SEC Info  
    Home      Search      My Interests      Help      Sign In      Please Sign In

SLR Investment Corp. – ‘10-K’ for 12/31/23 – ‘EX-101.DEF’

On:  Tuesday, 2/27/24, at 4:13pm ET   ·   For:  12/31/23   ·   Accession #:  1193125-24-47930   ·   File #:  814-00754

Previous ‘10-K’:  ‘10-K’ on 2/28/23 for 12/31/22   ·   Latest ‘10-K’:  This Filing   ·   21 References:   

Find Words in Filings emoji
 
  in    Show  and   Hints

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 2/27/24  SLR Investment Corp.              10-K       12/31/23  104:25M                                    Donnelley … Solutions/FA

Annual Report   —   Form 10-K   —   SEA’34

Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-K        Annual Report                                       HTML   6.45M 
 2: EX-21.1     Subsidiaries List                                   HTML     27K 
 3: EX-23.1     Consent of Expert or Counsel                        HTML     27K 
 4: EX-23.2     Consent of Expert or Counsel                        HTML     27K 
 5: EX-23.3     Consent of Expert or Counsel                        HTML     27K 
 6: EX-23.4     Consent of Expert or Counsel                        HTML     27K 
 7: EX-23.5     Consent of Expert or Counsel                        HTML     27K 
 8: EX-23.6     Consent of Expert or Counsel                        HTML     27K 
15: EX-97.1     Clawback Policy re: Recovery of Erroneously         HTML     48K 
                Awarded Compensation                                             
16: EX-99.1     Miscellaneous Exhibit                               HTML    250K 
17: EX-99.2     Miscellaneous Exhibit                               HTML    258K 
18: EX-99.3     Miscellaneous Exhibit                               HTML    247K 
19: EX-99.4     Miscellaneous Exhibit                               HTML    167K 
20: EX-99.5     Miscellaneous Exhibit                               HTML    167K 
21: EX-99.6     Miscellaneous Exhibit                               HTML     29K 
 9: EX-31.1     Certification -- §302 - SOA'02                      HTML     31K 
10: EX-31.2     Certification -- §302 - SOA'02                      HTML     31K 
11: EX-31.3     Certification -- §302 - SOA'02                      HTML     31K 
12: EX-32.1     Certification -- §906 - SOA'02                      HTML     28K 
13: EX-32.2     Certification -- §906 - SOA'02                      HTML     28K 
14: EX-32.3     Certification -- §906 - SOA'02                      HTML     28K 
27: R1          Cover Page                                          HTML     98K 
28: R2          Consolidated Statements of Assets And Liabilities   HTML    121K 
29: R3          Consolidated Statements of Assets And Liabilities   HTML     55K 
                (Parenthetical)                                                  
30: R4          Consolidated Statements of Operations               HTML    111K 
31: R5          Consolidated Statements of Changes In Net Assets    HTML     83K 
32: R6          Consolidated Statements of Cash Flows               HTML    120K 
33: R7          Consolidated Statements of Cash Flows               HTML     33K 
                (Parenthetical)                                                  
34: R8          Consolidated Schedule of Investments                HTML   2.35M 
35: R9          Consolidated Schedule of Investments                HTML    236K 
                (Parenthetical)                                                  
36: R10         Pay vs Performance Disclosure                       HTML     41K 
37: R11         Insider Trading Arrangements                        HTML     35K 
38: R12         N-2                                                 HTML   1.23M 
39: R13         Organization                                        HTML     34K 
40: R14         Significant Accounting Policies                     HTML     59K 
41: R15         Agreements                                          HTML     38K 
42: R16         Net Asset Value Per Share                           HTML     30K 
43: R17         Earnings Per Share                                  HTML     37K 
44: R18         Fair Value                                          HTML    156K 
45: R19         Debt                                                HTML     66K 
46: R20         Income Tax Information and Distributions to         HTML     67K 
                Stockholders and Other Tax Information                           
47: R21         Financial Highlights                                HTML     80K 
48: R22         SLR Credit Solutions                                HTML     32K 
49: R23         SLR Equipment Finance                               HTML     41K 
50: R24         Kingsbridge Holdings, LLC                           HTML     34K 
51: R25         SLR Healthcare ABL                                  HTML     33K 
52: R26         SLR Business Credit                                 HTML     35K 
53: R27         Commitments and Contingencies                       HTML     94K 
54: R28         Capital Share Transactions                          HTML     40K 
55: R29         Stock Repurchase Program                            HTML     37K 
56: R30         SLR Senior Lending Program LLC                      HTML    184K 
57: R31         Subsequent Events                                   HTML     31K 
58: R32         Earnings Per Share (Tables)                         HTML     36K 
59: R33         Fair Value (Tables)                                 HTML    154K 
60: R34         Debt (Tables)                                       HTML     56K 
61: R35         Income Tax Information and Distributions to         HTML     64K 
                Stockholders and Other Tax Information (Tables)                  
62: R36         Financial Highlights (Tables)                       HTML     79K 
63: R37         Commitments and Contingencies (Tables)              HTML     91K 
64: R38         Capital Share Transactions (Tables)                 HTML     40K 
65: R39         SLR Senior Lending Program LLC (Tables)             HTML    183K 
66: R40         Organization - Additional Information (Details)     HTML     50K 
67: R41         Significant Accounting Policies - Additional        HTML     39K 
                Information (Details)                                            
68: R42         Agreements - Additional Information (Details)       HTML     57K 
69: R43         Net Asset Value Per Share - Additional Information  HTML     37K 
                (Details)                                                        
70: R44         Earnings Per Share - Summary of Computation of      HTML     58K 
                Basic and Diluted Net (Details)                                  
71: R45         Fair Value - Summary of Assets and Liabilities      HTML     74K 
                Measured at Fair Value on a Recurring Basis                      
                (Details)                                                        
72: R46         Fair Value - Summary of Changes in Fair Value of    HTML     70K 
                Level 3 Assets and Liabilities (Details)                         
73: R47         Fair Value - Summary of Fair Valued Liabilities     HTML     44K 
                measured using Significant Unobservable Inputs                   
                (Level 3) (Details)                                              
74: R48         Fair Value - Summary of Fair Valued Liabilities     HTML     49K 
                measured using Significant Unobservable Inputs                   
                (Level 3) (Parenthetical) (Details)                              
75: R49         Fair Value - Summary of Quantitative Information    HTML     63K 
                about the Company's Level 3 Asset and Liability                  
                (Details)                                                        
76: R50         Fair Value - Summary of Quantitative Information    HTML     86K 
                about the Company's Level 3 Asset and Liability                  
                (Parenthetical) (Details)                                        
77: R51         Debt - Schedule of Long-term Debt Instruments       HTML     68K 
                (Details)                                                        
78: R52         Debt - Schedule of Long-term Debt Instruments       HTML     56K 
                (Parenthetical) (Details)                                        
79: R53         Debt - Additional Information (Details)             HTML    148K 
80: R54         Income Tax Information and Distributions to         HTML     69K 
                Stockholders and Other Tax Information - Summary                 
                of distributions to shareholders (Details)                       
81: R55         Income Tax Information and Distributions to         HTML     46K 
                Stockholders and Other Tax Information - Summary                 
                of total accumulated earnings (Loss) on A Tax                    
                Basis (Details)                                                  
82: R56         Income Tax Information and Distributions to         HTML     61K 
                Stockholders and Other Tax Information -                         
                Additional information (Details)                                 
83: R57         Financial Highlights - Schedule of Financial        HTML     76K 
                Highlights (Details)                                             
84: R58         Financial Highlights - Schedule of Financial        HTML     32K 
                Highlights (Parentheticals) (Details)                            
85: R59         SLR Credit Solutions - Additional Information       HTML     89K 
                (Details)                                                        
86: R60         SLR Equipment Finance - Additional Information      HTML     81K 
                (Details)                                                        
87: R61         Kingsbridge Holdings, LLC - Additional Information  HTML     73K 
                (Details)                                                        
88: R62         SLR Healthcare ABL - Additional Information         HTML     94K 
                (Details)                                                        
89: R63         SLR Business Credit - Additional Information        HTML    110K 
                (Details)                                                        
90: R64         Commitments and Contingencies - Additional          HTML     30K 
                Information (Details)                                            
91: R65         Commitments and Contingencies - Summary of          HTML    216K 
                Unfunded Debt and Equity Commitments (Details)                   
92: R66         Capital Share Transactions - Additional             HTML     32K 
                Information (Details)                                            
93: R67         Capital Share Transactions - Summary of             HTML     47K 
                Transactions In Capital Stock (Details)                          
94: R68         Stock Repurchase Program - Additional Information   HTML     42K 
                (Details)                                                        
95: R69         SLR Senior Lending Program LLC - Summary of SSLP's  HTML   1.45M 
                portfolio (Details)                                              
96: R70         SLR Senior Lending Program LLC - Summary financial  HTML    129K 
                information for SSLP (Details)                                   
97: R71         SLR Senior Lending Program LLC - Summary financial  HTML     38K 
                information for SSLP (Parenthetical) (Details)                   
98: R72         SLR Senior Lending Program LLC - Additional         HTML     82K 
                Information (Details)                                            
99: R73         Subsequent Events - Additional Information          HTML     33K 
                (Details)                                                        
101: XML         IDEA XML File -- Filing Summary                      XML    164K  
104: XML         XBRL Instance -- d772201d10k_htm                     XML  10.17M  
100: EXCEL       IDEA Workbook of Financial Report Info              XLSX    460K  
23: EX-101.CAL  XBRL Calculations -- slrc-20231231_cal               XML    130K 
24: EX-101.DEF  XBRL Definitions -- slrc-20231231_def                XML   1.26M 
25: EX-101.LAB  XBRL Labels -- slrc-20231231_lab                     XML   1.49M 
26: EX-101.PRE  XBRL Presentations -- slrc-20231231_pre              XML   1.32M 
22: EX-101.SCH  XBRL Schema -- slrc-20231231                         XSD    324K 
102: JSON        XBRL Instance as JSON Data -- MetaLinks              649±   919K  
103: ZIP         XBRL Zipped Folder -- 0001193125-24-047930-xbrl      Zip   1.01M  


‘EX-101.DEF’   —   XBRL Definitions — slrc-20231231_def


This Exhibit is an XBRL File.


                                                                                                                                                                                
<?xml version="1.0" encoding="windows-1252"?>
<!-- Generated by DFIN XBRL Instance Document - http://www.dfinsolutions.com/ - Version R3.0 - on 27-February-2024 [10:15:50] {PM} -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:xbrldt="http://xbrl.org/2005/xbrldt">
<roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/cef/2023/cef-2023.xsd#RiskOnly" roleURI="http://xbrl.sec.gov/cef/role/RiskOnly"/>
<roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/cef/2023/cef-2023.xsd#SecurityOnly" roleURI="http://xbrl.sec.gov/cef/role/SecurityOnly"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#CoverPage" roleURI="http://www.slrinvestments.com/role/CoverPage"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#ConsolidatedStatementsOfAssetsAndLiabilities" roleURI="http://www.slrinvestments.com/role/ConsolidatedStatementsOfAssetsAndLiabilities"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#ConsolidatedStatementsOfAssetsAndLiabilitiesParenthetical" roleURI="http://www.slrinvestments.com/role/ConsolidatedStatementsOfAssetsAndLiabilitiesParenthetical"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#ConsolidatedStatementsOfOperations" roleURI="http://www.slrinvestments.com/role/ConsolidatedStatementsOfOperations"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#ConsolidatedStatementsOfChangesInNetAssets" roleURI="http://www.slrinvestments.com/role/ConsolidatedStatementsOfChangesInNetAssets"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#ConsolidatedStatementsOfCashFlows" roleURI="http://www.slrinvestments.com/role/ConsolidatedStatementsOfCashFlows"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#ConsolidatedScheduleOfInvestments" roleURI="http://www.slrinvestments.com/role/ConsolidatedScheduleOfInvestments"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#ConsolidatedScheduleOfInvestmentsParenthetical" roleURI="http://www.slrinvestments.com/role/ConsolidatedScheduleOfInvestmentsParenthetical"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#SlrEquipmentFinance" roleURI="http://www.slrinvestments.com/role/SlrEquipmentFinance"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#OrganizationAdditionalInformationDetails" roleURI="http://www.slrinvestments.com/role/OrganizationAdditionalInformationDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#SignificantAccountingPoliciesAdditionalInformationDetails" roleURI="http://www.slrinvestments.com/role/SignificantAccountingPoliciesAdditionalInformationDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#AgreementsAdditionalInformationDetails" roleURI="http://www.slrinvestments.com/role/AgreementsAdditionalInformationDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#FairValueSummaryOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" roleURI="http://www.slrinvestments.com/role/FairValueSummaryOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#FairValueSummaryOfChangesInFairValueOfLevel3AssetsAndLiabilitiesDetails" roleURI="http://www.slrinvestments.com/role/FairValueSummaryOfChangesInFairValueOfLevel3AssetsAndLiabilitiesDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#FairValueSummaryOfFairValuedLiabilitiesMeasuredUsingSignificantUnobservableInputsLevel3Details" roleURI="http://www.slrinvestments.com/role/FairValueSummaryOfFairValuedLiabilitiesMeasuredUsingSignificantUnobservableInputsLevel3Details"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#FairValueSummaryOfFairValuedLiabilitiesMeasuredUsingSignificantUnobservableInputsLevel3ParentheticalDetails" roleURI="http://www.slrinvestments.com/role/FairValueSummaryOfFairValuedLiabilitiesMeasuredUsingSignificantUnobservableInputsLevel3ParentheticalDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#FairValueSummaryOfQuantitativeInformationAboutTheCompanysLevel3AssetAndLiabilityDetails" roleURI="http://www.slrinvestments.com/role/FairValueSummaryOfQuantitativeInformationAboutTheCompanysLevel3AssetAndLiabilityDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#FairValueSummaryOfQuantitativeInformationAboutTheCompanysLevel3AssetAndLiabilityParentheticalDetails" roleURI="http://www.slrinvestments.com/role/FairValueSummaryOfQuantitativeInformationAboutTheCompanysLevel3AssetAndLiabilityParentheticalDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#DebtScheduleOfLongTermDebtInstrumentsDetails" roleURI="http://www.slrinvestments.com/role/DebtScheduleOfLongTermDebtInstrumentsDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#DebtScheduleOfLongTermDebtInstrumentsParentheticalDetails" roleURI="http://www.slrinvestments.com/role/DebtScheduleOfLongTermDebtInstrumentsParentheticalDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#DebtAdditionalInformationDetails" roleURI="http://www.slrinvestments.com/role/DebtAdditionalInformationDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#IncomeTaxInformationAndDistributionsToStockholdersAndOtherTaxInformationSummaryOfDistributionsToShareholdersDetails" roleURI="http://www.slrinvestments.com/role/IncomeTaxInformationAndDistributionsToStockholdersAndOtherTaxInformationSummaryOfDistributionsToShareholdersDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#IncomeTaxInformationAndDistributionsToStockholdersAndOtherTaxInformationSummaryOfTotalAccumulatedEarningsLossOnATaxBasisDetails" roleURI="http://www.slrinvestments.com/role/IncomeTaxInformationAndDistributionsToStockholdersAndOtherTaxInformationSummaryOfTotalAccumulatedEarningsLossOnATaxBasisDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#IncomeTaxInformationAndDistributionsToStockholdersAndOtherTaxInformationAdditionalInformationDetails" roleURI="http://www.slrinvestments.com/role/IncomeTaxInformationAndDistributionsToStockholdersAndOtherTaxInformationAdditionalInformationDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#SlrCreditSolutionsAdditionalInformationDetails" roleURI="http://www.slrinvestments.com/role/SlrCreditSolutionsAdditionalInformationDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#SlrEquipmentFinanceAdditionalInformationDetails" roleURI="http://www.slrinvestments.com/role/SlrEquipmentFinanceAdditionalInformationDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#KingsbridgeHoldingsLlcAdditionalInformationDetails" roleURI="http://www.slrinvestments.com/role/KingsbridgeHoldingsLlcAdditionalInformationDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#SlrHealthcareAblAdditionalInformationDetails" roleURI="http://www.slrinvestments.com/role/SlrHealthcareAblAdditionalInformationDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#SlrBusinessCreditAdditionalInformationDetails" roleURI="http://www.slrinvestments.com/role/SlrBusinessCreditAdditionalInformationDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#CommitmentsAndContingenciesAdditionalInformationDetails" roleURI="http://www.slrinvestments.com/role/CommitmentsAndContingenciesAdditionalInformationDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#CommitmentsAndContingenciesSummaryOfUnfundedDebtAndEquityCommitmentsDetails" roleURI="http://www.slrinvestments.com/role/CommitmentsAndContingenciesSummaryOfUnfundedDebtAndEquityCommitmentsDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#CapitalShareTransactionsSummaryOfTransactionsInCapitalStockDetails" roleURI="http://www.slrinvestments.com/role/CapitalShareTransactionsSummaryOfTransactionsInCapitalStockDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#SlrSeniorLendingProgramLlcSummaryOfSslpSPortfolioDetails" roleURI="http://www.slrinvestments.com/role/SlrSeniorLendingProgramLlcSummaryOfSslpSPortfolioDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#SlrSeniorLendingProgramLlcSummaryFinancialInformationForSslpDetails" roleURI="http://www.slrinvestments.com/role/SlrSeniorLendingProgramLlcSummaryFinancialInformationForSslpDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#SlrSeniorLendingProgramLlcSummaryFinancialInformationForSslpParentheticalDetails" roleURI="http://www.slrinvestments.com/role/SlrSeniorLendingProgramLlcSummaryFinancialInformationForSslpParentheticalDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#SlrSeniorLendingProgramLlcAdditionalInformationDetails" roleURI="http://www.slrinvestments.com/role/SlrSeniorLendingProgramLlcAdditionalInformationDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#SubsequentEventsAdditionalInformationDetails" roleURI="http://www.slrinvestments.com/role/SubsequentEventsAdditionalInformationDetails"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#SlrSeniorLendingProgramLlcSummaryOfSslpSPortfolioDetailsAlternate" roleURI="http://www.slrinvestments.com/role/SlrSeniorLendingProgramLlcSummaryOfSslpSPortfolioDetailsAlternate"/>
<roleRef xlink:type="simple" xlink:href="slrc-20231231.xsd#ConsolidatedScheduleOfInvestmentsAlternate" roleURI="http://www.slrinvestments.com/role/ConsolidatedScheduleOfInvestmentsAlternate"/>
<roleRef xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-roles-2023.xsd#eedm" roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists"/>
<arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
<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"/>
<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"/>
<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"/>
<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"/>
<arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/notAll" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#notAll"/>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/CoverPage">
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentInformationLineItems" xlink:label="loc_dei_DocumentInformationLineItems_1428212"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentInformationTable" xlink:label="loc_dei_DocumentInformationTable_1428209"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_DocumentInformationTable_1428209" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_1428210"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_1428209" xlink:to="loc_us-gaap_StatementClassOfStockAxis_1428210" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1428211"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1428210" xlink:to="loc_us-gaap_ClassOfStockDomain_1428211" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1428211_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1428210" xlink:to="loc_us-gaap_ClassOfStockDomain_1428211_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_1428215"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_DocumentType_1428215" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_1428216"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_AmendmentFlag_1428216" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_1428217"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_DocumentPeriodEndDate_1428217" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_1428218"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_DocumentFiscalYearFocus_1428218" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_1428219"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_DocumentFiscalPeriodFocus_1428219" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_1428220"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityRegistrantName_1428220" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityFileNumber" xlink:label="loc_dei_EntityFileNumber_1692255"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityFileNumber_1692255" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityTaxIdentificationNumber" xlink:label="loc_dei_EntityTaxIdentificationNumber_1428222"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityTaxIdentificationNumber_1428222" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol_1428223"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_TradingSymbol_1428223" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_1428225"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityCentralIndexKey_1428225" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_1428227"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_CurrentFiscalYearEndDate_1428227" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentAnnualReport" xlink:label="loc_dei_DocumentAnnualReport_1428228"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_DocumentAnnualReport_1428228" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentTransitionReport" xlink:label="loc_dei_DocumentTransitionReport_1428231"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_DocumentTransitionReport_1428231" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCurrentReportingStatus" xlink:label="loc_dei_EntityCurrentReportingStatus_1428232"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityCurrentReportingStatus_1428232" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_1428234"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityFilerCategory_1428234" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityInteractiveDataCurrent" xlink:label="loc_dei_EntityInteractiveDataCurrent_1428235"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityInteractiveDataCurrent_1428235" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CityAreaCode" xlink:label="loc_dei_CityAreaCode_1428241"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_CityAreaCode_1428241" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LocalPhoneNumber" xlink:label="loc_dei_LocalPhoneNumber_1428242"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_LocalPhoneNumber_1428242" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntitySmallBusiness" xlink:label="loc_dei_EntitySmallBusiness_1428243"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntitySmallBusiness_1428243" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityEmergingGrowthCompany" xlink:label="loc_dei_EntityEmergingGrowthCompany_1428245"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityEmergingGrowthCompany_1428245" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressAddressLine1" xlink:label="loc_dei_EntityAddressAddressLine1_1428248"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityAddressAddressLine1_1428248" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityShellCompany" xlink:label="loc_dei_EntityShellCompany_1428249"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityShellCompany_1428249" use="optional" order="26"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_Security12bTitle" xlink:label="loc_dei_Security12bTitle_1428250"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_Security12bTitle_1428250" use="optional" order="27"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SecurityExchangeName" xlink:label="loc_dei_SecurityExchangeName_1428253"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_SecurityExchangeName_1428253" use="optional" order="28"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressStateOrProvince" xlink:label="loc_dei_EntityAddressStateOrProvince_1428254"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityAddressStateOrProvince_1428254" use="optional" order="29"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressCityOrTown" xlink:label="loc_dei_EntityAddressCityOrTown_1428255"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityAddressCityOrTown_1428255" use="optional" order="30"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressPostalZipCode" xlink:label="loc_dei_EntityAddressPostalZipCode_1428256"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityAddressPostalZipCode_1428256" use="optional" order="31"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="loc_dei_EntityIncorporationStateCountryCode_1428258"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityIncorporationStateCountryCode_1428258" use="optional" order="32"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_1428259"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_1428259" use="optional" order="33"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_1329"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityWellKnownSeasonedIssuer_1329" use="optional" order="34"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityVoluntaryFilers" xlink:label="loc_dei_EntityVoluntaryFilers_1330"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityVoluntaryFilers_1330" use="optional" order="35"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_IcfrAuditorAttestationFlag" xlink:label="loc_dei_IcfrAuditorAttestationFlag_1331"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_IcfrAuditorAttestationFlag_1331" use="optional" order="36"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentFinStmtErrorCorrectionFlag" xlink:label="loc_dei_DocumentFinStmtErrorCorrectionFlag_1699115"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_DocumentFinStmtErrorCorrectionFlag_1699115" use="optional" order="37"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityPublicFloat" xlink:label="loc_dei_EntityPublicFloat_1332"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_EntityPublicFloat_1332" use="optional" order="38"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AuditorName" xlink:label="loc_dei_AuditorName_1333"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_AuditorName_1333" use="optional" order="39"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AuditorLocation" xlink:label="loc_dei_AuditorLocation_1334"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_AuditorLocation_1334" use="optional" order="40"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AuditorFirmId" xlink:label="loc_dei_AuditorFirmId_1697990"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1428212" xlink:to="loc_dei_AuditorFirmId_1697990" use="optional" order="41"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/ConsolidatedStatementsOfAssetsAndLiabilities">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_1426269"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_1426266"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1426269" xlink:to="loc_us-gaap_StatementTable_1426266" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentHoldingsAxis" xlink:label="loc_slrc_InvestmentHoldingsAxis_1426276"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1426266" xlink:to="loc_slrc_InvestmentHoldingsAxis_1426276" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentHoldingsDomain" xlink:label="loc_slrc_InvestmentHoldingsDomain_1426277"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_slrc_InvestmentHoldingsAxis_1426276" xlink:to="loc_slrc_InvestmentHoldingsDomain_1426277" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentHoldingsDomain" xlink:label="loc_slrc_InvestmentHoldingsDomain_1426277_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_slrc_InvestmentHoldingsAxis_1426276" xlink:to="loc_slrc_InvestmentHoldingsDomain_1426277_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CompaniesLessThanFivePercentageOwnedMember" xlink:label="loc_slrc_CompaniesLessThanFivePercentageOwnedMember_1426281"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentHoldingsDomain_1426277" xlink:to="loc_slrc_CompaniesLessThanFivePercentageOwnedMember_1426281" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CompaniesMoreThanFivePercentageAndLessThanTwentyFivePercentageOwnedMember" xlink:label="loc_slrc_CompaniesMoreThanFivePercentageAndLessThanTwentyFivePercentageOwnedMember_1697993"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentHoldingsDomain_1426277" xlink:to="loc_slrc_CompaniesMoreThanFivePercentageAndLessThanTwentyFivePercentageOwnedMember_1697993" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CompaniesMoreThanTwentyFivePercentageOwnedMember" xlink:label="loc_slrc_CompaniesMoreThanTwentyFivePercentageOwnedMember_1426286"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentHoldingsDomain_1426277" xlink:to="loc_slrc_CompaniesMoreThanTwentyFivePercentageOwnedMember_1426286" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_1426246"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1426269" xlink:to="loc_us-gaap_AssetsAbstract_1426246" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentOwnedAtFairValueAbstract" xlink:label="loc_slrc_InvestmentOwnedAtFairValueAbstract_1426261"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_1426246" xlink:to="loc_slrc_InvestmentOwnedAtFairValueAbstract_1426261" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="loc_us-gaap_InvestmentOwnedAtFairValue_1426289"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentOwnedAtFairValueAbstract_1426261" xlink:to="loc_us-gaap_InvestmentOwnedAtFairValue_1426289" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Cash" xlink:label="loc_us-gaap_Cash_1426292"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_1426246" xlink:to="loc_us-gaap_Cash_1426292" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashEquivalentsAtCarryingValue_1426293"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_1426246" xlink:to="loc_us-gaap_CashEquivalentsAtCarryingValue_1426293" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DividendsReceivable" xlink:label="loc_us-gaap_DividendsReceivable_1426294"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_1426246" xlink:to="loc_us-gaap_DividendsReceivable_1426294" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestReceivable" xlink:label="loc_us-gaap_InterestReceivable_1426296"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_1426246" xlink:to="loc_us-gaap_InterestReceivable_1426296" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReceivableInvestmentSale" xlink:label="loc_us-gaap_ReceivableInvestmentSale_1426306"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_1426246" xlink:to="loc_us-gaap_ReceivableInvestmentSale_1426306" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrepaidExpenseAndOtherAssets" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssets_1426308"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_1426246" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssets_1426308" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_1426309"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_1426246" xlink:to="loc_us-gaap_Assets_1426309" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAbstract" xlink:label="loc_us-gaap_LiabilitiesAbstract_1426311"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1426269" xlink:to="loc_us-gaap_LiabilitiesAbstract_1426311" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount" xlink:label="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_1426378"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_1426311" xlink:to="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_1426378" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PayableInvestmentPurchase" xlink:label="loc_us-gaap_PayableInvestmentPurchase_1426427"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_1426311" xlink:to="loc_us-gaap_PayableInvestmentPurchase_1426427" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:label="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_1426428"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_1426311" xlink:to="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_1426428" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ManagementFeePayable" xlink:label="loc_us-gaap_ManagementFeePayable_1426441"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_1426311" xlink:to="loc_us-gaap_ManagementFeePayable_1426441" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrentAndNoncurrent_1426442"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_1426311" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrentAndNoncurrent_1426442" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:label="loc_us-gaap_InterestPayableCurrentAndNoncurrent_1426444"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_1426311" xlink:to="loc_us-gaap_InterestPayableCurrentAndNoncurrent_1426444" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AdministrativeServicesPayable" xlink:label="loc_slrc_AdministrativeServicesPayable_1426447"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_1426311" xlink:to="loc_slrc_AdministrativeServicesPayable_1426447" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:label="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_1426448"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_1426311" xlink:to="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_1426448" use="optional" order="26"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_1426449"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_1426311" xlink:to="loc_us-gaap_Liabilities_1426449" use="optional" order="27"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_1426588"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1426269" xlink:to="loc_us-gaap_CommitmentsAndContingencies_1426588" use="optional" order="28"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_1426453"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1426269" xlink:to="loc_us-gaap_StockholdersEquityAbstract_1426453" use="optional" order="29"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_1426454"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_1426453" xlink:to="loc_us-gaap_CommonStockValue_1426454" use="optional" order="30"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_1426455"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_1426453" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_1426455" use="optional" order="31"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_1426456"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_1426453" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_1426456" use="optional" order="32"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsNet" xlink:label="loc_us-gaap_AssetsNet_1426458"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_1426453" xlink:to="loc_us-gaap_AssetsNet_1426458" use="optional" order="33"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetAssetValuePerShare" xlink:label="loc_us-gaap_NetAssetValuePerShare_1426459"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_1426453" xlink:to="loc_us-gaap_NetAssetValuePerShare_1426459" use="optional" order="34"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/ConsolidatedStatementsOfAssetsAndLiabilitiesParenthetical">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_1426476"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_1426473"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1426476" xlink:to="loc_us-gaap_StatementTable_1426473" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentHoldingsAxis" xlink:label="loc_slrc_InvestmentHoldingsAxis_1426492"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1426473" xlink:to="loc_slrc_InvestmentHoldingsAxis_1426492" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentHoldingsDomain" xlink:label="loc_slrc_InvestmentHoldingsDomain_1426494"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_slrc_InvestmentHoldingsAxis_1426492" xlink:to="loc_slrc_InvestmentHoldingsDomain_1426494" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentHoldingsDomain" xlink:label="loc_slrc_InvestmentHoldingsDomain_1426494_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_slrc_InvestmentHoldingsAxis_1426492" xlink:to="loc_slrc_InvestmentHoldingsDomain_1426494_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CompaniesLessThanFivePercentageOwnedMember" xlink:label="loc_slrc_CompaniesLessThanFivePercentageOwnedMember_1426500"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentHoldingsDomain_1426494" xlink:to="loc_slrc_CompaniesLessThanFivePercentageOwnedMember_1426500" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CompaniesMoreThanFivePercentageAndLessThanTwentyFivePercentageOwnedMember" xlink:label="loc_slrc_CompaniesMoreThanFivePercentageAndLessThanTwentyFivePercentageOwnedMember_1697994"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentHoldingsDomain_1426494" xlink:to="loc_slrc_CompaniesMoreThanFivePercentageAndLessThanTwentyFivePercentageOwnedMember_1697994" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CompaniesMoreThanTwentyFivePercentageOwnedMember" xlink:label="loc_slrc_CompaniesMoreThanTwentyFivePercentageOwnedMember_1426509"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentHoldingsDomain_1426494" xlink:to="loc_slrc_CompaniesMoreThanTwentyFivePercentageOwnedMember_1426509" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="loc_us-gaap_InvestmentOwnedAtCost_1426514"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1426476" xlink:to="loc_us-gaap_InvestmentOwnedAtCost_1426514" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CashEquivalentsAtCost" xlink:label="loc_slrc_CashEquivalentsAtCost_1426522"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1426476" xlink:to="loc_slrc_CashEquivalentsAtCost_1426522" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_1426523"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1426476" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_1426523" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredFinanceCostsGross" xlink:label="loc_us-gaap_DeferredFinanceCostsGross_1426524"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1426476" xlink:to="loc_us-gaap_DeferredFinanceCostsGross_1426524" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_1426525"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1426476" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_1426525" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_1426526"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1426476" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_1426526" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_1426529"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1426476" xlink:to="loc_us-gaap_CommonStockSharesIssued_1426529" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_1426534"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1426476" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_1426534" use="optional" order="15"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/ConsolidatedStatementsOfOperations">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_1427796"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_1427793"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1427796" xlink:to="loc_us-gaap_StatementTable_1427793" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentHoldingsAxis" xlink:label="loc_slrc_InvestmentHoldingsAxis_1427825"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1427793" xlink:to="loc_slrc_InvestmentHoldingsAxis_1427825" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentHoldingsDomain" xlink:label="loc_slrc_InvestmentHoldingsDomain_1427826"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_slrc_InvestmentHoldingsAxis_1427825" xlink:to="loc_slrc_InvestmentHoldingsDomain_1427826" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentHoldingsDomain" xlink:label="loc_slrc_InvestmentHoldingsDomain_1427826_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_slrc_InvestmentHoldingsAxis_1427825" xlink:to="loc_slrc_InvestmentHoldingsDomain_1427826_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CompaniesLessThanFivePercentageOwnedMember" xlink:label="loc_slrc_CompaniesLessThanFivePercentageOwnedMember_1427830"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentHoldingsDomain_1427826" xlink:to="loc_slrc_CompaniesLessThanFivePercentageOwnedMember_1427830" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CompaniesMoreThanFivePercentageAndLessThanTwentyFivePercentageOwnedMember" xlink:label="loc_slrc_CompaniesMoreThanFivePercentageAndLessThanTwentyFivePercentageOwnedMember_1697995"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentHoldingsDomain_1427826" xlink:to="loc_slrc_CompaniesMoreThanFivePercentageAndLessThanTwentyFivePercentageOwnedMember_1697995" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CompaniesMoreThanTwentyFivePercentageOwnedMember" xlink:label="loc_slrc_CompaniesMoreThanTwentyFivePercentageOwnedMember_1427831"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentHoldingsDomain_1427826" xlink:to="loc_slrc_CompaniesMoreThanTwentyFivePercentageOwnedMember_1427831" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_1427794"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1427793" xlink:to="loc_us-gaap_StatementClassOfStockAxis_1427794" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1427795"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1427794" xlink:to="loc_us-gaap_ClassOfStockDomain_1427795" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1427795_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1427794" xlink:to="loc_us-gaap_ClassOfStockDomain_1427795_default" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentIncomeAbstract" xlink:label="loc_slrc_InvestmentIncomeAbstract_1427805"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427796" xlink:to="loc_slrc_InvestmentIncomeAbstract_1427805" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_1427807"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentIncomeAbstract_1427805" xlink:to="loc_us-gaap_InvestmentIncomeInterest_1427807" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentIncomeDividend" xlink:label="loc_us-gaap_InvestmentIncomeDividend_1427810"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentIncomeAbstract_1427805" xlink:to="loc_us-gaap_InvestmentIncomeDividend_1427810" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoninterestIncome" xlink:label="loc_us-gaap_NoninterestIncome_1427813"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentIncomeAbstract_1427805" xlink:to="loc_us-gaap_NoninterestIncome_1427813" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GrossInvestmentIncomeOperating" xlink:label="loc_us-gaap_GrossInvestmentIncomeOperating_1427818"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentIncomeAbstract_1427805" xlink:to="loc_us-gaap_GrossInvestmentIncomeOperating_1427818" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ExpensesAbstract" xlink:label="loc_slrc_ExpensesAbstract_1433532"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427796" xlink:to="loc_slrc_ExpensesAbstract_1433532" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ManagementFeeExpense" xlink:label="loc_us-gaap_ManagementFeeExpense_1427840"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_ExpensesAbstract_1433532" xlink:to="loc_us-gaap_ManagementFeeExpense_1427840" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LaborAndRelatedExpense" xlink:label="loc_us-gaap_LaborAndRelatedExpense_1427844"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_ExpensesAbstract_1433532" xlink:to="loc_us-gaap_LaborAndRelatedExpense_1427844" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_1427853"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_ExpensesAbstract_1433532" xlink:to="loc_us-gaap_InterestExpense_1427853" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdministrativeFeesExpense" xlink:label="loc_us-gaap_AdministrativeFeesExpense_1427855"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_ExpensesAbstract_1433532" xlink:to="loc_us-gaap_AdministrativeFeesExpense_1427855" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_OtherGeneralAndAdministrativeExpense_1427856"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_ExpensesAbstract_1433532" xlink:to="loc_us-gaap_OtherGeneralAndAdministrativeExpense_1427856" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentIncomeInvestmentExpense" xlink:label="loc_us-gaap_InvestmentIncomeInvestmentExpense_1427857"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_ExpensesAbstract_1433532" xlink:to="loc_us-gaap_InvestmentIncomeInvestmentExpense_1427857" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyPerformanceBasedIncentiveFeesWaived" xlink:label="loc_slrc_InvestmentCompanyPerformanceBasedIncentiveFeesWaived_1569905"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_ExpensesAbstract_1433532" xlink:to="loc_slrc_InvestmentCompanyPerformanceBasedIncentiveFeesWaived_1569905" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement" xlink:label="loc_us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement_1569906"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_ExpensesAbstract_1433532" xlink:to="loc_us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement_1569906" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetInvestmentIncome" xlink:label="loc_us-gaap_NetInvestmentIncome_1693692"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427796" xlink:to="loc_us-gaap_NetInvestmentIncome_1693692" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrencyAbstract" xlink:label="loc_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrencyAbstract_1427866"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427796" xlink:to="loc_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrencyAbstract_1427866" use="optional" order="26"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_NetRealizedGainLossOnInvestmentsAndCashEquivalentsAbstract" xlink:label="loc_slrc_NetRealizedGainLossOnInvestmentsAndCashEquivalentsAbstract_1699036"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrencyAbstract_1427866" xlink:to="loc_slrc_NetRealizedGainLossOnInvestmentsAndCashEquivalentsAbstract_1699036" use="optional" order="27"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="loc_us-gaap_RealizedInvestmentGainsLosses_1427867"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_NetRealizedGainLossOnInvestmentsAndCashEquivalentsAbstract_1699036" xlink:to="loc_us-gaap_RealizedInvestmentGainsLosses_1427867" use="optional" order="28"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ChangeInUnrealizedGainLossOnInvestmentsAndCashEquivalentsAbstract" xlink:label="loc_slrc_ChangeInUnrealizedGainLossOnInvestmentsAndCashEquivalentsAbstract_1427871"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrencyAbstract_1427866" xlink:to="loc_slrc_ChangeInUnrealizedGainLossOnInvestmentsAndCashEquivalentsAbstract_1427871" use="optional" order="29"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments_1427889"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_ChangeInUnrealizedGainLossOnInvestmentsAndCashEquivalentsAbstract_1427871" xlink:to="loc_us-gaap_UnrealizedGainLossOnInvestments_1427889" use="optional" order="30"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency" xlink:label="loc_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency_1427922"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrencyAbstract_1427866" xlink:to="loc_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency_1427922" use="optional" order="31"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_1427927"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427796" xlink:to="loc_us-gaap_ProfitLoss_1427927" use="optional" order="32"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_1570592"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427796" xlink:to="loc_us-gaap_EarningsPerShareBasic_1570592" use="optional" order="33"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_1570593"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427796" xlink:to="loc_us-gaap_EarningsPerShareDiluted_1570593" use="optional" order="34"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/ConsolidatedStatementsOfChangesInNetAssets">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_1427743"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_1427740"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1427743" xlink:to="loc_us-gaap_StatementTable_1427740" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLossAttributableToReportingEntityAbstract" xlink:label="loc_us-gaap_NetIncomeLossAttributableToReportingEntityAbstract_1427744"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427743" xlink:to="loc_us-gaap_NetIncomeLossAttributableToReportingEntityAbstract_1427744" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentIncomeNet" xlink:label="loc_us-gaap_InvestmentIncomeNet_1427745"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAttributableToReportingEntityAbstract_1427744" xlink:to="loc_us-gaap_InvestmentIncomeNet_1427745" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="loc_us-gaap_RealizedInvestmentGainsLosses_1427748"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAttributableToReportingEntityAbstract_1427744" xlink:to="loc_us-gaap_RealizedInvestmentGainsLosses_1427748" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments_1427750"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAttributableToReportingEntityAbstract_1427744" xlink:to="loc_us-gaap_UnrealizedGainLossOnInvestments_1427750" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_1427751"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAttributableToReportingEntityAbstract_1427744" xlink:to="loc_us-gaap_ProfitLoss_1427751" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyDistributionToShareholdersAbstract" xlink:label="loc_us-gaap_InvestmentCompanyDistributionToShareholdersAbstract_1427752"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427743" xlink:to="loc_us-gaap_InvestmentCompanyDistributionToShareholdersAbstract_1427752" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyEarningsDistribution" xlink:label="loc_slrc_InvestmentCompanyEarningsDistribution_1697724"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentCompanyDistributionToShareholdersAbstract_1427752" xlink:to="loc_slrc_InvestmentCompanyEarningsDistribution_1697724" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyReturnOfCapitalDistribution" xlink:label="loc_slrc_InvestmentCompanyReturnOfCapitalDistribution_1697242"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentCompanyDistributionToShareholdersAbstract_1427752" xlink:to="loc_slrc_InvestmentCompanyReturnOfCapitalDistribution_1697242" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyDividendDistribution" xlink:label="loc_us-gaap_InvestmentCompanyDividendDistribution_1427754"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentCompanyDistributionToShareholdersAbstract_1427752" xlink:to="loc_us-gaap_InvestmentCompanyDividendDistribution_1427754" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract" xlink:label="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_1427757"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427743" xlink:to="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_1427757" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_1427759"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_1427757" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_1427759" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_1336"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_1427757" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_1336" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyNetIncreaseInNetAssetsResultingFromCapitalTransactions" xlink:label="loc_slrc_InvestmentCompanyNetIncreaseInNetAssetsResultingFromCapitalTransactions_1337"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_1427757" xlink:to="loc_slrc_InvestmentCompanyNetIncreaseInNetAssetsResultingFromCapitalTransactions_1337" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyIncreaseDecreaseInNetAssets" xlink:label="loc_slrc_InvestmentCompanyIncreaseDecreaseInNetAssets_1427764"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427743" xlink:to="loc_slrc_InvestmentCompanyIncreaseDecreaseInNetAssets_1427764" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsNet" xlink:label="loc_us-gaap_AssetsNet_1427771"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427743" xlink:to="loc_us-gaap_AssetsNet_1427771" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract" xlink:label="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract_1427779"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427743" xlink:to="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract_1427779" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_1427782"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract_1427779" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_1427782" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_1338"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract_1427779" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_1338" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease_1339"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract_1427779" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease_1339" use="optional" order="20"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/ConsolidatedStatementsOfCashFlows">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_1427804"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_1427801"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1427804" xlink:to="loc_us-gaap_StatementTable_1427801" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_1427802"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1427801" xlink:to="loc_us-gaap_StatementClassOfStockAxis_1427802" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1427803"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1427802" xlink:to="loc_us-gaap_ClassOfStockDomain_1427803" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1427803_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1427802" xlink:to="loc_us-gaap_ClassOfStockDomain_1427803_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_1427806"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427804" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_1427806" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_1699052"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_1427806" xlink:to="loc_us-gaap_NetIncomeLoss_1699052" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_1427812"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_1427806" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_1427812" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="loc_us-gaap_RealizedInvestmentGainsLosses_1427816"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_1427812" xlink:to="loc_us-gaap_RealizedInvestmentGainsLosses_1427816" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments_1427821"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_1427812" xlink:to="loc_us-gaap_UnrealizedGainLossOnInvestments_1427821" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_1428046"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_1427812" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_1428046" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInOperatingAssetsAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_1427823"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_1427806" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_1427823" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_IncreaseDecreaseInPaymentsToAcquireInvestments" xlink:label="loc_slrc_IncreaseDecreaseInPaymentsToAcquireInvestments_1427835"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_1427823" xlink:to="loc_slrc_IncreaseDecreaseInPaymentsToAcquireInvestments_1427835" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity" xlink:label="loc_us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity_1427841"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_1427823" xlink:to="loc_us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity_1427841" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_IncreaseDecreaseInInvestmentIncomeAmortizationOfDiscount" xlink:label="loc_slrc_IncreaseDecreaseInInvestmentIncomeAmortizationOfDiscount_1427852"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_1427823" xlink:to="loc_slrc_IncreaseDecreaseInInvestmentIncomeAmortizationOfDiscount_1427852" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CapitalizationOfPaymentInKindIncome" xlink:label="loc_slrc_CapitalizationOfPaymentInKindIncome_1427845"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_1427823" xlink:to="loc_slrc_CapitalizationOfPaymentInKindIncome_1427845" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CollectionsOfPaymentInKindIncome" xlink:label="loc_slrc_CollectionsOfPaymentInKindIncome_1427868"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_1427823" xlink:to="loc_slrc_CollectionsOfPaymentInKindIncome_1427868" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_IncreaseDecreaseReceivableForInvestmentsSold" xlink:label="loc_slrc_IncreaseDecreaseReceivableForInvestmentsSold_1433837"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_1427823" xlink:to="loc_slrc_IncreaseDecreaseReceivableForInvestmentsSold_1433837" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_1427874"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_1427823" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_1427874" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInDividendsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInDividendsReceivable_1427877"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_1427823" xlink:to="loc_us-gaap_IncreaseDecreaseInDividendsReceivable_1427877" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_1427880"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_1427823" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_1427880" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CashAndOtherAssetsAcquiredInMerger" xlink:label="loc_slrc_CashAndOtherAssetsAcquiredInMerger_1340"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_1427823" xlink:to="loc_slrc_CashAndOtherAssetsAcquiredInMerger_1340" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_1427910"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_1427806" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_1427910" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInPayableForInvestmentPurchased" xlink:label="loc_us-gaap_IncreaseDecreaseInPayableForInvestmentPurchased_1427917"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_1427910" xlink:to="loc_us-gaap_IncreaseDecreaseInPayableForInvestmentPurchased_1427917" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInManagementFeePayable" xlink:label="loc_us-gaap_IncreaseDecreaseInManagementFeePayable_1699051"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_1427910" xlink:to="loc_us-gaap_IncreaseDecreaseInManagementFeePayable_1699051" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInIncentiveFeePayable" xlink:label="loc_us-gaap_IncreaseDecreaseInIncentiveFeePayable_1427923"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_1427910" xlink:to="loc_us-gaap_IncreaseDecreaseInIncentiveFeePayable_1427923" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_IncreaseDecreaseInAdministrativeServicesExpensePayable" xlink:label="loc_slrc_IncreaseDecreaseInAdministrativeServicesExpensePayable_1428038"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_1427910" xlink:to="loc_slrc_IncreaseDecreaseInAdministrativeServicesExpensePayable_1428038" use="optional" order="26"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:label="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_1428040"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_1427910" xlink:to="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_1428040" use="optional" order="27"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_1428043"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_1427910" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_1428043" use="optional" order="28"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1697985"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_1427806" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1697985" use="optional" order="29"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_1433693"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427804" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_1433693" use="optional" order="30"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsOfDistributionsToAffiliates" xlink:label="loc_us-gaap_PaymentsOfDistributionsToAffiliates_1428053"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_1433693" xlink:to="loc_us-gaap