelatedPartyTransactionDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:title="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:title="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:title="Definition : us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis to us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_HighrollercomDomainMember" xlink:label="rolr_HighrollercomDomainMember" xlink:title="rolr_HighrollercomDomainMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="rolr_HighrollercomDomainMember" xlink:title="Definition : us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain to rolr_HighrollercomDomainMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_1" xlink:title="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_1" xlink:title="Definition : us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis to us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtConversionByUniqueDescriptionAxis" xlink:label="us-gaap_DebtConversionByUniqueDescriptionAxis" xlink:title="us-gaap_DebtConversionByUniqueDescriptionAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_DebtConversionByUniqueDescriptionAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to us-gaap_DebtConversionByUniqueDescriptionAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtConversionNameDomain" xlink:label="us-gaap_DebtConversionNameDomain" xlink:title="us-gaap_DebtConversionNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DebtConversionByUniqueDescriptionAxis" xlink:to="us-gaap_DebtConversionNameDomain" xlink:title="Definition : us-gaap_DebtConversionByUniqueDescriptionAxis to us-gaap_DebtConversionNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_ConversionOfRelatedPartyDebtIntoCommonStockMember" xlink:label="rolr_ConversionOfRelatedPartyDebtIntoCommonStockMember" xlink:title="rolr_ConversionOfRelatedPartyDebtIntoCommonStockMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtConversionNameDomain" xlink:to="rolr_ConversionOfRelatedPartyDebtIntoCommonStockMember" xlink:title="Definition : us-gaap_DebtConversionNameDomain to rolr_ConversionOfRelatedPartyDebtIntoCommonStockMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtConversionNameDomain" xlink:label="us-gaap_DebtConversionNameDomain_1" xlink:title="us-gaap_DebtConversionNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_DebtConversionByUniqueDescriptionAxis" xlink:to="us-gaap_DebtConversionNameDomain_1" xlink:title="Definition : us-gaap_DebtConversionByUniqueDescriptionAxis to us-gaap_DebtConversionNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="us-gaap_DisposalGroupClassificationAxis" xlink:title="us-gaap_DisposalGroupClassificationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_DisposalGroupClassificationAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to us-gaap_DisposalGroupClassificationAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="us-gaap_DisposalGroupClassificationDomain" xlink:title="us-gaap_DisposalGroupClassificationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DisposalGroupClassificationAxis" xlink:to="us-gaap_DisposalGroupClassificationDomain" xlink:title="Definition : us-gaap_DisposalGroupClassificationAxis to us-gaap_DisposalGroupClassificationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDiscontinuedOperationsMember" xlink:label="us-gaap_SegmentDiscontinuedOperationsMember" xlink:title="us-gaap_SegmentDiscontinuedOperationsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DisposalGroupClassificationDomain" xlink:to="us-gaap_SegmentDiscontinuedOperationsMember" xlink:title="Definition : us-gaap_DisposalGroupClassificationDomain to us-gaap_SegmentDiscontinuedOperationsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="us-gaap_DisposalGroupClassificationDomain_1" xlink:title="us-gaap_DisposalGroupClassificationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_DisposalGroupClassificationAxis" xlink:to="us-gaap_DisposalGroupClassificationDomain_1" xlink:title="Definition : us-gaap_DisposalGroupClassificationAxis to us-gaap_DisposalGroupClassificationDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:title="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:title="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:to="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis to us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_CasinoRoomDomainBusinessMember" xlink:label="rolr_CasinoRoomDomainBusinessMember" xlink:title="rolr_CasinoRoomDomainBusinessMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:to="rolr_CasinoRoomDomainBusinessMember" xlink:title="Definition : us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain to rolr_CasinoRoomDomainBusinessMember" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_1" xlink:title="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:to="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_1" xlink:title="Definition : us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis to us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSUnaudited">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems" xlink:title="us-gaap_StatementLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract" xlink:title="us-gaap_AssetsAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_AssetsAbstract" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_AssetsAbstract" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="us-gaap_AssetsCurrentAbstract" xlink:title="us-gaap_AssetsCurrentAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsCurrentAbstract" xlink:title="Definition : us-gaap_AssetsAbstract to us-gaap_AssetsCurrentAbstract" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:title="us-gaap_CashAndCashEquivalentsAtCarryingValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:title="Definition : us-gaap_AssetsCurrentAbstract to us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashCurrent" xlink:label="us-gaap_RestrictedCashCurrent" xlink:title="us-gaap_RestrictedCashCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_RestrictedCashCurrent" xlink:title="Definition : us-gaap_AssetsCurrentAbstract to us-gaap_RestrictedCashCurrent" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:title="us-gaap_PrepaidExpenseAndOtherAssetsCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:title="Definition : us-gaap_AssetsCurrentAbstract to us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_DeferredIncomeTaxAssetsNetCurrent" xlink:label="rolr_DeferredIncomeTaxAssetsNetCurrent" xlink:title="rolr_DeferredIncomeTaxAssetsNetCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="rolr_DeferredIncomeTaxAssetsNetCurrent" xlink:title="Definition : us-gaap_AssetsCurrentAbstract to rolr_DeferredIncomeTaxAssetsNetCurrent" xlink:type="arc" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent" xlink:label="us-gaap_AssetsCurrent" xlink:title="us-gaap_AssetsCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AssetsCurrent" xlink:title="Definition : us-gaap_AssetsCurrentAbstract to us-gaap_AssetsCurrent" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCosts" xlink:label="us-gaap_DeferredCosts" xlink:title="us-gaap_DeferredCosts" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_DeferredCosts" xlink:title="Definition : us-gaap_AssetsAbstract to us-gaap_DeferredCosts" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet" xlink:title="us-gaap_PropertyPlantAndEquipmentNet" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_PropertyPlantAndEquipmentNet" xlink:title="Definition : us-gaap_AssetsAbstract to us-gaap_PropertyPlantAndEquipmentNet" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset" xlink:title="us-gaap_OperatingLeaseRightOfUseAsset" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset" xlink:title="Definition : us-gaap_AssetsAbstract to us-gaap_OperatingLeaseRightOfUseAsset" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:title="us-gaap_IntangibleAssetsNetExcludingGoodwill" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:title="Definition : us-gaap_AssetsAbstract to us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxAssetsNet" xlink:label="us-gaap_DeferredIncomeTaxAssetsNet" xlink:title="us-gaap_DeferredIncomeTaxAssetsNet" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_DeferredIncomeTaxAssetsNet" xlink:title="Definition : us-gaap_AssetsAbstract to us-gaap_DeferredIncomeTaxAssetsNet" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="us-gaap_OtherAssetsNoncurrent" xlink:title="us-gaap_OtherAssetsNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_OtherAssetsNoncurrent" xlink:title="Definition : us-gaap_AssetsAbstract to us-gaap_OtherAssetsNoncurrent" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets" xlink:title="us-gaap_Assets" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_Assets" xlink:title="Definition : us-gaap_AssetsAbstract to us-gaap_Assets" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:title="us-gaap_LiabilitiesAndStockholdersEquityAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="us-gaap_LiabilitiesCurrentAbstract" xlink:title="us-gaap_LiabilitiesCurrentAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesCurrentAbstract" xlink:title="Definition : us-gaap_LiabilitiesAndStockholdersEquityAbstract to us-gaap_LiabilitiesCurrentAbstract" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent" xlink:label="us-gaap_AccountsPayableCurrent" xlink:title="us-gaap_AccountsPayableCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_AccountsPayableCurrent" xlink:title="Definition : us-gaap_LiabilitiesCurrentAbstract to us-gaap_AccountsPayableCurrent" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="us-gaap_AccruedLiabilitiesCurrent" xlink:title="us-gaap_AccruedLiabilitiesCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_AccruedLiabilitiesCurrent" xlink:title="Definition : us-gaap_LiabilitiesCurrentAbstract to us-gaap_AccruedLiabilitiesCurrent" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_PlayerLiabilitiesCurrent" xlink:label="rolr_PlayerLiabilitiesCurrent" xlink:title="rolr_PlayerLiabilitiesCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="rolr_PlayerLiabilitiesCurrent" xlink:title="Definition : us-gaap_LiabilitiesCurrentAbstract to rolr_PlayerLiabilitiesCurrent" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent" xlink:title="us-gaap_OperatingLeaseLiabilityCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_OperatingLeaseLiabilityCurrent" xlink:title="Definition : us-gaap_LiabilitiesCurrentAbstract to us-gaap_OperatingLeaseLiabilityCurrent" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent" xlink:title="us-gaap_LiabilitiesCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LiabilitiesCurrent" xlink:title="Definition : us-gaap_LiabilitiesCurrentAbstract to us-gaap_LiabilitiesCurrent" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="us-gaap_OtherLiabilitiesNoncurrent" xlink:title="us-gaap_OtherLiabilitiesNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_OtherLiabilitiesNoncurrent" xlink:title="Definition : us-gaap_LiabilitiesAndStockholdersEquityAbstract to us-gaap_OtherLiabilitiesNoncurrent" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:title="us-gaap_OperatingLeaseLiabilityNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:title="Definition : us-gaap_LiabilitiesAndStockholdersEquityAbstract to us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities" xlink:title="us-gaap_Liabilities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_Liabilities" xlink:title="Definition : us-gaap_LiabilitiesAndStockholdersEquityAbstract to us-gaap_Liabilities" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityAbstract" xlink:label="us-gaap_EquityAbstract" xlink:title="us-gaap_EquityAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_EquityAbstract" xlink:title="Definition : us-gaap_LiabilitiesAndStockholdersEquityAbstract to us-gaap_EquityAbstract" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockValue" xlink:label="us-gaap_PreferredStockValue" xlink:title="us-gaap_PreferredStockValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_PreferredStockValue" xlink:title="Definition : us-gaap_EquityAbstract to us-gaap_PreferredStockValue" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue" xlink:title="us-gaap_CommonStockValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_CommonStockValue" xlink:title="Definition : us-gaap_EquityAbstract to us-gaap_CommonStockValue" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="us-gaap_AdditionalPaidInCapital" xlink:title="us-gaap_AdditionalPaidInCapital" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_AdditionalPaidInCapital" xlink:title="Definition : us-gaap_EquityAbstract to us-gaap_AdditionalPaidInCapital" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:title="us-gaap_RetainedEarningsAccumulatedDeficit" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:title="Definition : us-gaap_EquityAbstract to us-gaap_RetainedEarningsAccumulatedDeficit" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:title="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:title="Definition : us-gaap_EquityAbstract to us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity" xlink:title="us-gaap_StockholdersEquity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_StockholdersEquity" xlink:title="Definition : us-gaap_EquityAbstract to us-gaap_StockholdersEquity" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity" xlink:title="us-gaap_LiabilitiesAndStockholdersEquity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity" xlink:title="Definition : us-gaap_LiabilitiesAndStockholdersEquityAbstract to us-gaap_LiabilitiesAndStockholdersEquity" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable" xlink:title="us-gaap_StatementTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementTable" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_StatementTable" xlink:type="arc" order="2" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : us-gaap_StatementTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember" xlink:title="us-gaap_RelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_RelatedPartyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonrelatedPartyMember" xlink:label="us-gaap_NonrelatedPartyMember" xlink:title="us-gaap_NonrelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_NonrelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_NonrelatedPartyMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SUBSEQUENTEVENTSDetailsNarrative">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventLineItems" xlink:label="us-gaap_SubsequentEventLineItems" xlink:title="us-gaap_SubsequentEventLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:title="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:title="Definition : us-gaap_SubsequentEventLineItems to us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare" xlink:title="us-gaap_CommonStockParOrStatedValuePerShare" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare" xlink:title="Definition : us-gaap_SubsequentEventLineItems to us-gaap_CommonStockParOrStatedValuePerShare" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockPricePerShare" xlink:label="us-gaap_SaleOfStockPricePerShare" xlink:title="us-gaap_SaleOfStockPricePerShare" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_SaleOfStockPricePerShare" xlink:title="Definition : us-gaap_SubsequentEventLineItems to us-gaap_SaleOfStockPricePerShare" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:title="us-gaap_ProceedsFromIssuanceOfPrivatePlacement" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:title="Definition : us-gaap_SubsequentEventLineItems to us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_LockUpPeriodForSharesIssued" xlink:label="rolr_LockUpPeriodForSharesIssued" xlink:title="rolr_LockUpPeriodForSharesIssued" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="rolr_LockUpPeriodForSharesIssued" xlink:title="Definition : us-gaap_SubsequentEventLineItems