_PaymentsOfDistributionsToAffiliates_1428053" use="optional" order="31"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromIssuanceOfUnsecuredDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfUnsecuredDebt_1428054"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_1433693" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfUnsecuredDebt_1428054" use="optional" order="32"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RepaymentsOfUnsecuredDebt" xlink:label="loc_us-gaap_RepaymentsOfUnsecuredDebt_1569913"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_1433693" xlink:to="loc_us-gaap_RepaymentsOfUnsecuredDebt_1569913" use="optional" order="33"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromIssuanceOfSecuredDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSecuredDebt_1428057"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_1433693" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSecuredDebt_1428057" use="optional" order="34"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RepaymentsOfSecuredDebt" xlink:label="loc_us-gaap_RepaymentsOfSecuredDebt_1428058"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_1433693" xlink:to="loc_us-gaap_RepaymentsOfSecuredDebt_1428058" use="optional" order="35"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_1341"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_1433693" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_1341" use="optional" order="36"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_1428085"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_1433693" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_1428085" use="optional" order="37"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_1428088"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427804" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_1428088" use="optional" order="38"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1428096"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427804" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1428096" use="optional" order="39"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_1428104"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1427804" xlink:to="loc_us-gaap_SupplementalCashFlowInformationAbstract_1428104" use="optional" order="40"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_1428109"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_1428104" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_1428109" use="optional" order="41"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssued1" xlink:label="loc_us-gaap_StockIssued1_1569914"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_1428104" xlink:to="loc_us-gaap_StockIssued1_1569914" use="optional" order="42"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/ConsolidatedScheduleOfInvestments">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_1698000"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_1698000" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentIdentifierAxis" xlink:label="loc_us-gaap_InvestmentIdentifierAxis_1698001"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_1698000" xlink:to="loc_us-gaap_InvestmentIdentifierAxis_1698001" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_1698188"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_1698000" xlink:to="loc_srt_RangeAxis_1698188" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1698189"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1698188" xlink:to="loc_srt_RangeMember_1698189" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1698189_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1698188" xlink:to="loc_srt_RangeMember_1698189_default" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_1698191"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1698189" xlink:to="loc_srt_MinimumMember_1698191" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_1698190"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1698189" xlink:to="loc_srt_MaximumMember_1698190" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1698219"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_1698000" xlink:to="loc_dei_LegalEntityAxis_1698219" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1698220"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1698219" xlink:to="loc_dei_EntityDomain_1698220" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1698220_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1698219" xlink:to="loc_dei_EntityDomain_1698220_default" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeAxis" xlink:label="loc_us-gaap_InvestmentTypeAxis_1698222"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_1698000" xlink:to="loc_us-gaap_InvestmentTypeAxis_1698222" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_1698223"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_1698222" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_1698223_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_1698222" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_1698223_default" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_DiversifiedFinancialServicesMember" xlink:label="loc_slrc_DiversifiedFinancialServicesMember_1698759"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_DiversifiedFinancialServicesMember_1698759" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MultiSectorHoldingsMember" xlink:label="loc_slrc_MultiSectorHoldingsMember_1698762"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_MultiSectorHoldingsMember_1698762" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_HealthCareProvidersAndServicesMember" xlink:label="loc_slrc_HealthCareProvidersAndServicesMember_1698764"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_HealthCareProvidersAndServicesMember_1698764" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_HealthCareEquipmentAndSuppliesMember" xlink:label="loc_slrc_HealthCareEquipmentAndSuppliesMember_1698767"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_HealthCareEquipmentAndSuppliesMember_1698767" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PharmaceuticalsMember" xlink:label="loc_slrc_PharmaceuticalsMember_1698769"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_PharmaceuticalsMember_1698769" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_BiotechnologyMember" xlink:label="loc_slrc_BiotechnologyMember_1698772"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_BiotechnologyMember_1698772" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SoftwareMember" xlink:label="loc_slrc_SoftwareMember_1698775"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_SoftwareMember_1698775" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InsuranceMember" xlink:label="loc_slrc_InsuranceMember_1698776"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_InsuranceMember_1698776" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_DiversifiedConsumerServicesMember" xlink:label="loc_slrc_DiversifiedConsumerServicesMember_1698777"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_DiversifiedConsumerServicesMember_1698777" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CommercialServicesAndSuppliesMember" xlink:label="loc_slrc_CommercialServicesAndSuppliesMember_1698778"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_CommercialServicesAndSuppliesMember_1698778" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetManagement1Member" xlink:label="loc_us-gaap_AssetManagement1Member_1698783"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_us-gaap_AssetManagement1Member_1698783" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CapitalMarketsMember" xlink:label="loc_slrc_CapitalMarketsMember_1698784"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_CapitalMarketsMember_1698784" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MediaMember" xlink:label="loc_slrc_MediaMember_1698785"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_MediaMember_1698785" use="optional" order="26"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ThriftsAndMortgageFinanceMember" xlink:label="loc_slrc_ThriftsAndMortgageFinanceMember_1698787"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_ThriftsAndMortgageFinanceMember_1698787" use="optional" order="27"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PersonalProductsMember" xlink:label="loc_slrc_PersonalProductsMember_1698789"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_PersonalProductsMember_1698789" use="optional" order="28"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PackagedFoodsAndMeatsMember" xlink:label="loc_slrc_PackagedFoodsAndMeatsMember_1698791"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_PackagedFoodsAndMeatsMember_1698791" use="optional" order="29"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AutoPartsAndEquipmentMember" xlink:label="loc_slrc_AutoPartsAndEquipmentMember_1698793"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_AutoPartsAndEquipmentMember_1698793" use="optional" order="30"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_RoadAndRailMember" xlink:label="loc_slrc_RoadAndRailMember_1698794"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_RoadAndRailMember_1698794" use="optional" order="31"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LifeSciencesToolsAndServicesMember" xlink:label="loc_slrc_LifeSciencesToolsAndServicesMember_1698796"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_LifeSciencesToolsAndServicesMember_1698796" use="optional" order="32"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InternetSoftwareAndServicesMember" xlink:label="loc_slrc_InternetSoftwareAndServicesMember_1698797"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_InternetSoftwareAndServicesMember_1698797" use="optional" order="33"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InternetAndCatalogRetailMember" xlink:label="loc_slrc_InternetAndCatalogRetailMember_1698799"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_InternetAndCatalogRetailMember_1698799" use="optional" order="34"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TransportationInfrastructureMember" xlink:label="loc_slrc_TransportationInfrastructureMember_1698801"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_TransportationInfrastructureMember_1698801" use="optional" order="35"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CommunicationsEquipmentMember" xlink:label="loc_slrc_CommunicationsEquipmentMember_1698802"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_CommunicationsEquipmentMember_1698802" use="optional" order="36"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_HealthCareTechnologyMember" xlink:label="loc_slrc_HealthCareTechnologyMember_1698803"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_HealthCareTechnologyMember_1698803" use="optional" order="37"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TradingCompaniesAndDistributorsMember" xlink:label="loc_slrc_TradingCompaniesAndDistributorsMember_1698805"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_TradingCompaniesAndDistributorsMember_1698805" use="optional" order="38"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_HotelsRestaurantsAndLeisureMember" xlink:label="loc_slrc_HotelsRestaurantsAndLeisureMember_1698808"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_HotelsRestaurantsAndLeisureMember_1698808" use="optional" order="39"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AerospaceAndDefenseMember" xlink:label="loc_slrc_AerospaceAndDefenseMember_1698809"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_AerospaceAndDefenseMember_1698809" use="optional" order="40"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_OilGasAndConsumableFuelsMember" xlink:label="loc_slrc_OilGasAndConsumableFuelsMember_1698810"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_OilGasAndConsumableFuelsMember_1698810" use="optional" order="41"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_FootwearMember" xlink:label="loc_slrc_FootwearMember_1698811"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_FootwearMember_1698811" use="optional" order="42"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AutoComponentsMember" xlink:label="loc_slrc_AutoComponentsMember_1698812"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_AutoComponentsMember_1698812" use="optional" order="43"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ItServicesMember" xlink:label="loc_slrc_ItServicesMember_1698813"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_ItServicesMember_1698813" use="optional" order="44"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_FoodProductsMember" xlink:label="loc_slrc_FoodProductsMember_1698814"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_FoodProductsMember_1698814" use="optional" order="45"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MachineryMember" xlink:label="loc_slrc_MachineryMember_1698815"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_MachineryMember_1698815" use="optional" order="46"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AirlinesMember" xlink:label="loc_slrc_AirlinesMember_1698816"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_AirlinesMember_1698816" use="optional" order="47"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_DistributorsMember" xlink:label="loc_slrc_DistributorsMember_1698817"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_DistributorsMember_1698817" use="optional" order="48"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MetalsAndMiningMember" xlink:label="loc_slrc_MetalsAndMiningMember_1698818"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_MetalsAndMiningMember_1698818" use="optional" order="49"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LeisureEquipmentAndProductsMember" xlink:label="loc_slrc_LeisureEquipmentAndProductsMember_1698819"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_LeisureEquipmentAndProductsMember_1698819" use="optional" order="50"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SpecialtyRetailMember" xlink:label="loc_slrc_SpecialtyRetailMember_1698820"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_SpecialtyRetailMember_1698820" use="optional" order="51"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_FoodAndStaplesRetailingMember" xlink:label="loc_slrc_FoodAndStaplesRetailingMember_1698822"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_FoodAndStaplesRetailingMember_1698822" use="optional" order="52"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ConstructionAndEngineeringMember" xlink:label="loc_slrc_ConstructionAndEngineeringMember_1698823"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_ConstructionAndEngineeringMember_1698823" use="optional" order="53"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ConsumerFinanceMember" xlink:label="loc_slrc_ConsumerFinanceMember_1698824"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_ConsumerFinanceMember_1698824" use="optional" order="54"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_EnergyEquipmentAndServicesMember" xlink:label="loc_slrc_EnergyEquipmentAndServicesMember_1698825"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_EnergyEquipmentAndServicesMember_1698825" use="optional" order="55"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_WaterUtilitiesMember" xlink:label="loc_slrc_WaterUtilitiesMember_1698826"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_WaterUtilitiesMember_1698826" use="optional" order="56"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_WirelessTelecommunicationServicesMember" xlink:label="loc_slrc_WirelessTelecommunicationServicesMember_1698836"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_WirelessTelecommunicationServicesMember_1698836" use="optional" order="57"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_BuildingProductsMember" xlink:label="loc_slrc_BuildingProductsMember_1698839"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_BuildingProductsMember_1698839" use="optional" order="58"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ContainersAndPackagingMember" xlink:label="loc_slrc_ContainersAndPackagingMember_1698843"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_ContainersAndPackagingMember_1698843" use="optional" order="59"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesByIndustryAxis" xlink:label="loc_us-gaap_EquitySecuritiesByIndustryAxis_1698272"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_1698000" xlink:to="loc_us-gaap_EquitySecuritiesByIndustryAxis_1698272" use="optional" order="60"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember_1698273"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquitySecuritiesByIndustryAxis_1698272" xlink:to="loc_us-gaap_EquitySecuritiesIndustryMember_1698273" use="optional" order="61"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember_1698273_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquitySecuritiesByIndustryAxis_1698272" xlink:to="loc_us-gaap_EquitySecuritiesIndustryMember_1698273_default" use="optional" order="62"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentsOwnedIndustryName" xlink:label="loc_slrc_InvestmentsOwnedIndustryName_1698003"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_slrc_InvestmentsOwnedIndustryName_1698003" use="optional" order="63"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentBasisSpreadVariableRate" xlink:label="loc_us-gaap_InvestmentBasisSpreadVariableRate_1698004"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentBasisSpreadVariableRate_1698004" use="optional" order="64"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentInterestRateFloor" xlink:label="loc_us-gaap_InvestmentInterestRateFloor_1698005"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentInterestRateFloor_1698005" use="optional" order="65"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentInterestRate" xlink:label="loc_us-gaap_InvestmentInterestRate_1698007"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentInterestRate_1698007" use="optional" order="66"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentMaturityDate" xlink:label="loc_us-gaap_InvestmentMaturityDate_1698009"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentMaturityDate_1698009" use="optional" order="67"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:label="loc_us-gaap_InvestmentOwnedBalancePrincipalAmount_1698010"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentOwnedBalancePrincipalAmount_1698010" use="optional" order="68"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedBalanceShares" xlink:label="loc_us-gaap_InvestmentOwnedBalanceShares_1698011"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentOwnedBalanceShares_1698011" use="optional" order="69"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="loc_us-gaap_InvestmentOwnedAtCost_1698012"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentOwnedAtCost_1698012" use="optional" order="70"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentAcquisitionDate" xlink:label="loc_us-gaap_InvestmentAcquisitionDate_1698896"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentAcquisitionDate_1698896" use="optional" order="71"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="loc_us-gaap_InvestmentOwnedAtFairValue_1698774"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentOwnedAtFairValue_1698774" use="optional" order="72"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:label="loc_us-gaap_InvestmentOwnedPercentOfNetAssets_1698745"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentOwnedPercentOfNetAssets_1698745" use="optional" order="73"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/ConsolidatedScheduleOfInvestmentsParenthetical">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_1433944"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_1433941"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_us-gaap_StatementTable_1433941" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentHoldingsAxis" xlink:label="loc_slrc_InvestmentHoldingsAxis_1434081"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1433941" xlink:to="loc_slrc_InvestmentHoldingsAxis_1434081" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentHoldingsDomain" xlink:label="loc_slrc_InvestmentHoldingsDomain_1434082"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_slrc_InvestmentHoldingsAxis_1434081" xlink:to="loc_slrc_InvestmentHoldingsDomain_1434082" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentHoldingsDomain" xlink:label="loc_slrc_InvestmentHoldingsDomain_1434082_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_slrc_InvestmentHoldingsAxis_1434081" xlink:to="loc_slrc_InvestmentHoldingsDomain_1434082_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CompaniesMoreThanTwentyFivePercentageOwnedMember" xlink:label="loc_slrc_CompaniesMoreThanTwentyFivePercentageOwnedMember_1434083"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentHoldingsDomain_1434082" xlink:to="loc_slrc_CompaniesMoreThanTwentyFivePercentageOwnedMember_1434083" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CompaniesMoreThanFivePercentageLessThanTwentyFivePercentageOwnedMember" xlink:label="loc_slrc_CompaniesMoreThanFivePercentageLessThanTwentyFivePercentageOwnedMember_1699005"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentHoldingsDomain_1434082" xlink:to="loc_slrc_CompaniesMoreThanFivePercentageLessThanTwentyFivePercentageOwnedMember_1699005" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1433942"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1433941" xlink:to="loc_dei_LegalEntityAxis_1433942" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1433943"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1433942" xlink:to="loc_dei_EntityDomain_1433943" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1433943_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1433942" xlink:to="loc_dei_EntityDomain_1433943_default" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_EquipmentOperatingLeasesLlcMember" xlink:label="loc_slrc_EquipmentOperatingLeasesLlcMember_1434064"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_EquipmentOperatingLeasesLlcMember_1434064" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_KingsbridgeHoldingsLlcMember" xlink:label="loc_slrc_KingsbridgeHoldingsLlcMember_1434065"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_KingsbridgeHoldingsLlcMember_1434065" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_KbhTopcoLlcKingsbridgeMember" xlink:label="loc_slrc_KbhTopcoLlcKingsbridgeMember_1434066"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_KbhTopcoLlcKingsbridgeMember_1434066" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LoyerCapitalLlcMember" xlink:label="loc_slrc_LoyerCapitalLlcMember_1434067"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_LoyerCapitalLlcMember_1434067" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_RdHoldcoIncCommonEquityMember" xlink:label="loc_slrc_RdHoldcoIncCommonEquityMember_1434098"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_RdHoldcoIncCommonEquityMember_1434098" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_RdHoldcoIncClassBMember" xlink:label="loc_slrc_RdHoldcoIncClassBMember_1434099"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_RdHoldcoIncClassBMember_1434099" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_RdHoldcoIncWarrantsMember" xlink:label="loc_slrc_RdHoldcoIncWarrantsMember_1434100"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_RdHoldcoIncWarrantsMember_1434100" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_RdHoldcoIncDebtMember" xlink:label="loc_slrc_RdHoldcoIncDebtMember_1696904"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_RdHoldcoIncDebtMember_1696904" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrBusinessCreditMember" xlink:label="loc_slrc_SlrBusinessCreditMember_1570121"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_SlrBusinessCreditMember_1570121" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrCreditSolutionsMember" xlink:label="loc_slrc_SlrCreditSolutionsMember_1434070"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_SlrCreditSolutionsMember_1434070" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrEquipmentFinanceEquityMember" xlink:label="loc_slrc_SlrEquipmentFinanceEquityMember_1434101"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_SlrEquipmentFinanceEquityMember_1434101" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrEquipmentFinanceDebtMember" xlink:label="loc_slrc_SlrEquipmentFinanceDebtMember_1434102"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_SlrEquipmentFinanceDebtMember_1434102" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrHealthcareAblMember" xlink:label="loc_slrc_SlrHealthcareAblMember_1570122"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_SlrHealthcareAblMember_1570122" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrSeniorLendingProgramLlcMember" xlink:label="loc_slrc_SlrSeniorLendingProgramLlcMember_1697966"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_SlrSeniorLendingProgramLlcMember_1697966" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SoaggLlcMember" xlink:label="loc_slrc_SoaggLlcMember_1434072"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_SoaggLlcMember_1434072" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SointLlcMember" xlink:label="loc_slrc_SointLlcMember_1434075"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_SointLlcMember_1434075" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AmerimarkMember" xlink:label="loc_slrc_AmerimarkMember_1697938"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_AmerimarkMember_1697938" use="optional" order="26"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_BridgeBioPharmaIncMember" xlink:label="loc_slrc_BridgeBioPharmaIncMember_1697939"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_BridgeBioPharmaIncMember_1697939" use="optional" order="27"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_OmniGuideHoldingsIncMember" xlink:label="loc_slrc_OmniGuideHoldingsIncMember_1697940"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_OmniGuideHoldingsIncMember_1697940" use="optional" order="28"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_VapothermInc.Member" xlink:label="loc_slrc_VapothermInc.Member_1697941"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_VapothermInc.Member_1697941" use="optional" order="29"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_IcimsInc.Member" xlink:label="loc_slrc_IcimsInc.Member_1697942"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_IcimsInc.Member_1697942" use="optional" order="30"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_KaseyaIncMember" xlink:label="loc_slrc_KaseyaIncMember_1698911"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_KaseyaIncMember_1698911" use="optional" order="31"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ASCHoldcoLLCMember" xlink:label="loc_slrc_ASCHoldcoLLCMember_1698931"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_ASCHoldcoLLCMember_1698931" use="optional" order="32"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AmerimarkIntermediateHoldingsLlcMember" xlink:label="loc_slrc_AmerimarkIntermediateHoldingsLlcMember_1698933"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_AmerimarkIntermediateHoldingsLlcMember_1698933" use="optional" order="33"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AmeriMarkIntermediateHoldingsOneLLCMember" xlink:label="loc_slrc_AmeriMarkIntermediateHoldingsOneLLCMember_1698934"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_AmeriMarkIntermediateHoldingsOneLLCMember_1698934" use="optional" order="34"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_BaysideOpcoLLCMember" xlink:label="loc_slrc_BaysideOpcoLLCMember_1698935"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_BaysideOpcoLLCMember_1698935" use="optional" order="35"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_BaysideOpcoLLCOneMember" xlink:label="loc_slrc_BaysideOpcoLLCOneMember_1698936"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_BaysideOpcoLLCOneMember_1698936" use="optional" order="36"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_BaysideParentLlcLoanMember" xlink:label="loc_slrc_BaysideParentLlcLoanMember_1698937"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_BaysideParentLlcLoanMember_1698937" use="optional" order="37"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_BaysideParentLLCEquityMember" xlink:label="loc_slrc_BaysideParentLLCEquityMember_1698950"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_BaysideParentLLCEquityMember_1698950" use="optional" order="38"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlramiTopcoBlockerLlcMember" xlink:label="loc_slrc_SlramiTopcoBlockerLlcMember_1698938"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433943" xlink:to="loc_slrc_SlramiTopcoBlockerLlcMember_1698938" use="optional" order="39"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SpreadAxis" xlink:label="loc_slrc_SpreadAxis_1437406"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1433941" xlink:to="loc_slrc_SpreadAxis_1437406" use="optional" order="40"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SpreadDomain" xlink:label="loc_slrc_SpreadDomain_1437407"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_slrc_SpreadAxis_1437406" xlink:to="loc_slrc_SpreadDomain_1437407" use="optional" order="41"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SpreadDomain" xlink:label="loc_slrc_SpreadDomain_1437407_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_slrc_SpreadAxis_1437406" xlink:to="loc_slrc_SpreadDomain_1437407_default" use="optional" order="42"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SpreadOneMember" xlink:label="loc_slrc_SpreadOneMember_1437408"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_SpreadDomain_1437407" xlink:to="loc_slrc_SpreadOneMember_1437408" use="optional" order="43"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageRepresentingSeniorSecuredLoansInInvestmentsOwned" xlink:label="loc_slrc_PercentageRepresentingSeniorSecuredLoansInInvestmentsOwned_1432703"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_slrc_PercentageRepresentingSeniorSecuredLoansInInvestmentsOwned_1432703" use="optional" order="44"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageRepresentingEquipmentFinancingInInvestmentsOwned" xlink:label="loc_slrc_PercentageRepresentingEquipmentFinancingInInvestmentsOwned_1432704"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_slrc_PercentageRepresentingEquipmentFinancingInInvestmentsOwned_1432704" use="optional" order="45"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageRepresentingPreferredEquityInInvestmentsOwned" xlink:label="loc_slrc_PercentageRepresentingPreferredEquityInInvestmentsOwned_1432705"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_slrc_PercentageRepresentingPreferredEquityInInvestmentsOwned_1432705" use="optional" order="46"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageRepresentingCommonEquityOrEquityInterestsOrWarrantsOwned" xlink:label="loc_slrc_PercentageRepresentingCommonEquityOrEquityInterestsOrWarrantsOwned_1432851"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_slrc_PercentageRepresentingCommonEquityOrEquityInterestsOrWarrantsOwned_1432851" use="optional" order="47"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageRepresentingTotalInvestmentsInInvestmentsOwned" xlink:label="loc_slrc_PercentageRepresentingTotalInvestmentsInInvestmentsOwned_1432708"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_slrc_PercentageRepresentingTotalInvestmentsInInvestmentsOwned_1432708" use="optional" order="48"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageRepresentingCashEquivalentsInInvestmentsOwned" xlink:label="loc_slrc_PercentageRepresentingCashEquivalentsInInvestmentsOwned_1432733"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_slrc_PercentageRepresentingCashEquivalentsInInvestmentsOwned_1432733" use="optional" order="49"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:label="loc_us-gaap_InvestmentOwnedPercentOfNetAssets_1698827"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_us-gaap_InvestmentOwnedPercentOfNetAssets_1698827" use="optional" order="50"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageRepresentingTotalInvestmentsAndCashEquivalentsInInvestmentsOwned" xlink:label="loc_slrc_PercentageRepresentingTotalInvestmentsAndCashEquivalentsInInvestmentsOwned_1432741"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_slrc_PercentageRepresentingTotalInvestmentsAndCashEquivalentsInInvestmentsOwned_1432741" use="optional" order="51"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageRepresentingLiabilitiesInExcessOfOtherAssetsInInvestmentsOwned" xlink:label="loc_slrc_PercentageRepresentingLiabilitiesInExcessOfOtherAssetsInInvestmentsOwned_1432742"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_slrc_PercentageRepresentingLiabilitiesInExcessOfOtherAssetsInInvestmentsOwned_1432742" use="optional" order="52"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageOfOutstandingVotingSecuritiesOfTheInvestment" xlink:label="loc_slrc_PercentageOfOutstandingVotingSecuritiesOfTheInvestment_1432746"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_slrc_PercentageOfOutstandingVotingSecuritiesOfTheInvestment_1432746" use="optional" order="53"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageOfNonQualifyingAssetsInThePortfolioOfTotalAssets" xlink:label="loc_slrc_PercentageOfNonQualifyingAssetsInThePortfolioOfTotalAssets_1432750"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_slrc_PercentageOfNonQualifyingAssetsInThePortfolioOfTotalAssets_1432750" use="optional" order="54"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:label="loc_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_1432752"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_1432752" use="optional" order="55"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" xlink:label="loc_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation_1432754"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation_1432754" use="optional" order="56"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation" xlink:label="loc_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation_1432755"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation_1432755" use="optional" order="57"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" xlink:label="loc_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes_1432759"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes_1432759" use="optional" order="58"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageSpreadAsCash" xlink:label="loc_slrc_PercentageSpreadAsCash_1432766"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_slrc_PercentageSpreadAsCash_1432766" use="optional" order="59"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageSpreadAsPaidInKind" xlink:label="loc_slrc_PercentageSpreadAsPaidInKind_1432767"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_slrc_PercentageSpreadAsPaidInKind_1432767" use="optional" order="60"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentInterestRatePaidInKind" xlink:label="loc_us-gaap_InvestmentInterestRatePaidInKind_1697943"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_us-gaap_InvestmentInterestRatePaidInKind_1697943" use="optional" order="61"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyPercentageOfHolding" xlink:label="loc_slrc_InvestmentCompanyPercentageOfHolding_1698930"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_slrc_InvestmentCompanyPercentageOfHolding_1698930" use="optional" order="62"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyNetAssetsFromOperationIncreaseDecreaseAbstract" xlink:label="loc_slrc_InvestmentCompanyNetAssetsFromOperationIncreaseDecreaseAbstract_1433946"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433944" xlink:to="loc_slrc_InvestmentCompanyNetAssetsFromOperationIncreaseDecreaseAbstract_1433946" use="optional" order="63"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="loc_us-gaap_InvestmentOwnedAtFairValue_1433947"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentCompanyNetAssetsFromOperationIncreaseDecreaseAbstract_1433946" xlink:to="loc_us-gaap_InvestmentOwnedAtFairValue_1433947" use="optional" order="64"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentOwnedUnrecognizedUnrealizedAdditions" xlink:label="loc_slrc_InvestmentOwnedUnrecognizedUnrealizedAdditions_1434092"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentCompanyNetAssetsFromOperationIncreaseDecreaseAbstract_1433946" xlink:to="loc_slrc_InvestmentOwnedUnrecognizedUnrealizedAdditions_1434092" use="optional" order="65"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentOwnedUnrecognizedUnrealizedReductions" xlink:label="loc_slrc_InvestmentOwnedUnrecognizedUnrealizedReductions_1434094"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentCompanyNetAssetsFromOperationIncreaseDecreaseAbstract_1433946" xlink:to="loc_slrc_InvestmentOwnedUnrecognizedUnrealizedReductions_1434094" use="optional" order="66"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtAndEquitySecuritiesRealizedGainLoss" xlink:label="loc_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss_1433951"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentCompanyNetAssetsFromOperationIncreaseDecreaseAbstract_1433946" xlink:to="loc_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss_1433951" use="optional" order="67"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" xlink:label="loc_us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_1433953"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentCompanyNetAssetsFromOperationIncreaseDecreaseAbstract_1433946" xlink:to="loc_us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_1433953" use="optional" order="68"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentOwnedInterestAndDividendIncome" xlink:label="loc_slrc_InvestmentOwnedInterestAndDividendIncome_1433954"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_InvestmentCompanyNetAssetsFromOperationIncreaseDecreaseAbstract_1433946" xlink:to="loc_slrc_InvestmentOwnedInterestAndDividendIncome_1433954" use="optional" order="69"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/cef/role/SecurityOnly">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1626145"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CreditFacilityMember" xlink:label="loc_slrc_CreditFacilityMember_1626211"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_CreditFacilityMember_1626211" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CreditFacilityOneMember" xlink:label="loc_slrc_CreditFacilityOneMember_1626213"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_CreditFacilityOneMember_1626213" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyTwoUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyTwoUnsecuredNotesMember_1626214"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_TwoThousandAndTwentyTwoUnsecuredNotesMember_1626214" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyTwoTrancheCNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyTwoTrancheCNotesMember_1626215"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_TwoThousandAndTwentyTwoTrancheCNotesMember_1626215" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyThreeUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyThreeUnsecuredNotesMember_1626216"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_TwoThousandAndTwentyThreeUnsecuredNotesMember_1626216" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyFourUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyFourUnsecuredNotesMember_1626218"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_TwoThousandAndTwentyFourUnsecuredNotesMember_1626218" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyFiveUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyFiveUnsecuredNotesMember_1626235"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_TwoThousandAndTwentyFiveUnsecuredNotesMember_1626235" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentySixUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentySixUnsecuredNotesMember_1626236"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_TwoThousandAndTwentySixUnsecuredNotesMember_1626236" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentySevenUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentySevenUnsecuredNotesMember_1626237"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_TwoThousandAndTwentySevenUnsecuredNotesMember_1626237" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentySevenSeriesFUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentySevenSeriesFUnsecuredNotesMember_1626239"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_TwoThousandAndTwentySevenSeriesFUnsecuredNotesMember_1626239" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndFortyTwoUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndFortyTwoUnsecuredNotesMember_1626359"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_TwoThousandAndFortyTwoUnsecuredNotesMember_1626359" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SeniorSecuredNotesMember" xlink:label="loc_slrc_SeniorSecuredNotesMember_1626360"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_SeniorSecuredNotesMember_1626360" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TermLoansMember" xlink:label="loc_slrc_TermLoansMember_1626361"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_TermLoansMember_1626361" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_NefpassFacilityMember" xlink:label="loc_slrc_NefpassFacilityMember_1626362"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_NefpassFacilityMember_1626362" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SslpFacilityMember" xlink:label="loc_slrc_SslpFacilityMember_1626363"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_SslpFacilityMember_1626363" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_OnAOneThousandInvestmentMember" xlink:label="loc_slrc_OnAOneThousandInvestmentMember_1697761"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1626145" xlink:to="loc_slrc_OnAOneThousandInvestmentMember_1697761" use="optional" order="16"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/cef/role/RiskOnly">
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cef/2023/cef-2023.xsd#cef_AllRisksMember" xlink:label="loc_cef_AllRisksMember_1626154"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_RisksRelatingToOurInvestmentsMember" xlink:label="loc_slrc_RisksRelatingToOurInvestmentsMember_1697732"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cef_AllRisksMember_1626154" xlink:to="loc_slrc_RisksRelatingToOurInvestmentsMember_1697732" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_RisksRelatingToAnInvestmentInOurSecuritiesMember" xlink:label="loc_slrc_RisksRelatingToAnInvestmentInOurSecuritiesMember_1697733"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cef_AllRisksMember_1626154" xlink:to="loc_slrc_RisksRelatingToAnInvestmentInOurSecuritiesMember_1697733" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_RisksRelatingToOurBusinessAndStructureMember" xlink:label="loc_slrc_RisksRelatingToOurBusinessAndStructureMember_1697734"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cef_AllRisksMember_1626154" xlink:to="loc_slrc_RisksRelatingToOurBusinessAndStructureMember_1697734" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_GeneralRiskFactorsMember" xlink:label="loc_slrc_GeneralRiskFactorsMember_1699060"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cef_AllRisksMember_1626154" xlink:to="loc_slrc_GeneralRiskFactorsMember_1699060" use="optional" order="20"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/SlrEquipmentFinance">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435774"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentsDisclosureTextBlock" xlink:label="loc_us-gaap_EquityMethodInvestmentsDisclosureTextBlock_1435763"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435774" xlink:to="loc_us-gaap_EquityMethodInvestmentsDisclosureTextBlock_1435763" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_1435772"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435774" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_1435772" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1435775"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_1435772" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1435775" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1435776"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1435775" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1435776" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1435776_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1435775" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1435776_default" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrEquipmentFinanceMember" xlink:label="loc_slrc_SlrEquipmentFinanceMember_1435778"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_1435776" xlink:to="loc_slrc_SlrEquipmentFinanceMember_1435778" use="optional" order="6"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/OrganizationAdditionalInformationDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems" xlink:label="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_1431330"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable" xlink:label="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_1431328"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_1431330" xlink:to="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_1431328" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_1431331"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_1431328" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_1431331" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_1431332"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1431331" xlink:to="loc_us-gaap_EquityComponentDomain_1431332" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_1431332_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1431331" xlink:to="loc_us-gaap_EquityComponentDomain_1431332_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_1431334"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_1431332" xlink:to="loc_us-gaap_CommonStockMember_1431334" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_1431336"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_1431328" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_1431336" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_1431337"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_1431336" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_1431337" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_1431337_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_1431336" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_1431337_default" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IPOMember" xlink:label="loc_us-gaap_IPOMember_1431338"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_1431337" xlink:to="loc_us-gaap_IPOMember_1431338" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OverAllotmentOptionMember" xlink:label="loc_us-gaap_OverAllotmentOptionMember_1431339"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_1431337" xlink:to="loc_us-gaap_OverAllotmentOptionMember_1431339" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrivatePlacementMember" xlink:label="loc_us-gaap_PrivatePlacementMember_1431340"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_1431337" xlink:to="loc_us-gaap_PrivatePlacementMember_1431340" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_1697726"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_1431328" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_1697726" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1697727"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1697726" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1697727" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1697727_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1697726" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1697727_default" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SunsCompanyMergerMember" xlink:label="loc_slrc_SunsCompanyMergerMember_1697728"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1697727" xlink:to="loc_slrc_SunsCompanyMergerMember_1697728" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_1431361"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_1431330" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_1431361" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SharePrice" xlink:label="loc_us-gaap_SharePrice_1431363"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_1431330" xlink:to="loc_us-gaap_SharePrice_1431363" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SharesIssuedPricePerShare" xlink:label="loc_us-gaap_SharesIssuedPricePerShare_1697729"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_1431330" xlink:to="loc_us-gaap_SharesIssuedPricePerShare_1697729" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_1697730"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_1431330" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_1697730" use="optional" order="19"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/SignificantAccountingPoliciesAdditionalInformationDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_1431407"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_1431406"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_1431407" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_1431406" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_1431408"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_1431406" xlink:to="loc_srt_RangeAxis_1431408" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1431409"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1431408" xlink:to="loc_srt_RangeMember_1431409" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1431409_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1431408" xlink:to="loc_srt_RangeMember_1431409_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_1431410"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1431409" xlink:to="loc_srt_MaximumMember_1431410" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_1431411"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1431409" xlink:to="loc_srt_MinimumMember_1431411" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTerm" xlink:label="loc_us-gaap_DebtInstrumentTerm_1431422"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_1431407" xlink:to="loc_us-gaap_DebtInstrumentTerm_1431422" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageOfExciseTax" xlink:label="loc_slrc_PercentageOfExciseTax_1431415"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_1431407" xlink:to="loc_slrc_PercentageOfExciseTax_1431415" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_RestrictedInvestmentTerm" xlink:label="loc_slrc_RestrictedInvestmentTerm_1431419"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_1431407" xlink:to="loc_slrc_RestrictedInvestmentTerm_1431419" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ReclassificationBetweenAccumulatedDistributableNetLossAndpaidIncapitalInExcessOfPar" xlink:label="loc_slrc_ReclassificationBetweenAccumulatedDistributableNetLossAndpaidIncapitalInExcessOfPar_1697731"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_1431407" xlink:to="loc_slrc_ReclassificationBetweenAccumulatedDistributableNetLossAndpaidIncapitalInExcessOfPar_1697731" use="optional" order="10"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/AgreementsAdditionalInformationDetails">
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AgreementLineItems" xlink:label="loc_slrc_AgreementLineItems_1431703"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AgreementsTable" xlink:label="loc_slrc_AgreementsTable_1431690"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_slrc_AgreementLineItems_1431703" xlink:to="loc_slrc_AgreementsTable_1431690" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AgreementAxis" xlink:label="loc_slrc_AgreementAxis_1431692"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_slrc_AgreementsTable_1431690" xlink:to="loc_slrc_AgreementAxis_1431692" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AgreementDomain" xlink:label="loc_slrc_AgreementDomain_1431695"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_slrc_AgreementAxis_1431692" xlink:to="loc_slrc_AgreementDomain_1431695" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AgreementDomain" xlink:label="loc_slrc_AgreementDomain_1431695_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_slrc_AgreementAxis_1431692" xlink:to="loc_slrc_AgreementDomain_1431695_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AdvisoryAgreementMember" xlink:label="loc_slrc_AdvisoryAgreementMember_1431699"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_AgreementDomain_1431695" xlink:to="loc_slrc_AdvisoryAgreementMember_1431699" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_1431736"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_slrc_AgreementsTable_1431690" xlink:to="loc_srt_RangeAxis_1431736" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1431737"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1431736" xlink:to="loc_srt_RangeMember_1431737" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1431737_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1431736" xlink:to="loc_srt_RangeMember_1431737_default" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_1431738"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1431737" xlink:to="loc_srt_MinimumMember_1431738" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_1431739"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1431737" xlink:to="loc_srt_MaximumMember_1431739" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageOfGrossAssets" xlink:label="loc_slrc_PercentageOfGrossAssets_1431705"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_AgreementLineItems_1431703" xlink:to="loc_slrc_PercentageOfGrossAssets_1431705" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageOfTotalNetAssets" xlink:label="loc_slrc_PercentageOfTotalNetAssets_1431708"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_AgreementLineItems_1431703" xlink:to="loc_slrc_PercentageOfTotalNetAssets_1431708" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PreIncentiveFeeNetInvestmentIncomeQuarterHurdleRate" xlink:label="loc_slrc_PreIncentiveFeeNetInvestmentIncomeQuarterHurdleRate_1431740"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_AgreementLineItems_1431703" xlink:to="loc_slrc_PreIncentiveFeeNetInvestmentIncomeQuarterHurdleRate_1431740" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PreIncentiveFeeNetInvestmentIncomeAnnualHurdleRate" xlink:label="loc_slrc_PreIncentiveFeeNetInvestmentIncomeAnnualHurdleRate_1431741"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_AgreementLineItems_1431703" xlink:to="loc_slrc_PreIncentiveFeeNetInvestmentIncomeAnnualHurdleRate_1431741" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageOfPreIncentiveFeeNetInvestmentIncome" xlink:label="loc_slrc_PercentageOfPreIncentiveFeeNetInvestmentIncome_1431742"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_AgreementLineItems_1431703" xlink:to="loc_slrc_PercentageOfPreIncentiveFeeNetInvestmentIncome_1431742" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageOfCumulativeRealizedCapitalGainLoss" xlink:label="loc_slrc_PercentageOfCumulativeRealizedCapitalGainLoss_1431755"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_AgreementLineItems_1431703" xlink:to="loc_slrc_PercentageOfCumulativeRealizedCapitalGainLoss_1431755" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageOfCumulativeNetRealizedGainAndUnrealizedCapitalAppreciation" xlink:label="loc_slrc_PercentageOfCumulativeNetRealizedGainAndUnrealizedCapitalAppreciation_1431759"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_AgreementLineItems_1431703" xlink:to="loc_slrc_PercentageOfCumulativeNetRealizedGainAndUnrealizedCapitalAppreciation_1431759" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ManagementFeeExpense" xlink:label="loc_us-gaap_ManagementFeeExpense_1431766"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_AgreementLineItems_1431703" xlink:to="loc_us-gaap_ManagementFeeExpense_1431766" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PerformanceBasedIncentiveFees" xlink:label="loc_slrc_PerformanceBasedIncentiveFees_1431768"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_AgreementLineItems_1431703" xlink:to="loc_slrc_PerformanceBasedIncentiveFees_1431768" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdministrativeFeesExpense" xlink:label="loc_us-gaap_AdministrativeFeesExpense_1431770"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_AgreementLineItems_1431703" xlink:to="loc_us-gaap_AdministrativeFeesExpense_1431770" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PerformanceBasedIncentiveFeesWaiver" xlink:label="loc_slrc_PerformanceBasedIncentiveFeesWaiver_1570026"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_AgreementLineItems_1431703" xlink:to="loc_slrc_PerformanceBasedIncentiveFeesWaiver_1570026" use="optional" order="21"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/FairValueSummaryOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_1432486"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_1432485"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_1432486" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_1432485" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_1432487"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_1432485" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_1432487" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_1432488"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_1432487" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_1432488" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_1432488_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_1432487" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_1432488_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_1432489"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_1432488" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_1432489" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432492"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_1432485" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432492" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432493"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432492" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432493" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432493_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432492" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432493_default" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_1432495"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432493" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_1432495" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_1432496"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432493" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_1432496" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_1432497"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432493" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_1432497" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_1432500"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_1432485" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_1432500" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432501"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_1432500" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432501" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432501_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_1432500" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432501_default" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentInSeniorSecuredLoansMember" xlink:label="loc_slrc_InvestmentInSeniorSecuredLoansMember_1432503"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432501" xlink:to="loc_slrc_InvestmentInSeniorSecuredLoansMember_1432503" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_EquipmentFinancingMember" xlink:label="loc_slrc_EquipmentFinancingMember_1432504"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432501" xlink:to="loc_slrc_EquipmentFinancingMember_1432504" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PreferredEquityMember" xlink:label="loc_slrc_PreferredEquityMember_1432505"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432501" xlink:to="loc_slrc_PreferredEquityMember_1432505" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesMember" xlink:label="loc_us-gaap_EquitySecuritiesMember_1432506"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432501" xlink:to="loc_us-gaap_EquitySecuritiesMember_1432506" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByLiabilityClassAxis" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_1432514"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_1432485" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_1432514" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1432515"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_1432514" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1432515" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1432515_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_1432514" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1432515_default" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="loc_us-gaap_FinancialInstrumentAxis_1697976"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_1432485" xlink:to="loc_us-gaap_FinancialInstrumentAxis_1697976" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1697977"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_1697976" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1697977" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1697977_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_1697976" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1697977_default" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MeasuredAtNetAssetValueMember" xlink:label="loc_slrc_MeasuredAtNetAssetValueMember_1697978"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1697977" xlink:to="loc_slrc_MeasuredAtNetAssetValueMember_1697978" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentsFairValueDisclosure" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_1432507"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_1432486" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_1432507" use="optional" order="26"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/FairValueSummaryOfChangesInFairValueOfLevel3AssetsAndLiabilitiesDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432554"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_1432553"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432554" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_1432553" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_1432555"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_1432553" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_1432555" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432556"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_1432555" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432556" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432556_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_1432555" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432556_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentInSeniorSecuredLoansMember" xlink:label="loc_slrc_InvestmentInSeniorSecuredLoansMember_1432564"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432556" xlink:to="loc_slrc_InvestmentInSeniorSecuredLoansMember_1432564" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_EquipmentFinancingMember" xlink:label="loc_slrc_EquipmentFinancingMember_1432565"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432556" xlink:to="loc_slrc_EquipmentFinancingMember_1432565" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PreferredEquityMember" xlink:label="loc_slrc_PreferredEquityMember_1432566"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432556" xlink:to="loc_slrc_PreferredEquityMember_1432566" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesMember" xlink:label="loc_us-gaap_EquitySecuritiesMember_1432570"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432556" xlink:to="loc_us-gaap_EquitySecuritiesMember_1432570" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_1432573"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432554" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_1432573" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_FairValueMeasurementWithUnobservableInputsReconciliationBasisRealizedGainLossIncludedInEarnings" xlink:label="loc_slrc_FairValueMeasurementWithUnobservableInputsReconciliationBasisRealizedGainLossIncludedInEarnings_1432574"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432554" xlink:to="loc_slrc_FairValueMeasurementWithUnobservableInputsReconciliationBasisRealizedGainLossIncludedInEarnings_1432574" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_1432575"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432554" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_1432575" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList" xlink:label="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList_1697988"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432554" xlink:to="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList_1697988" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_1432576"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432554" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_1432576" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_1432577"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432554" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_1432577" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_1432578"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432554" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_1432578" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_1432582"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432554" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_1432582" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetRecurringBasisStillHeldUnrealizedGainLossStatementOfIncomeExtensibleList" xlink:label="loc_us-gaap_FairValueAssetRecurringBasisStillHeldUnrealizedGainLossStatementOfIncomeExtensibleList_1697989"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432554" xlink:to="loc_us-gaap_FairValueAssetRecurringBasisStillHeldUnrealizedGainLossStatementOfIncomeExtensibleList_1697989" use="optional" order="17"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/FairValueSummaryOfFairValuedLiabilitiesMeasuredUsingSignificantUnobservableInputsLevel3Details">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432682"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_1432679"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432682" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_1432679" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByLiabilityClassAxis" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_1432685"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_1432679" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_1432685" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1432686"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_1432685" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1432686" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1432686_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_1432685" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1432686_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyTwoUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyTwoUnsecuredNotesMember_1432690"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1432686" xlink:to="loc_slrc_TwoThousandAndTwentyTwoUnsecuredNotesMember_1432690" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_1432694"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432682" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_1432694" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityRealizedGainLossIncludedInEarnings" xlink:label="loc_slrc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityRealizedGainLossIncludedInEarnings_1432695"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432682" xlink:to="loc_slrc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityRealizedGainLossIncludedInEarnings_1432695" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_1432696"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432682" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_1432696" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues_1432697"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432682" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues_1432697" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_1432698"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432682" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_1432698" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet_1432699"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432682" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet_1432699" use="optional" order="11"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/FairValueSummaryOfFairValuedLiabilitiesMeasuredUsingSignificantUnobservableInputsLevel3ParentheticalDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432753"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_1432751"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432753" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_1432751" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432756"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_1432751" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432756" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432757"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432756" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432757" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432757_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432756" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432757_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByLiabilityClassAxis" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_1432760"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_1432751" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_1432760" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1432761"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_1432760" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1432761" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1432761_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_1432760" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1432761_default" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_1697770"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_1432751" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_1697770" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_1697771"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_1697770" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_1697771" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_1697771_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_1697770" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_1697771_default" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TermLoanAndCreditFacilityMember" xlink:label="loc_slrc_TermLoanAndCreditFacilityMember_1697773"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1697771" xlink:to="loc_slrc_TermLoanAndCreditFacilityMember_1697773" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CreditFacilityOneMember" xlink:label="loc_slrc_CreditFacilityOneMember_1697774"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1697771" xlink:to="loc_slrc_CreditFacilityOneMember_1697774" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyThreeUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyThreeUnsecuredNotesMember_1697775"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1697771" xlink:to="loc_slrc_TwoThousandAndTwentyThreeUnsecuredNotesMember_1697775" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyFourUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyFourUnsecuredNotesMember_1697776"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1697771" xlink:to="loc_slrc_TwoThousandAndTwentyFourUnsecuredNotesMember_1697776" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyFiveUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyFiveUnsecuredNotesMember_1697777"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1697771" xlink:to="loc_slrc_TwoThousandAndTwentyFiveUnsecuredNotesMember_1697777" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentySixUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentySixUnsecuredNotesMember_1697778"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1697771" xlink:to="loc_slrc_TwoThousandAndTwentySixUnsecuredNotesMember_1697778" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentySevenUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentySevenUnsecuredNotesMember_1697983"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1697771" xlink:to="loc_slrc_TwoThousandAndTwentySevenUnsecuredNotesMember_1697983" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentySevenSeriesFUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentySevenSeriesFUnsecuredNotesMember_1697780"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1697771" xlink:to="loc_slrc_TwoThousandAndTwentySevenSeriesFUnsecuredNotesMember_1697780" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="loc_us-gaap_DebtInstrumentFairValue_1697769"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1432753" xlink:to="loc_us-gaap_DebtInstrumentFairValue_1697769" use="optional" order="19"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/FairValueSummaryOfQuantitativeInformationAboutTheCompanysLevel3AssetAndLiabilityDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_1432774"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_1432773"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_1432774" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_1432773" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_1432775"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_1432773" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_1432775" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432776"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_1432775" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432776" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432776_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_1432775" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432776_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentInSeniorSecuredLoansMember" xlink:label="loc_slrc_InvestmentInSeniorSecuredLoansMember_1432777"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432776" xlink:to="loc_slrc_InvestmentInSeniorSecuredLoansMember_1432777" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_EquipmentFinancingMember" xlink:label="loc_slrc_EquipmentFinancingMember_1432778"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432776" xlink:to="loc_slrc_EquipmentFinancingMember_1432778" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PreferredEquityMember" xlink:label="loc_slrc_PreferredEquityMember_1432779"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432776" xlink:to="loc_slrc_PreferredEquityMember_1432779" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesMember" xlink:label="loc_us-gaap_EquitySecuritiesMember_1432781"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432776" xlink:to="loc_us-gaap_EquitySecuritiesMember_1432781" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueAxis" xlink:label="loc_us-gaap_ValuationTechniqueAxis_1432784"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_1432773" xlink:to="loc_us-gaap_ValuationTechniqueAxis_1432784" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="loc_us-gaap_ValuationTechniqueDomain_1432785"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_1432784" xlink:to="loc_us-gaap_ValuationTechniqueDomain_1432785" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="loc_us-gaap_ValuationTechniqueDomain_1432785_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_1432784" xlink:to="loc_us-gaap_ValuationTechniqueDomain_1432785_default" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeApproachValuationTechniqueMember" xlink:label="loc_us-gaap_IncomeApproachValuationTechniqueMember_1432786"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_1432785" xlink:to="loc_us-gaap_IncomeApproachValuationTechniqueMember_1432786" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ValuationApproachMarketMultipleMember" xlink:label="loc_slrc_ValuationApproachMarketMultipleMember_1432787"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_1432785" xlink:to="loc_slrc_ValuationApproachMarketMultipleMember_1432787" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketApproachValuationTechniqueMember" xlink:label="loc_us-gaap_MarketApproachValuationTechniqueMember_1432788"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_1432785" xlink:to="loc_us-gaap_MarketApproachValuationTechniqueMember_1432788" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ValuationTechniqueRecoveryApproachMember" xlink:label="loc_slrc_ValuationTechniqueRecoveryApproachMember_1698131"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_1432785" xlink:to="loc_slrc_ValuationTechniqueRecoveryApproachMember_1698131" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputTypeAxis" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_1432789"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_1432773" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_1432789" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_1432790"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_1432789" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_1432790" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_1432790_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_1432789" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_1432790_default" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MeasurementInputMarketYieldMember" xlink:label="loc_slrc_MeasurementInputMarketYieldMember_1432791"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_1432790" xlink:to="loc_slrc_MeasurementInputMarketYieldMember_1432791" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MeasurementInputComparableMultipleMember" xlink:label="loc_slrc_MeasurementInputComparableMultipleMember_1432792"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_1432790" xlink:to="loc_slrc_MeasurementInputComparableMultipleMember_1432792" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MeasurementInputReturnOnEquityMember" xlink:label="loc_slrc_MeasurementInputReturnOnEquityMember_1432793"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_1432790" xlink:to="loc_slrc_MeasurementInputReturnOnEquityMember_1432793" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MeasurementInputRecoverableAmountMember" xlink:label="loc_slrc_MeasurementInputRecoverableAmountMember_1698132"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_1432790" xlink:to="loc_slrc_MeasurementInputRecoverableAmountMember_1698132" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432796"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_1432773" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432796" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432797"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432796" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432797" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432797_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432796" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432797_default" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_1432798"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432797" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_1432798" use="optional" order="26"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentsFairValueDisclosure" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_1432806"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_1432774" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_1432806" use="optional" order="27"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_DescriptionOfFairValueMeasurementValuationProcess" xlink:label="loc_slrc_DescriptionOfFairValueMeasurementValuationProcess_1432810"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_1432774" xlink:to="loc_slrc_DescriptionOfFairValueMeasurementValuationProcess_1432810" use="optional" order="28"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_DescriptionOfSignificantUnobservableInputUsed" xlink:label="loc_slrc_DescriptionOfSignificantUnobservableInputUsed_1432820"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_1432774" xlink:to="loc_slrc_DescriptionOfSignificantUnobservableInputUsed_1432820" use="optional" order="29"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/FairValueSummaryOfQuantitativeInformationAboutTheCompanysLevel3AssetAndLiabilityParentheticalDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_1432858"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_1432856"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_1432858" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_1432856" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_1432859"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_1432856" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_1432859" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432860"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_1432859" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432860" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432860_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_1432859" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432860_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentInSeniorSecuredLoansMember" xlink:label="loc_slrc_InvestmentInSeniorSecuredLoansMember_1432861"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432860" xlink:to="loc_slrc_InvestmentInSeniorSecuredLoansMember_1432861" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_EquipmentFinancingMember" xlink:label="loc_slrc_EquipmentFinancingMember_1432862"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432860" xlink:to="loc_slrc_EquipmentFinancingMember_1432862" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PreferredEquityMember" xlink:label="loc_slrc_PreferredEquityMember_1432864"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432860" xlink:to="loc_slrc_PreferredEquityMember_1432864" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesMember" xlink:label="loc_us-gaap_EquitySecuritiesMember_1433215"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1432860" xlink:to="loc_us-gaap_EquitySecuritiesMember_1433215" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueAxis" xlink:label="loc_us-gaap_ValuationTechniqueAxis_1432866"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_1432856" xlink:to="loc_us-gaap_ValuationTechniqueAxis_1432866" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="loc_us-gaap_ValuationTechniqueDomain_1432867"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_1432866" xlink:to="loc_us-gaap_ValuationTechniqueDomain_1432867" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="loc_us-gaap_ValuationTechniqueDomain_1432867_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_1432866" xlink:to="loc_us-gaap_ValuationTechniqueDomain_1432867_default" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeApproachValuationTechniqueMember" xlink:label="loc_us-gaap_IncomeApproachValuationTechniqueMember_1432868"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_1432867" xlink:to="loc_us-gaap_IncomeApproachValuationTechniqueMember_1432868" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ValuationApproachMarketMultipleMember" xlink:label="loc_slrc_ValuationApproachMarketMultipleMember_1432871"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_1432867" xlink:to="loc_slrc_ValuationApproachMarketMultipleMember_1432871" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketApproachValuationTechniqueMember" xlink:label="loc_us-gaap_MarketApproachValuationTechniqueMember_1432873"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_1432867" xlink:to="loc_us-gaap_MarketApproachValuationTechniqueMember_1432873" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputTypeAxis" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_1432875"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_1432856" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_1432875" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_1432876"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_1432875" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_1432876" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_1432876_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_1432875" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_1432876_default" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MeasurementInputMarketYieldMember" xlink:label="loc_slrc_MeasurementInputMarketYieldMember_1432877"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_1432876" xlink:to="loc_slrc_MeasurementInputMarketYieldMember_1432877" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MeasurementInputComparableMultipleMember" xlink:label="loc_slrc_MeasurementInputComparableMultipleMember_1432878"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_1432876" xlink:to="loc_slrc_MeasurementInputComparableMultipleMember_1432878" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MeasurementInputReturnOnEquityMember" xlink:label="loc_slrc_MeasurementInputReturnOnEquityMember_1432879"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_1432876" xlink:to="loc_slrc_MeasurementInputReturnOnEquityMember_1432879" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_1432886"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_1432856" xlink:to="loc_srt_RangeAxis_1432886" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1432887"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1432886" xlink:to="loc_srt_RangeMember_1432887" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1432887_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1432886" xlink:to="loc_srt_RangeMember_1432887_default" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_1432889"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1432887" xlink:to="loc_srt_MinimumMember_1432889" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_1432888"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1432887" xlink:to="loc_srt_MaximumMember_1432888" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_WeightedAverageMember" xlink:label="loc_srt_WeightedAverageMember_1432893"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1432887" xlink:to="loc_srt_WeightedAverageMember_1432893" use="optional" order="26"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MeasurementInputTypeOneAxis" xlink:label="loc_slrc_MeasurementInputTypeOneAxis_1432890"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_1432856" xlink:to="loc_slrc_MeasurementInputTypeOneAxis_1432890" use="optional" order="27"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MeasurementInputTypeOneDomain" xlink:label="loc_slrc_MeasurementInputTypeOneDomain_1432891"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_slrc_MeasurementInputTypeOneAxis_1432890" xlink:to="loc_slrc_MeasurementInputTypeOneDomain_1432891" use="optional" order="28"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MeasurementInputTypeOneDomain" xlink:label="loc_slrc_MeasurementInputTypeOneDomain_1432891_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_slrc_MeasurementInputTypeOneAxis_1432890" xlink:to="loc_slrc_MeasurementInputTypeOneDomain_1432891_default" use="optional" order="29"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputEbitdaMultipleMember" xlink:label="loc_us-gaap_MeasurementInputEbitdaMultipleMember_1432892"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_MeasurementInputTypeOneDomain_1432891" xlink:to="loc_us-gaap_MeasurementInputEbitdaMultipleMember_1432892" use="optional" order="30"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_BlackScholesPricingModelMember" xlink:label="loc_slrc_BlackScholesPricingModelMember_1432896"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_MeasurementInputTypeOneDomain_1432891" xlink:to="loc_slrc_BlackScholesPricingModelMember_1432896" use="optional" order="31"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432898"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_1432856" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432898" use="optional" order="32"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432899"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432898" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432899" use="optional" order="33"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432899_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1432898" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432899_default" use="optional" order="34"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_1432900"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1432899" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_1432900" use="optional" order="35"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput" xlink:label="loc_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput_1698834"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_1432858" xlink:to="loc_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput_1698834" use="optional" order="36"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentsFairValueDisclosure" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_1432901"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_1432858" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_1432901" use="optional" order="37"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/DebtScheduleOfLongTermDebtInstrumentsDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_1433326"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_1433323"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433326" xlink:to="loc_us-gaap_DebtInstrumentTable_1433323" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_1433327"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_1433323" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_1433327" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_1433332"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_1433327" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_1433332" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_1433332_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_1433327" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_1433332_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TermLoanAndCreditFacilityMember" xlink:label="loc_slrc_TermLoanAndCreditFacilityMember_1433337"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433332" xlink:to="loc_slrc_TermLoanAndCreditFacilityMember_1433337" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CreditFacilityOneMember" xlink:label="loc_slrc_CreditFacilityOneMember_1433340"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433332" xlink:to="loc_slrc_CreditFacilityOneMember_1433340" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyThreeUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyThreeUnsecuredNotesMember_1433349"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433332" xlink:to="loc_slrc_TwoThousandAndTwentyThreeUnsecuredNotesMember_1433349" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyFourUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyFourUnsecuredNotesMember_1433359"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433332" xlink:to="loc_slrc_TwoThousandAndTwentyFourUnsecuredNotesMember_1433359" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyFiveUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyFiveUnsecuredNotesMember_1433360"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433332" xlink:to="loc_slrc_TwoThousandAndTwentyFiveUnsecuredNotesMember_1433360" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentySixUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentySixUnsecuredNotesMember_1433362"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433332" xlink:to="loc_slrc_TwoThousandAndTwentySixUnsecuredNotesMember_1433362" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentySevenUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentySevenUnsecuredNotesMember_1433363"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433332" xlink:to="loc_slrc_TwoThousandAndTwentySevenUnsecuredNotesMember_1433363" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentySevenSeriesFUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentySevenSeriesFUnsecuredNotesMember_1433364"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433332" xlink:to="loc_slrc_TwoThousandAndTwentySevenSeriesFUnsecuredNotesMember_1433364" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_1433390"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433326" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_1433390" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LineOfCreditAndTermLoanOutstanding" xlink:label="loc_slrc_LineOfCreditAndTermLoanOutstanding_1433391"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433326" xlink:to="loc_slrc_LineOfCreditAndTermLoanOutstanding_1433391" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_1433392"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433326" xlink:to="loc_us-gaap_LineOfCredit_1433392" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnsecuredDebt" xlink:label="loc_us-gaap_UnsecuredDebt_1433393"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433326" xlink:to="loc_us-gaap_UnsecuredDebt_1433393" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_1433394"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433326" xlink:to="loc_us-gaap_LongTermDebt_1433394" use="optional" order="17"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/DebtScheduleOfLongTermDebtInstrumentsParentheticalDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_1433445"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_1433444"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433445" xlink:to="loc_us-gaap_DebtInstrumentTable_1433444" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_1433446"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_1433444" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_1433446" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_1433447"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_1433446" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_1433447" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_1433447_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_1433446" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_1433447_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TermLoanAndCreditFacilityMember" xlink:label="loc_slrc_TermLoanAndCreditFacilityMember_1433448"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433447" xlink:to="loc_slrc_TermLoanAndCreditFacilityMember_1433448" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CreditFacilityOneMember" xlink:label="loc_slrc_CreditFacilityOneMember_1433450"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433447" xlink:to="loc_slrc_CreditFacilityOneMember_1433450" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyThreeUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyThreeUnsecuredNotesMember_1433452"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433447" xlink:to="loc_slrc_TwoThousandAndTwentyThreeUnsecuredNotesMember_1433452" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyFourUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyFourUnsecuredNotesMember_1433453"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433447" xlink:to="loc_slrc_TwoThousandAndTwentyFourUnsecuredNotesMember_1433453" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyFiveUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyFiveUnsecuredNotesMember_1433454"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433447" xlink:to="loc_slrc_TwoThousandAndTwentyFiveUnsecuredNotesMember_1433454" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentySixUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentySixUnsecuredNotesMember_1433455"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433447" xlink:to="loc_slrc_TwoThousandAndTwentySixUnsecuredNotesMember_1433455" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentySevenUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentySevenUnsecuredNotesMember_1433456"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433447" xlink:to="loc_slrc_TwoThousandAndTwentySevenUnsecuredNotesMember_1433456" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentySevenSeriesFUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentySevenSeriesFUnsecuredNotesMember_1433458"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433447" xlink:to="loc_slrc_TwoThousandAndTwentySevenSeriesFUnsecuredNotesMember_1433458" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_1433459"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433445" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_1433459" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentUnamortizedDiscount" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_1569975"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433445" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_1569975" use="optional" order="14"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/DebtAdditionalInformationDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_1433797"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_1433747"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_us-gaap_DebtInstrumentTable_1433747" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_1433748"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_1433747" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_1433748" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_1433750"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_1433748" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_1433750" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_1433750_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_1433748" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_1433750_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CreditFacilityOneMember" xlink:label="loc_slrc_CreditFacilityOneMember_1433751"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433750" xlink:to="loc_slrc_CreditFacilityOneMember_1433751" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentySevenSeriesFUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentySevenSeriesFUnsecuredNotesMember_1433753"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433750" xlink:to="loc_slrc_TwoThousandAndTwentySevenSeriesFUnsecuredNotesMember_1433753" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyFourUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyFourUnsecuredNotesMember_1433756"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433750" xlink:to="loc_slrc_TwoThousandAndTwentyFourUnsecuredNotesMember_1433756" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentySixUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentySixUnsecuredNotesMember_1433758"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433750" xlink:to="loc_slrc_TwoThousandAndTwentySixUnsecuredNotesMember_1433758" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyTwoTrancheCNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyTwoTrancheCNotesMember_1433760"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433750" xlink:to="loc_slrc_TwoThousandAndTwentyTwoTrancheCNotesMember_1433760" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentyThreeUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentyThreeUnsecuredNotesMember_1433761"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433750" xlink:to="loc_slrc_TwoThousandAndTwentyThreeUnsecuredNotesMember_1433761" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TermLoanAndCreditFacilityMember" xlink:label="loc_slrc_TermLoanAndCreditFacilityMember_1433773"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433750" xlink:to="loc_slrc_TermLoanAndCreditFacilityMember_1433773" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TwoThousandAndTwentySevenUnsecuredNotesMember" xlink:label="loc_slrc_TwoThousandAndTwentySevenUnsecuredNotesMember_1434042"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1433750" xlink:to="loc_slrc_TwoThousandAndTwentySevenUnsecuredNotesMember_1434042" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TrancheAxis" xlink:label="loc_slrc_TrancheAxis_1433767"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_1433747" xlink:to="loc_slrc_TrancheAxis_1433767" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TrancheDomain" xlink:label="loc_slrc_TrancheDomain_1433768"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_slrc_TrancheAxis_1433767" xlink:to="loc_slrc_TrancheDomain_1433768" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TrancheDomain" xlink:label="loc_slrc_TrancheDomain_1433768_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_slrc_TrancheAxis_1433767" xlink:to="loc_slrc_TrancheDomain_1433768_default" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_1433774"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_1433747" xlink:to="loc_srt_RangeAxis_1433774" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1433775"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1433774" xlink:to="loc_srt_RangeMember_1433775" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1433775_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1433774" xlink:to="loc_srt_RangeMember_1433775_default" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_1433776"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1433775" xlink:to="loc_srt_MaximumMember_1433776" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_1433777"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1433775" xlink:to="loc_srt_MinimumMember_1433777" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_1433778"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_1433747" xlink:to="loc_us-gaap_VariableRateAxis_1433778" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_1433779"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_1433778" xlink:to="loc_us-gaap_VariableRateDomain_1433779" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_1433779_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_1433778" xlink:to="loc_us-gaap_VariableRateDomain_1433779_default" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LondonInterbankOfferedRateMember" xlink:label="loc_slrc_LondonInterbankOfferedRateMember_1699067"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_1433779" xlink:to="loc_slrc_LondonInterbankOfferedRateMember_1699067" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SecuredOvernightFinancingRateMember" xlink:label="loc_slrc_SecuredOvernightFinancingRateMember_1699068"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_1433779" xlink:to="loc_slrc_SecuredOvernightFinancingRateMember_1699068" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_1433785"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_1433747" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_1433785" use="optional" order="26"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_1433786"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_1433785" xlink:to="loc_us-gaap_RelatedPartyDomain_1433786" use="optional" order="27"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_1433786_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_1433785" xlink:to="loc_us-gaap_RelatedPartyDomain_1433786_default" use="optional" order="28"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SunsSpvLlcMember" xlink:label="loc_slrc_SunsSpvLlcMember_1433787"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_1433786" xlink:to="loc_slrc_SunsSpvLlcMember_1433787" use="optional" order="29"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CreditFacilityMember" xlink:label="loc_slrc_CreditFacilityMember_1570033"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_1433786" xlink:to="loc_slrc_CreditFacilityMember_1570033" use="optional" order="30"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CollateralAgentAxis" xlink:label="loc_slrc_CollateralAgentAxis_1433788"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_1433747" xlink:to="loc_slrc_CollateralAgentAxis_1433788" use="optional" order="31"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CollateralAgentDomain" xlink:label="loc_slrc_CollateralAgentDomain_1433789"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_slrc_CollateralAgentAxis_1433788" xlink:to="loc_slrc_CollateralAgentDomain_1433789" use="optional" order="32"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CollateralAgentDomain" xlink:label="loc_slrc_CollateralAgentDomain_1433789_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_slrc_CollateralAgentAxis_1433788" xlink:to="loc_slrc_CollateralAgentDomain_1433789_default" use="optional" order="33"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CitiBankNaMember" xlink:label="loc_slrc_CitiBankNaMember_1433790"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_CollateralAgentDomain_1433789" xlink:to="loc_slrc_CitiBankNaMember_1433790" use="optional" order="34"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LongTermDebtOneAxis" xlink:label="loc_slrc_LongTermDebtOneAxis_1433791"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_1433747" xlink:to="loc_slrc_LongTermDebtOneAxis_1433791" use="optional" order="35"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LongTermDebtOneDomain" xlink:label="loc_slrc_LongTermDebtOneDomain_1433792"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_slrc_LongTermDebtOneAxis_1433791" xlink:to="loc_slrc_LongTermDebtOneDomain_1433792" use="optional" order="36"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LongTermDebtOneDomain" xlink:label="loc_slrc_LongTermDebtOneDomain_1433792_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_slrc_LongTermDebtOneAxis_1433791" xlink:to="loc_slrc_LongTermDebtOneDomain_1433792_default" use="optional" order="37"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_1433793"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_LongTermDebtOneDomain_1433792" xlink:to="loc_us-gaap_LineOfCreditMember_1433793" use="optional" order="38"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TermLoanMember" xlink:label="loc_slrc_TermLoanMember_1433794"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_LongTermDebtOneDomain_1433792" xlink:to="loc_slrc_TermLoanMember_1433794" use="optional" order="39"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AgreementAxis" xlink:label="loc_slrc_AgreementAxis_1698126"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_1433747" xlink:to="loc_slrc_AgreementAxis_1698126" use="optional" order="40"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AgreementDomain" xlink:label="loc_slrc_AgreementDomain_1698127"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_slrc_AgreementAxis_1698126" xlink:to="loc_slrc_AgreementDomain_1698127" use="optional" order="41"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AgreementDomain" xlink:label="loc_slrc_AgreementDomain_1698127_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_slrc_AgreementAxis_1698126" xlink:to="loc_slrc_AgreementDomain_1698127_default" use="optional" order="42"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AmendmentAgreementToIncreaseCreditFacilityMember" xlink:label="loc_slrc_AmendmentAgreementToIncreaseCreditFacilityMember_1698128"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_AgreementDomain_1698127" xlink:to="loc_slrc_AmendmentAgreementToIncreaseCreditFacilityMember_1698128" use="optional" order="43"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CreditFacilityCommitmentExpiredMember" xlink:label="loc_slrc_CreditFacilityCommitmentExpiredMember_1698130"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_AgreementDomain_1698127" xlink:to="loc_slrc_CreditFacilityCommitmentExpiredMember_1698130" use="optional" order="44"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_1433799"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_1433799" use="optional" order="45"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtTerm" xlink:label="loc_us-gaap_LongTermDebtTerm_1433806"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_us-gaap_LongTermDebtTerm_1433806" use="optional" order="46"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="loc_us-gaap_DebtInstrumentMaturityDate_1433807"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_us-gaap_DebtInstrumentMaturityDate_1433807" use="optional" order="47"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentPaymentTerms" xlink:label="loc_us-gaap_DebtInstrumentPaymentTerms_1433808"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_us-gaap_DebtInstrumentPaymentTerms_1433808" use="optional" order="48"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1433809"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1433809" use="optional" order="49"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromDebtNetOfIssuanceCosts" xlink:label="loc_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_1433956"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_1433956" use="optional" order="50"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_1434004"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_1434004" use="optional" order="51"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_1434005"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_1434005" use="optional" order="52"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LineOfCreditAndTermLoanOutstanding" xlink:label="loc_slrc_LineOfCreditAndTermLoanOutstanding_1434007"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_slrc_LineOfCreditAndTermLoanOutstanding_1434007" use="optional" order="53"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LineOfCreditMaximumBorrowingCapacityAndDebtInstrumentFaceValue" xlink:label="loc_slrc_LineOfCreditMaximumBorrowingCapacityAndDebtInstrumentFaceValue_1434009"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_slrc_LineOfCreditMaximumBorrowingCapacityAndDebtInstrumentFaceValue_1434009" use="optional" order="54"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherLongTermDebt" xlink:label="loc_us-gaap_OtherLongTermDebt_1434024"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_us-gaap_OtherLongTermDebt_1434024" use="optional" order="55"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_1434026"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_us-gaap_LineOfCredit_1434026" use="optional" order="56"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtWeightedAverageInterestRateOverTime" xlink:label="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_1434027"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_1434027" use="optional" order="57"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LongTermDebtMaximumAmountBorrowedDuringThePeriod" xlink:label="loc_slrc_LongTermDebtMaximumAmountBorrowedDuringThePeriod_1434028"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_slrc_LongTermDebtMaximumAmountBorrowedDuringThePeriod_1434028" use="optional" order="58"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LineOfCreditFacilityIncrease" xlink:label="loc_slrc_LineOfCreditFacilityIncrease_1698124"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_slrc_LineOfCreditFacilityIncrease_1698124" use="optional" order="59"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LineOfCreditFacilityCommitmentExpired" xlink:label="loc_slrc_LineOfCreditFacilityCommitmentExpired_1698129"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1433797" xlink:to="loc_slrc_LineOfCreditFacilityCommitmentExpired_1698129" use="optional" order="60"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/IncomeTaxInformationAndDistributionsToStockholdersAndOtherTaxInformationSummaryOfDistributionsToShareholdersDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697806"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_1697805"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697806" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_1697805" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyDistributionOrdinaryIncome" xlink:label="loc_us-gaap_InvestmentCompanyDistributionOrdinaryIncome_1697807"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697806" xlink:to="loc_us-gaap_InvestmentCompanyDistributionOrdinaryIncome_1697807" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyDistributionLongTermCapitalGain" xlink:label="loc_us-gaap_InvestmentCompanyDistributionLongTermCapitalGain_1697808"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697806" xlink:to="loc_us-gaap_InvestmentCompanyDistributionLongTermCapitalGain_1697808" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyReturnOfCapitalDistribution" xlink:label="loc_slrc_InvestmentCompanyReturnOfCapitalDistribution_1697979"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697806" xlink:to="loc_slrc_InvestmentCompanyReturnOfCapitalDistribution_1697979" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyDistributionRecognizedInSubsequentYear" xlink:label="loc_slrc_InvestmentCompanyDistributionRecognizedInSubsequentYear_1697991"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697806" xlink:to="loc_slrc_InvestmentCompanyDistributionRecognizedInSubsequentYear_1697991" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyDividendDistribution" xlink:label="loc_us-gaap_InvestmentCompanyDividendDistribution_1697810"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697806" xlink:to="loc_us-gaap_InvestmentCompanyDividendDistribution_1697810" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyDistributionOrdinaryIncomePercent" xlink:label="loc_slrc_InvestmentCompanyDistributionOrdinaryIncomePercent_1697811"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697806" xlink:to="loc_slrc_InvestmentCompanyDistributionOrdinaryIncomePercent_1697811" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyDistributionLongTermCapitalGainPercent" xlink:label="loc_slrc_InvestmentCompanyDistributionLongTermCapitalGainPercent_1697812"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697806" xlink:to="loc_slrc_InvestmentCompanyDistributionLongTermCapitalGainPercent_1697812" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyTaxReturnOfCapitalDistributionPercent" xlink:label="loc_slrc_InvestmentCompanyTaxReturnOfCapitalDistributionPercent_1697813"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697806" xlink:to="loc_slrc_InvestmentCompanyTaxReturnOfCapitalDistributionPercent_1697813" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyDistributionRecognizedInSubsequentYearPercent" xlink:label="loc_slrc_InvestmentCompanyDistributionRecognizedInSubsequentYearPercent_1697992"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697806" xlink:to="loc_slrc_InvestmentCompanyDistributionRecognizedInSubsequentYearPercent_1697992" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyDividendDistributionPercent" xlink:label="loc_slrc_InvestmentCompanyDividendDistributionPercent_1697814"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697806" xlink:to="loc_slrc_InvestmentCompanyDividendDistributionPercent_1697814" use="optional" order="11"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/IncomeTaxInformationAndDistributionsToStockholdersAndOtherTaxInformationSummaryOfTotalAccumulatedEarningsLossOnATaxBasisDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentsOwnedFederalIncomeTaxNoteLineItems" xlink:label="loc_us-gaap_InvestmentsOwnedFederalIncomeTaxNoteLineItems_1697818"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FederalIncomeTaxNoteTable" xlink:label="loc_us-gaap_FederalIncomeTaxNoteTable_1697817"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_InvestmentsOwnedFederalIncomeTaxNoteLineItems_1697818" xlink:to="loc_us-gaap_FederalIncomeTaxNoteTable_1697817" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedOrdinaryIncomeLoss" xlink:label="loc_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedOrdinaryIncomeLoss_1697819"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsOwnedFederalIncomeTaxNoteLineItems_1697818" xlink:to="loc_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedOrdinaryIncomeLoss_1697819" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedLongTermCapitalGainLoss" xlink:label="loc_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedLongTermCapitalGainLoss_1697820"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsOwnedFederalIncomeTaxNoteLineItems_1697818" xlink:to="loc_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedLongTermCapitalGainLoss_1697820" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyDistributableEarning" xlink:label="loc_slrc_InvestmentCompanyDistributableEarning_1697821"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsOwnedFederalIncomeTaxNoteLineItems_1697818" xlink:to="loc_slrc_InvestmentCompanyDistributableEarning_1697821" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyDistributableEarningsLossPostOctoberCapitalLosses" xlink:label="loc_slrc_InvestmentCompanyDistributableEarningsLossPostOctoberCapitalLosses_1697822"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsOwnedFederalIncomeTaxNoteLineItems_1697818" xlink:to="loc_slrc_InvestmentCompanyDistributableEarningsLossPostOctoberCapitalLosses_1697822" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedCapitalLossCarryforward" xlink:label="loc_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedCapitalLossCarryforward_1697823"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsOwnedFederalIncomeTaxNoteLineItems_1697818" xlink:to="loc_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedCapitalLossCarryforward_1697823" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyDistributableEarningsLossOtherBookTaxTemporaryDifferences" xlink:label="loc_slrc_InvestmentCompanyDistributableEarningsLossOtherBookTaxTemporaryDifferences_1697824"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsOwnedFederalIncomeTaxNoteLineItems_1697818" xlink:to="loc_slrc_InvestmentCompanyDistributableEarningsLossOtherBookTaxTemporaryDifferences_1697824" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:label="loc_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_1697825"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsOwnedFederalIncomeTaxNoteLineItems_1697818" xlink:to="loc_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_1697825" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyTaxAccumulatedLoss" xlink:label="loc_slrc_InvestmentCompanyTaxAccumulatedLoss_1697975"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsOwnedFederalIncomeTaxNoteLineItems_1697818" xlink:to="loc_slrc_InvestmentCompanyTaxAccumulatedLoss_1697975" use="optional" order="9"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/IncomeTaxInformationAndDistributionsToStockholdersAndOtherTaxInformationAdditionalInformationDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697830"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_1697829"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697830" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_1697829" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease_1697831"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697830" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease_1697831" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_1697832"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697830" xlink:to="loc_us-gaap_UnrecognizedTaxBenefits_1697832" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLossCarryforwardsLimitationsOnUse" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLimitationsOnUse_1697833"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697830" xlink:to="loc_us-gaap_OperatingLossCarryforwardsLimitationsOnUse_1697833" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyDividendDistributionEligibleForQualifiedDividendIncomeTreatmentOrTheDividendsReceivedDeductionForCorporateStockholdersPercent" xlink:label="loc_slrc_InvestmentCompanyDividendDistributionEligibleForQualifiedDividendIncomeTreatmentOrTheDividendsReceivedDeductionForCorporateStockholdersPercent_1697834"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697830" xlink:to="loc_slrc_InvestmentCompanyDividendDistributionEligibleForQualifiedDividendIncomeTreatmentOrTheDividendsReceivedDeductionForCorporateStockholdersPercent_1697834" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyDividendDistributionInterestRelatedDividendsPercent" xlink:label="loc_slrc_InvestmentCompanyDividendDistributionInterestRelatedDividendsPercent_1697836"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697830" xlink:to="loc_slrc_InvestmentCompanyDividendDistributionInterestRelatedDividendsPercent_1697836" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentCompanyDividendDistributionShortTermCapitalGainsPercent" xlink:label="loc_slrc_InvestmentCompanyDividendDistributionShortTermCapitalGainsPercent_1697837"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1697830" xlink:to="loc_slrc_InvestmentCompanyDividendDistributionShortTermCapitalGainsPercent_1697837" use="optional" order="7"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/SlrCreditSolutionsAdditionalInformationDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_1435875"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_1435744"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1435875" xlink:to="loc_us-gaap_StatementTable_1435744" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_1435803"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1435744" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_1435803" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_1435805"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_1435803" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_1435805" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_1435805_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_1435803" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_1435805_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrBusinessCreditFacilityMember" xlink:label="loc_slrc_SlrBusinessCreditFacilityMember_1435807"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_1435805" xlink:to="loc_slrc_SlrBusinessCreditFacilityMember_1435807" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1435810"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1435744" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1435810" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1435811"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1435810" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1435811" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1435811_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1435810" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1435811_default" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CrystalFinancialMember" xlink:label="loc_slrc_CrystalFinancialMember_1435816"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_1435811" xlink:to="loc_slrc_CrystalFinancialMember_1435816" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CrystalCapitalFinancialHoldingsLlcMember" xlink:label="loc_slrc_CrystalCapitalFinancialHoldingsLlcMember_1694502"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_1435811" xlink:to="loc_slrc_CrystalCapitalFinancialHoldingsLlcMember_1694502" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_1435820"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1435744" xlink:to="loc_us-gaap_CreditFacilityAxis_1435820" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_1435822"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_1435820" xlink:to="loc_us-gaap_CreditFacilityDomain_1435822" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_1435822_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_1435820" xlink:to="loc_us-gaap_CreditFacilityDomain_1435822_default" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_1435823"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_1435822" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_1435823" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_1435878"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1435875" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_1435878" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_1435880"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1435875" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_1435880" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_NumberOfLoanInBusinessCredit" xlink:label="loc_slrc_NumberOfLoanInBusinessCredit_1436748"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1435875" xlink:to="loc_slrc_NumberOfLoanInBusinessCredit_1436748" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_1435891"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1435875" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_1435891" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_1435893"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1435875" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_1435893" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LineOfCreditFacilityCommitmentsAmount" xlink:label="loc_slrc_LineOfCreditFacilityCommitmentsAmount_1435894"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1435875" xlink:to="loc_slrc_LineOfCreditFacilityCommitmentsAmount_1435894" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_NumberOfFundedCommitment" xlink:label="loc_slrc_NumberOfFundedCommitment_1436750"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1435875" xlink:to="loc_slrc_NumberOfFundedCommitment_1436750" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_NumberOfIssuerInBusinessCredit" xlink:label="loc_slrc_NumberOfIssuerInBusinessCredit_1436747"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1435875" xlink:to="loc_slrc_NumberOfIssuerInBusinessCredit_1436747" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_1435944"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1435875" xlink:to="loc_us-gaap_LineOfCredit_1435944" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_1435947"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1435875" xlink:to="loc_us-gaap_Assets_1435947" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:label="loc_us-gaap_LineOfCreditFacilityAverageOutstandingAmount_1435985"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1435875" xlink:to="loc_us-gaap_LineOfCreditFacilityAverageOutstandingAmount_1435985" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_1436024"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1435875" xlink:to="loc_us-gaap_NetIncomeLoss_1436024" use="optional" order="26"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_GrossIncome" xlink:label="loc_slrc_GrossIncome_1436041"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1435875" xlink:to="loc_slrc_GrossIncome_1436041" use="optional" order="27"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_1436933"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1435875" xlink:to="loc_us-gaap_LongTermDebt_1436933" use="optional" order="28"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/SlrEquipmentFinanceAdditionalInformationDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_1435767"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_1435767" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1435783"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_1435767" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1435783" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1435784"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1435783" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1435784" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1435784_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1435783" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1435784_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrEquipmentFinanceMember" xlink:label="loc_slrc_SlrEquipmentFinanceMember_1435792"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_1435784" xlink:to="loc_slrc_SlrEquipmentFinanceMember_1435792" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_1435812"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_1435812" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentAggregateCost" xlink:label="loc_us-gaap_EquityMethodInvestmentAggregateCost_1435817"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_us-gaap_EquityMethodInvestmentAggregateCost_1435817" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_EquityMethodInvestmentAggregateEquityInvestment" xlink:label="loc_slrc_EquityMethodInvestmentAggregateEquityInvestment_1435843"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_slrc_EquityMethodInvestmentAggregateEquityInvestment_1435843" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_EquityMethodInvestmentAggregateInvestmentInInvesteeLeasesAndLoansHeld" xlink:label="loc_slrc_EquityMethodInvestmentAggregateInvestmentInInvesteeLeasesAndLoansHeld_1436096"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_slrc_EquityMethodInvestmentAggregateInvestmentInInvesteeLeasesAndLoansHeld_1436096" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_1436099"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_1436099" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LineOfCreditFacilityMaximumBorrowingCapacityWithAccordionFeature" xlink:label="loc_slrc_LineOfCreditFacilityMaximumBorrowingCapacityWithAccordionFeature_1436121"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_slrc_LineOfCreditFacilityMaximumBorrowingCapacityWithAccordionFeature_1436121" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertySubjectToOrAvailableForOperatingLeaseNumberOfUnits" xlink:label="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseNumberOfUnits_1436126"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseNumberOfUnits_1436126" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_NumberOfCustomers" xlink:label="loc_slrc_NumberOfCustomers_1436133"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_slrc_NumberOfCustomers_1436133" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetInvestmentInLease" xlink:label="loc_us-gaap_NetInvestmentInLease_1436144"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_us-gaap_NetInvestmentInLease_1436144" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertySubjectToOrAvailableForOperatingLeaseNet" xlink:label="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseNet_1436161"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseNet_1436161" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_EquipmentBackedLeasesAndLoansLargestPositionOutstanding" xlink:label="loc_slrc_EquipmentBackedLeasesAndLoansLargestPositionOutstanding_1436168"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_slrc_EquipmentBackedLeasesAndLoansLargestPositionOutstanding_1436168" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_EquipmentBackedLeasesAndLoansaverageExposurePerCustomer" xlink:label="loc_slrc_EquipmentBackedLeasesAndLoansaverageExposurePerCustomer_1436183"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_slrc_EquipmentBackedLeasesAndLoansaverageExposurePerCustomer_1436183" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_1436185"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_us-gaap_LongTermDebt_1436185" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_1436186"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_us-gaap_NetIncomeLoss_1436186" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_GrossIncome" xlink:label="loc_slrc_GrossIncome_1436188"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_slrc_GrossIncome_1436188" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityExpirationDate1" xlink:label="loc_us-gaap_LineOfCreditFacilityExpirationDate1_1436233"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1435768" xlink:to="loc_us-gaap_LineOfCreditFacilityExpirationDate1_1436233" use="optional" order="21"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/KingsbridgeHoldingsLlcAdditionalInformationDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_1433579"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_1433576"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1433579" xlink:to="loc_us-gaap_StatementTable_1433576" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_1433581"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1433576" xlink:to="loc_srt_RangeAxis_1433581" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1433582"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1433581" xlink:to="loc_srt_RangeMember_1433582" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1433582_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1433581" xlink:to="loc_srt_RangeMember_1433582_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_1433583"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1433582" xlink:to="loc_srt_MaximumMember_1433583" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_1433585"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1433582" xlink:to="loc_srt_MinimumMember_1433585" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_1433577"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1433576" xlink:to="loc_us-gaap_StatementClassOfStockAxis_1433577" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1433578"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1433577" xlink:to="loc_us-gaap_ClassOfStockDomain_1433578" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1433578_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1433577" xlink:to="loc_us-gaap_ClassOfStockDomain_1433578_default" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1433590"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1433576" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1433590" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1433591"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1433590" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1433591" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1433591_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1433590" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1433591_default" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_KingsbridgeHoldingsLlcMember" xlink:label="loc_slrc_KingsbridgeHoldingsLlcMember_1433597"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_1433591" xlink:to="loc_slrc_KingsbridgeHoldingsLlcMember_1433597" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1694558"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1433576" xlink:to="loc_dei_LegalEntityAxis_1694558" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1694559"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1694558" xlink:to="loc_dei_EntityDomain_1694559" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1694559_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1694558" xlink:to="loc_dei_EntityDomain_1694559_default" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_KbhtMember" xlink:label="loc_slrc_KbhtMember_1694560"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1694559" xlink:to="loc_slrc_KbhtMember_1694560" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_1433598"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433579" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_1433598" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestments" xlink:label="loc_us-gaap_EquityMethodInvestments_1433600"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433579" xlink:to="loc_us-gaap_EquityMethodInvestments_1433600" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireInvestments_1433602"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433579" xlink:to="loc_us-gaap_PaymentsToAcquireInvestments_1433602" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromIssuanceOfUnsecuredDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfUnsecuredDebt_1433603"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433579" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfUnsecuredDebt_1433603" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_1433605"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433579" xlink:to="loc_us-gaap_Assets_1433605" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_RecourseDebt" xlink:label="loc_slrc_RecourseDebt_1436703"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433579" xlink:to="loc_slrc_RecourseDebt_1436703" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_1433606"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433579" xlink:to="loc_us-gaap_LongTermDebt_1433606" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_1433609"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433579" xlink:to="loc_us-gaap_NetIncomeLoss_1433609" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_GrossIncome" xlink:label="loc_slrc_GrossIncome_1433610"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433579" xlink:to="loc_slrc_GrossIncome_1433610" use="optional" order="26"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/SlrHealthcareAblAdditionalInformationDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_1433820"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_1433817"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1433820" xlink:to="loc_us-gaap_StatementTable_1433817" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1433827"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1433817" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1433827" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1433828"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1433827" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1433828" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1433828_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1433827" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1433828_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrHealthcareAblMember" xlink:label="loc_slrc_SlrHealthcareAblMember_1433829"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_1433828" xlink:to="loc_slrc_SlrHealthcareAblMember_1433829" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrEquipmentFinanceMember" xlink:label="loc_slrc_SlrEquipmentFinanceMember_1698121"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_1433828" xlink:to="loc_slrc_SlrEquipmentFinanceMember_1698121" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_1433818"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1433817" xlink:to="loc_us-gaap_StatementClassOfStockAxis_1433818" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1433819"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1433818" xlink:to="loc_us-gaap_ClassOfStockDomain_1433819" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1433819_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1433818" xlink:to="loc_us-gaap_ClassOfStockDomain_1433819_default" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_1433830"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1433817" xlink:to="loc_srt_RangeAxis_1433830" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1433831"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1433830" xlink:to="loc_srt_RangeMember_1433831" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1433831_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1433830" xlink:to="loc_srt_RangeMember_1433831_default" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_1433832"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1433831" xlink:to="loc_srt_MaximumMember_1433832" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_1433833"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1433831" xlink:to="loc_srt_MinimumMember_1433833" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsAxis" xlink:label="loc_us-gaap_OtherCommitmentsAxis_1433863"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1433817" xlink:to="loc_us-gaap_OtherCommitmentsAxis_1433863" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsDomain" xlink:label="loc_us-gaap_OtherCommitmentsDomain_1433865"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherCommitmentsAxis_1433863" xlink:to="loc_us-gaap_OtherCommitmentsDomain_1433865" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsDomain" xlink:label="loc_us-gaap_OtherCommitmentsDomain_1433865_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherCommitmentsAxis_1433863" xlink:to="loc_us-gaap_OtherCommitmentsDomain_1433865_default" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SeniorSecuredCommitmentsMember" xlink:label="loc_slrc_SeniorSecuredCommitmentsMember_1433893"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_1433865" xlink:to="loc_slrc_SeniorSecuredCommitmentsMember_1433893" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_1436643"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1433817" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_1436643" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_1436644"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_1436643" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_1436644" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_1436644_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_1436643" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_1436644_default" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrHealthcareAblCreditMember" xlink:label="loc_slrc_SlrHealthcareAblCreditMember_1436645"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_1436644" xlink:to="loc_slrc_SlrHealthcareAblCreditMember_1436645" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_1694554"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1433817" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_1694554" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_1694555"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_1694554" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_1694555" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_1694555_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_1694554" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_1694555_default" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestments" xlink:label="loc_us-gaap_EquityMethodInvestments_1433821"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433820" xlink:to="loc_us-gaap_EquityMethodInvestments_1433821" use="optional" order="26"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_1433822"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433820" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_1433822" use="optional" order="27"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_1433834"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433820" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_1433834" use="optional" order="28"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityExpirationDate1" xlink:label="loc_us-gaap_LineOfCreditFacilityExpirationDate1_1433836"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433820" xlink:to="loc_us-gaap_LineOfCreditFacilityExpirationDate1_1433836" use="optional" order="29"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_1433888"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433820" xlink:to="loc_us-gaap_CommitmentsAndContingencies_1433888" use="optional" order="30"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CommitmentFundedAmount" xlink:label="loc_slrc_CommitmentFundedAmount_1433889"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433820" xlink:to="loc_slrc_CommitmentFundedAmount_1433889" use="optional" order="31"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_1433891"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433820" xlink:to="loc_us-gaap_Assets_1433891" use="optional" order="32"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_NumberOfIssuerInBusinessCredit" xlink:label="loc_slrc_NumberOfIssuerInBusinessCredit_1436622"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433820" xlink:to="loc_slrc_NumberOfIssuerInBusinessCredit_1436622" use="optional" order="33"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_1433898"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433820" xlink:to="loc_us-gaap_LineOfCredit_1433898" use="optional" order="34"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_1433900"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433820" xlink:to="loc_us-gaap_NetIncomeLoss_1433900" use="optional" order="35"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_GrossIncome" xlink:label="loc_slrc_GrossIncome_1433901"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433820" xlink:to="loc_slrc_GrossIncome_1433901" use="optional" order="36"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_1698125"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433820" xlink:to="loc_us-gaap_LongTermDebt_1698125" use="optional" order="37"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LineOfCreditFacilityMaximumBorrowingCapacityWithAccordionFeature" xlink:label="loc_slrc_LineOfCreditFacilityMaximumBorrowingCapacityWithAccordionFeature_1698122"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433820" xlink:to="loc_slrc_LineOfCreditFacilityMaximumBorrowingCapacityWithAccordionFeature_1698122" use="optional" order="38"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/SlrBusinessCreditAdditionalInformationDetails">
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrBusinessCreditLineItems" xlink:label="loc_slrc_SlrBusinessCreditLineItems_1431926"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrBusinessCreditTable" xlink:label="loc_slrc_SlrBusinessCreditTable_1431918"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_slrc_SlrBusinessCreditLineItems_1431926" xlink:to="loc_slrc_SlrBusinessCreditTable_1431918" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1431919"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_slrc_SlrBusinessCreditTable_1431918" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1431919" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1431920"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1431919" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1431920" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1431920_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1431919" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1431920_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_NorthMillCapitalLlcMember" xlink:label="loc_slrc_NorthMillCapitalLlcMember_1431923"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_1431920" xlink:to="loc_slrc_NorthMillCapitalLlcMember_1431923" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_EspSscCorporationMember" xlink:label="loc_slrc_EspSscCorporationMember_1431924"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_1431920" xlink:to="loc_slrc_EspSscCorporationMember_1431924" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SummitFinancialResourcesMember" xlink:label="loc_slrc_SummitFinancialResourcesMember_1433468"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_1431920" xlink:to="loc_slrc_SummitFinancialResourcesMember_1433468" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1433469"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_slrc_SlrBusinessCreditTable_1431918" xlink:to="loc_dei_LegalEntityAxis_1433469" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1433470"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1433469" xlink:to="loc_dei_EntityDomain_1433470" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1433470_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1433469" xlink:to="loc_dei_EntityDomain_1433470_default" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_NmHoldcoMember" xlink:label="loc_slrc_NmHoldcoMember_1433471"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1433470" xlink:to="loc_slrc_NmHoldcoMember_1433471" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_1433472"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_slrc_SlrBusinessCreditTable_1431918" xlink:to="loc_us-gaap_CreditFacilityAxis_1433472" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_1433473"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_1433472" xlink:to="loc_us-gaap_CreditFacilityDomain_1433473" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_1433473_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_1433472" xlink:to="loc_us-gaap_CreditFacilityDomain_1433473_default" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_NmcsCreditFacilityMember" xlink:label="loc_slrc_NmcsCreditFacilityMember_1433474"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_1433473" xlink:to="loc_slrc_NmcsCreditFacilityMember_1433474" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SunsMember" xlink:label="loc_slrc_SunsMember_1433478"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_1433473" xlink:to="loc_slrc_SunsMember_1433478" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_NmcSeniorCreditFacilityMember" xlink:label="loc_slrc_NmcSeniorCreditFacilityMember_1433488"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_1433473" xlink:to="loc_slrc_NmcSeniorCreditFacilityMember_1433488" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_1433475"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_slrc_SlrBusinessCreditTable_1431918" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_1433475" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1433476"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1433475" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1433476" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1433476_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1433475" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1433476_default" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_FastPayPartnersLlcMember" xlink:label="loc_slrc_FastPayPartnersLlcMember_1433477"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1433476" xlink:to="loc_slrc_FastPayPartnersLlcMember_1433477" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsAxis" xlink:label="loc_us-gaap_OtherCommitmentsAxis_1433484"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_slrc_SlrBusinessCreditTable_1431918" xlink:to="loc_us-gaap_OtherCommitmentsAxis_1433484" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsDomain" xlink:label="loc_us-gaap_OtherCommitmentsDomain_1433485"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherCommitmentsAxis_1433484" xlink:to="loc_us-gaap_OtherCommitmentsDomain_1433485" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsDomain" xlink:label="loc_us-gaap_OtherCommitmentsDomain_1433485_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherCommitmentsAxis_1433484" xlink:to="loc_us-gaap_OtherCommitmentsDomain_1433485_default" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SeniorSecuredCommitmentsMember" xlink:label="loc_slrc_SeniorSecuredCommitmentsMember_1433486"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_1433485" xlink:to="loc_slrc_SeniorSecuredCommitmentsMember_1433486" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_1433496"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_slrc_SlrBusinessCreditTable_1431918" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_1433496" use="optional" order="26"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_1433497"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_1433496" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_1433497" use="optional" order="27"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_1433497_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_1433496" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_1433497_default" use="optional" order="28"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrBusinessCreditMember" xlink:label="loc_slrc_SlrBusinessCreditMember_1433498"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_1433497" xlink:to="loc_slrc_SlrBusinessCreditMember_1433498" use="optional" order="29"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_1431927"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_SlrBusinessCreditLineItems_1431926" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_1431927" use="optional" order="30"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestments" xlink:label="loc_us-gaap_EquityMethodInvestments_1431928"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_SlrBusinessCreditLineItems_1431926" xlink:to="loc_us-gaap_EquityMethodInvestments_1431928" use="optional" order="31"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PercentageOfEquityInterestContributedToAnotherEntity" xlink:label="loc_slrc_PercentageOfEquityInterestContributedToAnotherEntity_1433479"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_SlrBusinessCreditLineItems_1431926" xlink:to="loc_slrc_PercentageOfEquityInterestContributedToAnotherEntity_1433479" use="optional" order="32"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_1433480"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_SlrBusinessCreditLineItems_1431926" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_1433480" use="optional" order="33"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_1433481"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_SlrBusinessCreditLineItems_1431926" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_1433481" use="optional" order="34"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_1433482"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_SlrBusinessCreditLineItems_1431926" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_1433482" use="optional" order="35"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_1433489"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_SlrBusinessCreditLineItems_1431926" xlink:to="loc_us-gaap_CommitmentsAndContingencies_1433489" use="optional" order="36"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CommitmentFundedAmount" xlink:label="loc_slrc_CommitmentFundedAmount_1433490"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_SlrBusinessCreditLineItems_1431926" xlink:to="loc_slrc_CommitmentFundedAmount_1433490" use="optional" order="37"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_1433491"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_SlrBusinessCreditLineItems_1431926" xlink:to="loc_us-gaap_Assets_1433491" use="optional" order="38"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_NumberOfIssuerInBusinessCredit" xlink:label="loc_slrc_NumberOfIssuerInBusinessCredit_1436614"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_SlrBusinessCreditLineItems_1431926" xlink:to="loc_slrc_NumberOfIssuerInBusinessCredit_1436614" use="optional" order="39"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_1433494"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_SlrBusinessCreditLineItems_1431926" xlink:to="loc_us-gaap_LineOfCredit_1433494" use="optional" order="40"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityExpirationDate1" xlink:label="loc_us-gaap_LineOfCreditFacilityExpirationDate1_1433495"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_SlrBusinessCreditLineItems_1431926" xlink:to="loc_us-gaap_LineOfCreditFacilityExpirationDate1_1433495" use="optional" order="41"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_1433499"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_SlrBusinessCreditLineItems_1431926" xlink:to="loc_us-gaap_NetIncomeLoss_1433499" use="optional" order="42"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_GrossIncome" xlink:label="loc_slrc_GrossIncome_1433500"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_slrc_SlrBusinessCreditLineItems_1431926" xlink:to="loc_slrc_GrossIncome_1433500" use="optional" order="43"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/CommitmentsAndContingenciesAdditionalInformationDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsLineItems" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_1436154"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsTable" xlink:label="loc_us-gaap_OtherCommitmentsTable_1436151"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_1436154" xlink:to="loc_us-gaap_OtherCommitmentsTable_1436151" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsAxis" xlink:label="loc_us-gaap_OtherCommitmentsAxis_1436152"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_1436151" xlink:to="loc_us-gaap_OtherCommitmentsAxis_1436152" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsDomain" xlink:label="loc_us-gaap_OtherCommitmentsDomain_1436153"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherCommitmentsAxis_1436152" xlink:to="loc_us-gaap_OtherCommitmentsDomain_1436153" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsDomain" xlink:label="loc_us-gaap_OtherCommitmentsDomain_1436153_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherCommitmentsAxis_1436152" xlink:to="loc_us-gaap_OtherCommitmentsDomain_1436153_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1697969"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_1436151" xlink:to="loc_dei_LegalEntityAxis_1697969" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1697970"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1697969" xlink:to="loc_dei_EntityDomain_1697970" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1697970_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1697969" xlink:to="loc_dei_EntityDomain_1697970_default" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitment" xlink:label="loc_us-gaap_OtherCommitment_1436162"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_1436154" xlink:to="loc_us-gaap_OtherCommitment_1436162" use="optional" order="8"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/CommitmentsAndContingenciesSummaryOfUnfundedDebtAndEquityCommitmentsDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsLineItems" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_1436291"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsTable" xlink:label="loc_us-gaap_OtherCommitmentsTable_1436222"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_1436291" xlink:to="loc_us-gaap_OtherCommitmentsTable_1436222" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsAxis" xlink:label="loc_us-gaap_OtherCommitmentsAxis_1436224"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_1436222" xlink:to="loc_us-gaap_OtherCommitmentsAxis_1436224" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsDomain" xlink:label="loc_us-gaap_OtherCommitmentsDomain_1436225"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherCommitmentsAxis_1436224" xlink:to="loc_us-gaap_OtherCommitmentsDomain_1436225" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsDomain" xlink:label="loc_us-gaap_OtherCommitmentsDomain_1436225_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherCommitmentsAxis_1436224" xlink:to="loc_us-gaap_OtherCommitmentsDomain_1436225_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_UnfundedDebtAndEquityCommitmentsMember" xlink:label="loc_slrc_UnfundedDebtAndEquityCommitmentsMember_1436227"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_1436225" xlink:to="loc_slrc_UnfundedDebtAndEquityCommitmentsMember_1436227" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1436231"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_1436222" xlink:to="loc_dei_LegalEntityAxis_1436231" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1436232"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1436231" xlink:to="loc_dei_EntityDomain_1436232" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1436232_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1436231" xlink:to="loc_dei_EntityDomain_1436232_default" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrCreditSolutionsMember" xlink:label="loc_slrc_SlrCreditSolutionsMember_1436236"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_SlrCreditSolutionsMember_1436236" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_OrthopedicCarePartnersManagementLlcMember" xlink:label="loc_slrc_OrthopedicCarePartnersManagementLlcMember_1696417"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_OrthopedicCarePartnersManagementLlcMember_1696417" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SouthernOrthodonticPartnersManagementLlcMember" xlink:label="loc_slrc_SouthernOrthodonticPartnersManagementLlcMember_1569883"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_SouthernOrthodonticPartnersManagementLlcMember_1569883" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ArdelyxIncMember" xlink:label="loc_slrc_ArdelyxIncMember_1569877"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_ArdelyxIncMember_1569877" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CvausaManagementLlcMember" xlink:label="loc_slrc_CvausaManagementLlcMember_1698054"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_CvausaManagementLlcMember_1698054" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_BdgMediaInc.Member" xlink:label="loc_slrc_BdgMediaInc.Member_1696412"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_BdgMediaInc.Member_1696412" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_IcimsInc.Member" xlink:label="loc_slrc_IcimsInc.Member_1696410"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_IcimsInc.Member_1696410" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_RetinaMidcoIncMember" xlink:label="loc_slrc_RetinaMidcoIncMember_1698056"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_RetinaMidcoIncMember_1698056" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AlkemeIntermediateHoldingsLLCMember" xlink:label="loc_slrc_AlkemeIntermediateHoldingsLLCMember_1698058"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