to rolr_LockUpPeriodForSharesIssued" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_PercentageOfProceedsFromOfferingOfSharesIssuedForEstimationOfCashFeeToPlacementAgent" xlink:label="rolr_PercentageOfProceedsFromOfferingOfSharesIssuedForEstimationOfCashFeeToPlacementAgent" xlink:title="rolr_PercentageOfProceedsFromOfferingOfSharesIssuedForEstimationOfCashFeeToPlacementAgent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="rolr_PercentageOfProceedsFromOfferingOfSharesIssuedForEstimationOfCashFeeToPlacementAgent" xlink:title="Definition : us-gaap_SubsequentEventLineItems to rolr_PercentageOfProceedsFromOfferingOfSharesIssuedForEstimationOfCashFeeToPlacementAgent" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_PercentageOfProceedsFromOfferingOfSharesIssuedForEstimationOfNonAccountableExpenseAllowanceToPlacementAgent" xlink:label="rolr_PercentageOfProceedsFromOfferingOfSharesIssuedForEstimationOfNonAccountableExpenseAllowanceToPlacementAgent" xlink:title="rolr_PercentageOfProceedsFromOfferingOfSharesIssuedForEstimationOfNonAccountableExpenseAllowanceToPlacementAgent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="rolr_PercentageOfProceedsFromOfferingOfSharesIssuedForEstimationOfNonAccountableExpenseAllowanceToPlacementAgent" xlink:title="Definition : us-gaap_SubsequentEventLineItems to rolr_PercentageOfProceedsFromOfferingOfSharesIssuedForEstimationOfNonAccountableExpenseAllowanceToPlacementAgent" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:title="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:title="Definition : us-gaap_SubsequentEventLineItems to us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:title="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:title="Definition : us-gaap_SubsequentEventLineItems to us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantsAndRightsOutstandingTerm" xlink:label="us-gaap_WarrantsAndRightsOutstandingTerm" xlink:title="us-gaap_WarrantsAndRightsOutstandingTerm" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_WarrantsAndRightsOutstandingTerm" xlink:title="Definition : us-gaap_SubsequentEventLineItems to us-gaap_WarrantsAndRightsOutstandingTerm" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_MaterialDefinitiveAgreementDescription" xlink:label="rolr_MaterialDefinitiveAgreementDescription" xlink:title="rolr_MaterialDefinitiveAgreementDescription" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="rolr_MaterialDefinitiveAgreementDescription" xlink:title="Definition : us-gaap_SubsequentEventLineItems to rolr_MaterialDefinitiveAgreementDescription" xlink:type="arc" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTable" xlink:label="us-gaap_SubsequentEventTable" xlink:title="us-gaap_SubsequentEventTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_SubsequentEventTable" xlink:title="Definition : us-gaap_SubsequentEventLineItems to us-gaap_SubsequentEventTable" xlink:type="arc" use="optional" order="11" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="us-gaap_SubsequentEventTypeAxis" xlink:title="us-gaap_SubsequentEventTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_SubsequentEventTypeAxis" xlink:title="Definition : us-gaap_SubsequentEventTable to us-gaap_SubsequentEventTypeAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="us-gaap_SubsequentEventTypeDomain" xlink:title="us-gaap_SubsequentEventTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeDomain" xlink:title="Definition : us-gaap_SubsequentEventTypeAxis to us-gaap_SubsequentEventTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember" xlink:label="us-gaap_SubsequentEventMember" xlink:title="us-gaap_SubsequentEventMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventMember" xlink:title="Definition : us-gaap_SubsequentEventTypeDomain to us-gaap_SubsequentEventMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="us-gaap_SubsequentEventTypeDomain_1" xlink:title="us-gaap_SubsequentEventTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeDomain_1" xlink:title="Definition : us-gaap_SubsequentEventTypeAxis to us-gaap_SubsequentEventTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_AgreementTypeAxis" xlink:label="rolr_AgreementTypeAxis" xlink:title="rolr_AgreementTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_SubsequentEventTable" xlink:to="rolr_AgreementTypeAxis" xlink:title="Definition : us-gaap_SubsequentEventTable to rolr_AgreementTypeAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_AgreementTypeDomain" xlink:label="rolr_AgreementTypeDomain" xlink:title="rolr_AgreementTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="rolr_AgreementTypeAxis" xlink:to="rolr_AgreementTypeDomain" xlink:title="Definition : rolr_AgreementTypeAxis to rolr_AgreementTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_PurchaseAgreementMember" xlink:label="rolr_PurchaseAgreementMember" xlink:title="rolr_PurchaseAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_AgreementTypeDomain" xlink:to="rolr_PurchaseAgreementMember" xlink:title="Definition : rolr_AgreementTypeDomain to rolr_PurchaseAgreementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_PlacementAgentAgreementMember" xlink:label="rolr_PlacementAgentAgreementMember" xlink:title="rolr_PlacementAgentAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_AgreementTypeDomain" xlink:to="rolr_PlacementAgentAgreementMember" xlink:title="Definition : rolr_AgreementTypeDomain to rolr_PlacementAgentAgreementMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_AgreementTypeDomain" xlink:label="rolr_AgreementTypeDomain_1" xlink:title="rolr_AgreementTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="rolr_AgreementTypeAxis" xlink:to="rolr_AgreementTypeDomain_1" xlink:title="Definition : rolr_AgreementTypeAxis to rolr_AgreementTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:label="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="us-gaap_SubsidiarySaleOfStockAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="Definition : us-gaap_SubsequentEventTable to us-gaap_SubsidiarySaleOfStockAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrivatePlacementMember" xlink:label="us-gaap_PrivatePlacementMember" xlink:title="us-gaap_PrivatePlacementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="us-gaap_PrivatePlacementMember" xlink:title="Definition : us-gaap_SaleOfStockNameOfTransactionDomain to us-gaap_PrivatePlacementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_RegisteredDirectOfferingMember" xlink:label="rolr_RegisteredDirectOfferingMember" xlink:title="rolr_RegisteredDirectOfferingMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="rolr_RegisteredDirectOfferingMember" xlink:title="Definition : us-gaap_SaleOfStockNameOfTransactionDomain to rolr_RegisteredDirectOfferingMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis" xlink:title="us-gaap_FinancialInstrumentAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_FinancialInstrumentAxis" xlink:title="Definition : us-gaap_SubsequentEventTable to us-gaap_FinancialInstrumentAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:title="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:title="Definition : us-gaap_FinancialInstrumentAxis to us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember" xlink:title="us-gaap_CommonStockMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="us-gaap_CommonStockMember" xlink:title="Definition : us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain to us-gaap_CommonStockMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1" xlink:title="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1" xlink:title="Definition : us-gaap_FinancialInstrumentAxis to us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="us-gaap_ClassOfWarrantOrRightAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="Definition : us-gaap_SubsequentEventTable to us-gaap_ClassOfWarrantOrRightAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_PlacementAgentWarrantsMember" xlink:label="rolr_PlacementAgentWarrantsMember" xlink:title="rolr_PlacementAgentWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="rolr_PlacementAgentWarrantsMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to rolr_PlacementAgentWarrantsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SHAREBASEDCOMPENSATIONDetailsTextual">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:title="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:title="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested" xlink:title="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_ClassOfWarrantOrRightIssuedInPeriod" xlink:label="rolr_ClassOfWarrantOrRightIssuedInPeriod" xlink:title="rolr_ClassOfWarrantOrRightIssuedInPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="rolr_ClassOfWarrantOrRightIssuedInPeriod" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to rolr_ClassOfWarrantOrRightIssuedInPeriod" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="arc" order="6" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis" xlink:label="us-gaap_PlanNameAxis" xlink:title="us-gaap_PlanNameAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_PlanNameAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_PlanNameAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain" xlink:label="us-gaap_PlanNameDomain" xlink:title="us-gaap_PlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameDomain" xlink:title="Definition : us-gaap_PlanNameAxis to us-gaap_PlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_The2024EquityIncentivePlanMember" xlink:label="rolr_The2024EquityIncentivePlanMember" xlink:title="rolr_The2024EquityIncentivePlanMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PlanNameDomain" xlink:to="rolr_The2024EquityIncentivePlanMember" xlink:title="Definition : us-gaap_PlanNameDomain to rolr_The2024EquityIncentivePlanMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain" xlink:label="us-gaap_PlanNameDomain_1" xlink:title="us-gaap_PlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameDomain_1" xlink:title="Definition : us-gaap_PlanNameAxis to us-gaap_PlanNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis" xlink:title="us-gaap_AwardTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_AwardTypeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_AwardTypeAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="us-gaap_EmployeeStockOptionMember" xlink:title="us-gaap_EmployeeStockOptionMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_EmployeeStockOptionMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_EmployeeStockOptionMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="us-gaap_RestrictedStockUnitsRSUMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_RestrictedStockUnitsRSUMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PerformanceSharesMember" xlink:label="us-gaap_PerformanceSharesMember" xlink:title="us-gaap_PerformanceSharesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_PerformanceSharesMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_PerformanceSharesMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_TimebasedRestrictedStockUnitsMember" xlink:label="rolr_TimebasedRestrictedStockUnitsMember" xlink:title="rolr_TimebasedRestrictedStockUnitsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="rolr_TimebasedRestrictedStockUnitsMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to rolr_TimebasedRestrictedStockUnitsMember" xlink:type="arc" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="us-gaap_ClassOfWarrantOrRightAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_ClassOfWarrantOrRightAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_WarrantsMember" xlink:label="rolr_WarrantsMember" xlink:title="rolr_WarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="rolr_WarrantsMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to rolr_WarrantsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/NATUREOFOPERATIONSDetailsTextual">
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" xlink:label="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" xlink:title="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:label="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:title="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" xlink:to="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems to us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:label="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:title="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" xlink:to="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems to us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:title="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" xlink:to="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems to us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare" xlink:title="us-gaap_CommonStockParOrStatedValuePerShare" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems to us-gaap_CommonStockParOrStatedValuePerShare" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockPricePerShare" xlink:label="us-gaap_SaleOfStockPricePerShare" xlink:title="us-gaap_SaleOfStockPricePerShare" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" xlink:to="us-gaap_SaleOfStockPricePerShare" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems to us-gaap_SaleOfStockPricePerShare" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:title="us-gaap_ProceedsFromIssuanceOfPrivatePlacement" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" xlink:to="us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems to us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_MaterialDefinitiveAgreementDescription" xlink:label="rolr_MaterialDefinitiveAgreementDescription" xlink:title="rolr_MaterialDefinitiveAgreementDescription" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" xlink:to="rolr_MaterialDefinitiveAgreementDescription" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems to rolr_MaterialDefinitiveAgreementDescription" xlink:type="arc" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfStockIssuanceCosts" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts" xlink:title="us-gaap_PaymentsOfStockIssuanceCosts" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" xlink:to="us-gaap_PaymentsOfStockIssuanceCosts" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems to us-gaap_PaymentsOfStockIssuanceCosts" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" xlink:label="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" xlink:title="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" xlink:to="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems to rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" xlink:type="arc" order="8" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonmonetaryTransactionTypeAxis" xlink:label="us-gaap_NonmonetaryTransactionTypeAxis" xlink:title="us-gaap_NonmonetaryTransactionTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" xlink:to="us-gaap_NonmonetaryTransactionTypeAxis" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable to us-gaap_NonmonetaryTransactionTypeAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonmonetaryTransactionTypeDomain" xlink:label="us-gaap_NonmonetaryTransactionTypeDomain" xlink:title="us-gaap_NonmonetaryTransactionTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_NonmonetaryTransactionTypeAxis" xlink:to="us-gaap_NonmonetaryTransactionTypeDomain" xlink:title="Definition : us-gaap_NonmonetaryTransactionTypeAxis to us-gaap_NonmonetaryTransactionTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_ReverseStockSplitMember" xlink:label="rolr_ReverseStockSplitMember" xlink:title="rolr_ReverseStockSplitMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_NonmonetaryTransactionTypeDomain" xlink:to="rolr_ReverseStockSplitMember" xlink:title="Definition : us-gaap_NonmonetaryTransactionTypeDomain to rolr_ReverseStockSplitMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonmonetaryTransactionTypeDomain" xlink:label="us-gaap_NonmonetaryTransactionTypeDomain_1" xlink:title="us-gaap_NonmonetaryTransactionTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_NonmonetaryTransactionTypeAxis" xlink:to="us-gaap_NonmonetaryTransactionTypeDomain_1" xlink:title="Definition : us-gaap_NonmonetaryTransactionTypeAxis to us-gaap_NonmonetaryTransactionTypeDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="us-gaap_BusinessAcquisitionAxis" xlink:title="us-gaap_BusinessAcquisitionAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" xlink:to="us-gaap_BusinessAcquisitionAxis" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable to us-gaap_BusinessAcquisitionAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain" xlink:title="us-gaap_BusinessAcquisitionAcquireeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_BusinessAcquisitionAxis" xlink:to="us-gaap_BusinessAcquisitionAcquireeDomain" xlink:title="Definition : us-gaap_BusinessAcquisitionAxis to us-gaap_BusinessAcquisitionAcquireeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_HappyHourSolutionsMember" xlink:label="rolr_HappyHourSolutionsMember" xlink:title="rolr_HappyHourSolutionsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_BusinessAcquisitionAcquireeDomain" xlink:to="rolr_HappyHourSolutionsMember" xlink:title="Definition : us-gaap_BusinessAcquisitionAcquireeDomain to rolr_HappyHourSolutionsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_1" xlink:title="us-gaap_BusinessAcquisitionAcquireeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_BusinessAcquisitionAxis" xlink:to="us-gaap_BusinessAcquisitionAcquireeDomain_1" xlink:title="Definition : us-gaap_BusinessAcquisitionAxis to us-gaap_BusinessAcquisitionAcquireeDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_AgreementTypeAxis" xlink:label="rolr_AgreementTypeAxis" xlink:title="rolr_AgreementTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" xlink:to="rolr_AgreementTypeAxis" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable to rolr_AgreementTypeAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_AgreementTypeDomain" xlink:label="rolr_AgreementTypeDomain" xlink:title="rolr_AgreementTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="rolr_AgreementTypeAxis" xlink:to="rolr_AgreementTypeDomain" xlink:title="Definition : rolr_AgreementTypeAxis to rolr_AgreementTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_PurchaseAgreementMember" xlink:label="rolr_PurchaseAgreementMember" xlink:title="rolr_PurchaseAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_AgreementTypeDomain" xlink:to="rolr_PurchaseAgreementMember" xlink:title="Definition : rolr_AgreementTypeDomain to rolr_PurchaseAgreementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_PlacementAgentAgreementMember" xlink:label="rolr_PlacementAgentAgreementMember" xlink:title="rolr_PlacementAgentAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="rolr_AgreementTypeDomain" xlink:to="rolr_PlacementAgentAgreementMember" xlink:title="Definition : rolr_AgreementTypeDomain to rolr_PlacementAgentAgreementMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_AgreementTypeDomain" xlink:label="rolr_AgreementTypeDomain_1" xlink:title="rolr_AgreementTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="rolr_AgreementTypeAxis" xlink:to="rolr_AgreementTypeDomain_1" xlink:title="Definition : rolr_AgreementTypeAxis to rolr_AgreementTypeDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:label="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="us-gaap_SubsidiarySaleOfStockAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" xlink:to="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable to us-gaap_SubsidiarySaleOfStockAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrivatePlacementMember" xlink:label="us-gaap_PrivatePlacementMember" xlink:title="us-gaap_PrivatePlacementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="us-gaap_PrivatePlacementMember" xlink:title="Definition : us-gaap_SaleOfStockNameOfTransactionDomain to us-gaap_PrivatePlacementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_RegisteredDirectOfferingMember" xlink:label="rolr_RegisteredDirectOfferingMember" xlink:title="rolr_RegisteredDirectOfferingMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="rolr_RegisteredDirectOfferingMember" xlink:title="Definition : us-gaap_SaleOfStockNameOfTransactionDomain to rolr_RegisteredDirectOfferingMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis" xlink:title="us-gaap_FinancialInstrumentAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" xlink:to="us-gaap_FinancialInstrumentAxis" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable to us-gaap_FinancialInstrumentAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:title="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:title="Definition : us-gaap_FinancialInstrumentAxis to us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember" xlink:title="us-gaap_CommonStockMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="us-gaap_CommonStockMember" xlink:title="Definition : us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain to us-gaap_CommonStockMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1" xlink:title="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1" xlink:title="Definition : us-gaap_FinancialInstrumentAxis to us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="us-gaap_ClassOfWarrantOrRightAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" xlink:to="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable to us-gaap_ClassOfWarrantOrRightAxis" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="rolr-20260331.xsd#rolr_PlacementAgentWarrantsMember" xlink:label="rolr_PlacementAgentWarrantsMember" xlink:title="rolr_PlacementAgentWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="rolr_PlacementAgentWarrantsMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to rolr_PlacementAgentWarrantsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="us-gaap_SubsequentEventTypeAxis" xlink:title="us-gaap_SubsequentEventTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" xlink:to="us-gaap_SubsequentEventTypeAxis" xlink:title="Definition : rolr_OrganizationConsolidationAndPresentationOfFinancialStatementsTable to us-gaap_SubsequentEventTypeAxis" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="us-gaap_SubsequentEventTypeDomain" xlink:title="us-gaap_SubsequentEventTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeDomain" xlink:title="Definition : us-gaap_SubsequentEventTypeAxis to us-gaap_SubsequentEventTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember" xlink:label="us-gaap_SubsequentEventMember" xlink:title="us-gaap_SubsequentEventMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventMember" xlink:title="Definition : us-gaap_SubsequentEventTypeDomain to us-gaap_SubsequentEventMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSUnauditedParentheticals" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSUnaudited" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/NATUREOFOPERATIONS" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/REVENUE" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/CASHANDCASHEQUIVALENTS" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/PREPAIDEXPENSESANDOTHERCURRENTASSETS" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/INTANGIBLEASSETSNET" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/PROPERTYANDEQUIPMENT" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/ACCRUEDEXPENSES" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/STOCKHOLDERSEQUITY" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/NETGAINLOSSPERSHARE" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SHAREBASEDCOMPENSATION" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/RELATEDPARTYTRANSACTIONS" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/INCOMETAXES" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/COMMITMENTANDCONTINGENCIES" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/LEASES" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SEGMENTREPORTING" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/DISCONTINUEDOPERATIONS" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SUBSEQUENTEVENTS" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SIGNIFICANTACCOUNTINGPOLICIESPolicies" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/REVENUETables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/CASHANDCASHEQUIVALENTSTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/PREPAIDEXPENSESANDOTHERCURRENTASSETSTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/INTANGIBLEASSETSNETTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/PROPERTYANDEQUIPMENTTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/ACCRUEDEXPENSESTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/NETINCOMELOSSPERSHARETables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/RELATEDPARTYTRANSACTIONSTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/LEASESTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SEGMENTREPORTINGTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/DISCONTINUEDOPERATIONSTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/CASHANDCASHEQUIVALENTSReconciliationofCashandCashEquivalentsDetails" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/PREPAIDEXPENSESANDOTHERCURRENTASSETSScheduleofPrepaidExpensesandOtherCurrentAssetsDetails" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/INTANGIBLEASSETSNETDetailsTextual" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/PROPERTYANDEQUIPMENTDetailsTextual" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/PROPERTYANDEQUIPMENTScheduleofPropertyPlantandEquipmentDetails" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/ACCRUEDEXPENSESDetails" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/STOCKHOLDERSEQUITYDetailsTextual" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/NETINCOMELOSSPERSHAREScheduleofEarningsPerShareDetails" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SHAREBASEDCOMPENSATIONScheduleofStockOptionActivityDetails" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/LEASESMaturityOfLeasesDetails" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/LEASESMaturityOfLeasesDetailsCalc2" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SEGMENTREPORTINGDetailsTextual" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/SEGMENTREPORTINGFinancialResultsDetails" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.highroller.com/role/DISCONTINUEDOPERATIONSScheduleofcashflowsfromoperationsandinvestingofdiscontinuedoperationsDetails" />
</link:linkbase>