_AlkemeIntermediateHoldingsLLCMember_1698058" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SparMarketingForceInc.Member" xlink:label="loc_slrc_SparMarketingForceInc.Member_1696418"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_SparMarketingForceInc.Member_1696418" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CopperRiverSeafoodsInc.Member" xlink:label="loc_slrc_CopperRiverSeafoodsInc.Member_1696416"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_CopperRiverSeafoodsInc.Member_1696416" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrSeniorLendingProgramLlcMember" xlink:label="loc_slrc_SlrSeniorLendingProgramLlcMember_1698060"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_SlrSeniorLendingProgramLlcMember_1698060" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LegacyServicePartnersLLCMember" xlink:label="loc_slrc_LegacyServicePartnersLLCMember_1698062"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_LegacyServicePartnersLLCMember_1698062" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PeterC.FoyAssociatesInsuranceServicesLlcMember" xlink:label="loc_slrc_PeterC.FoyAssociatesInsuranceServicesLlcMember_1569873"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_PeterC.FoyAssociatesInsuranceServicesLlcMember_1569873" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_WestNRParentIncMember" xlink:label="loc_slrc_WestNRParentIncMember_1698063"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_WestNRParentIncMember_1698063" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LuxuryAssetCapitalLlcMember" xlink:label="loc_slrc_LuxuryAssetCapitalLlcMember_1696414"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_LuxuryAssetCapitalLlcMember_1696414" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_OneTouchDirectLlcMember" xlink:label="loc_slrc_OneTouchDirectLlcMember_1436268"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_OneTouchDirectLlcMember_1436268" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_DeepintentInc.Member" xlink:label="loc_slrc_DeepintentInc.Member_1697790"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_DeepintentInc.Member_1697790" use="optional" order="26"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_FoundationConsumerBrandsLlcMember" xlink:label="loc_slrc_FoundationConsumerBrandsLlcMember_1436283"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_FoundationConsumerBrandsLlcMember_1436283" use="optional" order="27"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_UnitedDigestiveMSOParentLLCMember" xlink:label="loc_slrc_UnitedDigestiveMSOParentLLCMember_1698064"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_UnitedDigestiveMSOParentLLCMember_1698064" use="optional" order="28"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_KaseyaIncMember" xlink:label="loc_slrc_KaseyaIncMember_1569881"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_KaseyaIncMember_1569881" use="optional" order="29"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TheTownsendCompanyLLCMember" xlink:label="loc_slrc_TheTownsendCompanyLLCMember_1698065"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_TheTownsendCompanyLLCMember_1698065" use="optional" order="30"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_VertosMedicalInc.Member" xlink:label="loc_slrc_VertosMedicalInc.Member_1698066"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_VertosMedicalInc.Member_1698066" use="optional" order="31"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AMFLeveredIILLCMember" xlink:label="loc_slrc_AMFLeveredIILLCMember_1698067"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_AMFLeveredIILLCMember_1698067" use="optional" order="32"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_UvpManagementLlcMember" xlink:label="loc_slrc_UvpManagementLlcMember_1698068"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_UvpManagementLlcMember_1698068" use="optional" order="33"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_KidDistroHoldingsLlcDistroKidMember" xlink:label="loc_slrc_KidDistroHoldingsLlcDistroKidMember_1436279"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_KidDistroHoldingsLlcDistroKidMember_1436279" use="optional" order="34"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ErieConstructionMidwestLlcMember" xlink:label="loc_slrc_ErieConstructionMidwestLlcMember_1569889"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_ErieConstructionMidwestLlcMember_1569889" use="optional" order="35"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_UltimateBakedGoodsMidcoLlcMember" xlink:label="loc_slrc_UltimateBakedGoodsMidcoLlcMember_1436289"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_UltimateBakedGoodsMidcoLlcMember_1436289" use="optional" order="36"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_BasicFunInc.Member" xlink:label="loc_slrc_BasicFunInc.Member_1436278"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_BasicFunInc.Member_1436278" use="optional" order="37"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrEquipmentFinanceMember" xlink:label="loc_slrc_SlrEquipmentFinanceMember_1436285"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_SlrEquipmentFinanceMember_1436285" use="optional" order="38"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_BaysideOpcoLLCMember" xlink:label="loc_slrc_BaysideOpcoLLCMember_1698069"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_BaysideOpcoLLCMember_1698069" use="optional" order="39"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SunmedGroupHoldingsLlcMember" xlink:label="loc_slrc_SunmedGroupHoldingsLlcMember_1436284"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_SunmedGroupHoldingsLlcMember_1436284" use="optional" order="40"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_UrologyManagementHoldingsIncMember" xlink:label="loc_slrc_UrologyManagementHoldingsIncMember_1698070"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_UrologyManagementHoldingsIncMember_1698070" use="optional" order="41"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrHealthcareAblMember" xlink:label="loc_slrc_SlrHealthcareAblMember_1569887"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_SlrHealthcareAblMember_1569887" use="optional" order="42"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_RxsenseHoldingsLlcMember" xlink:label="loc_slrc_RxsenseHoldingsLlcMember_1569888"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_RxsenseHoldingsLlcMember_1569888" use="optional" order="43"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TilleyDistributionIncMember" xlink:label="loc_slrc_TilleyDistributionIncMember_1569894"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_TilleyDistributionIncMember_1569894" use="optional" order="44"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_GsmAcquisitionCorpMember" xlink:label="loc_slrc_GsmAcquisitionCorpMember_1569891"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_GsmAcquisitionCorpMember_1569891" use="optional" order="45"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ScpEyeCareLlcMember" xlink:label="loc_slrc_ScpEyeCareLlcMember_1697791"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_ScpEyeCareLlcMember_1697791" use="optional" order="46"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MedrinaLLCMember" xlink:label="loc_slrc_MedrinaLLCMember_1698074"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_MedrinaLLCMember_1698074" use="optional" order="47"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PinnacleTreatmentCentersInc.Member" xlink:label="loc_slrc_PinnacleTreatmentCentersInc.Member_1436286"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_PinnacleTreatmentCentersInc.Member_1436286" use="optional" order="48"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_HighStreetBuyerIncMember" xlink:label="loc_slrc_HighStreetBuyerIncMember_1569893"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_HighStreetBuyerIncMember_1569893" use="optional" order="49"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_EnsHoldingsIiiCorpLlcMember" xlink:label="loc_slrc_EnsHoldingsIiiCorpLlcMember_1697793"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_EnsHoldingsIiiCorpLlcMember_1697793" use="optional" order="50"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CcSagHoldingsCorp.SpectrumAutomotiveMember" xlink:label="loc_slrc_CcSagHoldingsCorp.SpectrumAutomotiveMember_1436245"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_CcSagHoldingsCorp.SpectrumAutomotiveMember_1436245" use="optional" order="51"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CrewlineBuyerIncMember" xlink:label="loc_slrc_CrewlineBuyerIncMember_1698080"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_CrewlineBuyerIncMember_1698080" use="optional" order="52"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ExactcareParentIncMember" xlink:label="loc_slrc_ExactcareParentIncMember_1698081"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_ExactcareParentIncMember_1698081" use="optional" order="53"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AllStatesAgPartsLLCMember" xlink:label="loc_slrc_AllStatesAgPartsLLCMember_1698084"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_AllStatesAgPartsLLCMember_1698084" use="optional" order="54"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_WCI-BXCPurchaserLLCMember" xlink:label="loc_slrc_WCI-BXCPurchaserLLCMember_1698083"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_WCI-BXCPurchaserLLCMember_1698083" use="optional" order="55"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_VesscoMidcoHoldingsLlcMember" xlink:label="loc_slrc_VesscoMidcoHoldingsLlcMember_1569878"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_VesscoMidcoHoldingsLlcMember_1569878" use="optional" order="56"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TaucManagementLlcMember" xlink:label="loc_slrc_TaucManagementLlcMember_1569895"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_TaucManagementLlcMember_1569895" use="optional" order="57"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_OutsetMedicalInc.Member" xlink:label="loc_slrc_OutsetMedicalInc.Member_1697788"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_OutsetMedicalInc.Member_1697788" use="optional" order="58"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ApeelTechnologyIncMember" xlink:label="loc_slrc_ApeelTechnologyIncMember_1569868"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_ApeelTechnologyIncMember_1569868" use="optional" order="59"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_HumanInterestIncMember" xlink:label="loc_slrc_HumanInterestIncMember_1569869"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_HumanInterestIncMember_1569869" use="optional" order="60"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_GlookoInc.Member" xlink:label="loc_slrc_GlookoInc.Member_1436261"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_GlookoInc.Member_1436261" use="optional" order="61"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_WorldInsuranceAssociatesLlcMember" xlink:label="loc_slrc_WorldInsuranceAssociatesLlcMember_1569867"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_WorldInsuranceAssociatesLlcMember_1569867" use="optional" order="62"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SpectrumPharmaceuticalsInc.Member" xlink:label="loc_slrc_SpectrumPharmaceuticalsInc.Member_1696411"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_SpectrumPharmaceuticalsInc.Member_1696411" use="optional" order="63"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ArcutisBiotherapeuticsInc.Member" xlink:label="loc_slrc_ArcutisBiotherapeuticsInc.Member_1436259"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_ArcutisBiotherapeuticsInc.Member_1436259" use="optional" order="64"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AtriaWealthSolutionsIncMember" xlink:label="loc_slrc_AtriaWealthSolutionsIncMember_1436276"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_AtriaWealthSolutionsIncMember_1436276" use="optional" order="65"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AccessionRiskManagementGroupIncMember" xlink:label="loc_slrc_AccessionRiskManagementGroupIncMember_1698095"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_AccessionRiskManagementGroupIncMember_1698095" use="optional" order="66"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CerapedicsInc.Member" xlink:label="loc_slrc_CerapedicsInc.Member_1697787"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_CerapedicsInc.Member_1697787" use="optional" order="67"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MauricesIncorporatedMember" xlink:label="loc_slrc_MauricesIncorporatedMember_1436271"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_MauricesIncorporatedMember_1436271" use="optional" order="68"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MeditrinaInc.Member" xlink:label="loc_slrc_MeditrinaInc.Member_1697789"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_MeditrinaInc.Member_1697789" use="optional" order="69"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PlasticsManagementLlcMember" xlink:label="loc_slrc_PlasticsManagementLlcMember_1569882"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_PlasticsManagementLlcMember_1569882" use="optional" order="70"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PediatricHomeRespiratoryServicesLlcMember" xlink:label="loc_slrc_PediatricHomeRespiratoryServicesLlcMember_1696415"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_PediatricHomeRespiratoryServicesLlcMember_1696415" use="optional" order="71"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_IvyFertilityServicesLlcMember" xlink:label="loc_slrc_IvyFertilityServicesLlcMember_1436246"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_IvyFertilityServicesLlcMember_1436246" use="optional" order="72"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CompositeTechnologyAcquisitionCorpMember" xlink:label="loc_slrc_CompositeTechnologyAcquisitionCorpMember_1569890"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_CompositeTechnologyAcquisitionCorpMember_1569890" use="optional" order="73"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_NacHoldingsCorporationMember" xlink:label="loc_slrc_NacHoldingsCorporationMember_1436274"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_NacHoldingsCorporationMember_1436274" use="optional" order="74"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MontefioreNyackHospitalMember" xlink:label="loc_slrc_MontefioreNyackHospitalMember_1697792"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_MontefioreNyackHospitalMember_1697792" use="optional" order="75"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_EnverusHoldingsIncMember" xlink:label="loc_slrc_EnverusHoldingsIncMember_1569886"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_EnverusHoldingsIncMember_1569886" use="optional" order="76"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AmericanTeleconferencingServicesLtd.Member" xlink:label="loc_slrc_AmericanTeleconferencingServicesLtd.Member_1436287"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_AmericanTeleconferencingServicesLtd.Member_1436287" use="optional" order="77"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_BaymarkHealthServicesIncMember" xlink:label="loc_slrc_BaymarkHealthServicesIncMember_1569892"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1436232" xlink:to="loc_slrc_BaymarkHealthServicesIncMember_1569892" use="optional" order="78"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitment" xlink:label="loc_us-gaap_OtherCommitment_1436292"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_1436291" xlink:to="loc_us-gaap_OtherCommitment_1436292" use="optional" order="79"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/CapitalShareTransactionsSummaryOfTransactionsInCapitalStockDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_1433524"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_1433521"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1433524" xlink:to="loc_us-gaap_StatementTable_1433521" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_1433525"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1433521" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_1433525" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1433526"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1433525" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1433526" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1433526_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1433525" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1433526_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SharesIssuedInConnectionWithTheMergersMember" xlink:label="loc_slrc_SharesIssuedInConnectionWithTheMergersMember_1433530"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1433526" xlink:to="loc_slrc_SharesIssuedInConnectionWithTheMergersMember_1433530" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_1433522"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1433521" xlink:to="loc_us-gaap_StatementClassOfStockAxis_1433522" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1433523"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1433522" xlink:to="loc_us-gaap_ClassOfStockDomain_1433523" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1433523_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1433522" xlink:to="loc_us-gaap_ClassOfStockDomain_1433523_default" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_1433531"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433524" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_1433531" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodValueAcquisitions" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_1433533"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433524" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_1433533" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_1697972"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433524" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_1697972" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_1697973"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433524" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_1697973" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease_1698869"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433524" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease_1698869" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction" xlink:label="loc_us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction_1698871"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1433524" xlink:to="loc_us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction_1698871" use="optional" order="14"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/SlrSeniorLendingProgramLlcSummaryOfSslpSPortfolioDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:label="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SummaryOfInvestmentHoldingsTable" xlink:label="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697847"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697847" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentIdentifierAxis" xlink:label="loc_us-gaap_InvestmentIdentifierAxis_1699075"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697847" xlink:to="loc_us-gaap_InvestmentIdentifierAxis_1699075" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesByIndustryAxis" xlink:label="loc_us-gaap_EquitySecuritiesByIndustryAxis_1697856"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697847" xlink:to="loc_us-gaap_EquitySecuritiesByIndustryAxis_1697856" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember_1697857"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquitySecuritiesByIndustryAxis_1697856" xlink:to="loc_us-gaap_EquitySecuritiesIndustryMember_1697857" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember_1697857_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquitySecuritiesByIndustryAxis_1697856" xlink:to="loc_us-gaap_EquitySecuritiesIndustryMember_1697857_default" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1697865"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697847" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1697865" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1697866"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1697865" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1697866" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1697866_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1697865" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1697866_default" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1697944"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697847" xlink:to="loc_dei_LegalEntityAxis_1697944" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1697945"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1697944" xlink:to="loc_dei_EntityDomain_1697945" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1697945_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1697944" xlink:to="loc_dei_EntityDomain_1697945_default" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrSeniorLendingProgramLlcMember" xlink:label="loc_slrc_SlrSeniorLendingProgramLlcMember_1697946"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1697945" xlink:to="loc_slrc_SlrSeniorLendingProgramLlcMember_1697946" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentBasisSpreadVariableRate" xlink:label="loc_us-gaap_InvestmentBasisSpreadVariableRate_1698857"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_InvestmentBasisSpreadVariableRate_1698857" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeFloorInterestRate" xlink:label="loc_us-gaap_DerivativeFloorInterestRate_1697850"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_DerivativeFloorInterestRate_1697850" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentInterestRate" xlink:label="loc_us-gaap_InvestmentInterestRate_1697851"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_InvestmentInterestRate_1697851" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeMaturityDates" xlink:label="loc_us-gaap_DerivativeMaturityDates_1697852"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_DerivativeMaturityDates_1697852" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" xlink:label="loc_us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue_1697853"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue_1697853" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="loc_us-gaap_InvestmentOwnedAtCost_1697854"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_InvestmentOwnedAtCost_1697854" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="loc_us-gaap_InvestmentOwnedAtFairValue_1697855"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_InvestmentOwnedAtFairValue_1697855" use="optional" order="19"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/SlrSeniorLendingProgramLlcSummaryFinancialInformationForSslpDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CondensedFinancialStatementsCaptionsLineItems" xlink:label="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfCondensedFinancialStatementsTable" xlink:label="loc_srt_ScheduleOfCondensedFinancialStatementsTable_1697877"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_srt_ScheduleOfCondensedFinancialStatementsTable_1697877" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1697902"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ScheduleOfCondensedFinancialStatementsTable_1697877" xlink:to="loc_dei_LegalEntityAxis_1697902" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1697903"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1697902" xlink:to="loc_dei_EntityDomain_1697903" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1697903_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1697902" xlink:to="loc_dei_EntityDomain_1697903_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrSeniorLendingProgramLlcMember" xlink:label="loc_slrc_SlrSeniorLendingProgramLlcMember_1697904"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1697903" xlink:to="loc_slrc_SlrSeniorLendingProgramLlcMember_1697904" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="loc_us-gaap_InvestmentOwnedAtFairValue_1697879"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_InvestmentOwnedAtFairValue_1697879" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsAndShortTermInvestments" xlink:label="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_1697880"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_1697880" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_1697881"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_Assets_1697881" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount" xlink:label="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_1697901"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_1697901" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:label="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_1698111"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_1698111" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InterestPayableAndOtherCreditFacilityRelatedExpenses" xlink:label="loc_slrc_InterestPayableAndOtherCreditFacilityRelatedExpenses_1697882"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_slrc_InterestPayableAndOtherCreditFacilityRelatedExpenses_1697882" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_1697883"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_1697883" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_1697884"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_Liabilities_1697884" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MembersEquity" xlink:label="loc_us-gaap_MembersEquity_1697885"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_MembersEquity_1697885" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_1697886"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_1697886" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_1697887"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_InvestmentIncomeInterest_1697887" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoninterestIncome" xlink:label="loc_us-gaap_NoninterestIncome_1697888"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_NoninterestIncome_1697888" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_1697889"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_InterestExpense_1697889" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdministrativeFeesExpense" xlink:label="loc_us-gaap_AdministrativeFeesExpense_1697890"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_AdministrativeFeesExpense_1697890" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_OtherGeneralAndAdministrativeExpense_1697891"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_OtherGeneralAndAdministrativeExpense_1697891" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentIncomeInvestmentExpense" xlink:label="loc_us-gaap_InvestmentIncomeInvestmentExpense_1697892"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_InvestmentIncomeInvestmentExpense_1697892" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetInvestmentIncome" xlink:label="loc_us-gaap_NetInvestmentIncome_1697893"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_NetInvestmentIncome_1697893" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="loc_us-gaap_RealizedInvestmentGainsLosses_1697894"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_RealizedInvestmentGainsLosses_1697894" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments_1697895"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_UnrealizedGainLossOnInvestments_1697895" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency" xlink:label="loc_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency_1697896"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency_1697896" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_1697897"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1697878" xlink:to="loc_us-gaap_ProfitLoss_1697897" use="optional" order="26"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/SlrSeniorLendingProgramLlcSummaryFinancialInformationForSslpParentheticalDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CondensedFinancialStatementsCaptionsLineItems" xlink:label="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1698118"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfCondensedFinancialStatementsTable" xlink:label="loc_srt_ScheduleOfCondensedFinancialStatementsTable_1698114"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1698118" xlink:to="loc_srt_ScheduleOfCondensedFinancialStatementsTable_1698114" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1698115"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ScheduleOfCondensedFinancialStatementsTable_1698114" xlink:to="loc_dei_LegalEntityAxis_1698115" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1698116"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1698115" xlink:to="loc_dei_EntityDomain_1698116" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1698116_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1698115" xlink:to="loc_dei_EntityDomain_1698116_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrSeniorLendingProgramLlcMember" xlink:label="loc_slrc_SlrSeniorLendingProgramLlcMember_1698117"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1698116" xlink:to="loc_slrc_SlrSeniorLendingProgramLlcMember_1698117" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="loc_us-gaap_InvestmentOwnedAtCost_1698119"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_1698118" xlink:to="loc_us-gaap_InvestmentOwnedAtCost_1698119" use="optional" order="6"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/SlrSeniorLendingProgramLlcAdditionalInformationDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:label="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697908"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SummaryOfInvestmentHoldingsTable" xlink:label="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697907"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697908" xlink:to="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697907" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1697909"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697907" xlink:to="loc_dei_LegalEntityAxis_1697909" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1697910"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1697909" xlink:to="loc_dei_EntityDomain_1697910" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1697910_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1697909" xlink:to="loc_dei_EntityDomain_1697910_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrSeniorLendingProgramLlcMember" xlink:label="loc_slrc_SlrSeniorLendingProgramLlcMember_1697911"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1697910" xlink:to="loc_slrc_SlrSeniorLendingProgramLlcMember_1697911" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_1697912"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697907" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_1697912" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_1697913"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_1697912" xlink:to="loc_us-gaap_RelatedPartyDomain_1697913" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_1697913_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_1697912" xlink:to="loc_us-gaap_RelatedPartyDomain_1697913_default" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestorMember" xlink:label="loc_us-gaap_InvestorMember_1697914"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_1697913" xlink:to="loc_us-gaap_InvestorMember_1697914" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ManagementMember" xlink:label="loc_srt_ManagementMember_1697915"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_1697913" xlink:to="loc_srt_ManagementMember_1697915" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_1697916"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697907" xlink:to="loc_us-gaap_CreditFacilityAxis_1697916" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_1697917"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_1697916" xlink:to="loc_us-gaap_CreditFacilityDomain_1697917" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_1697917_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_1697916" xlink:to="loc_us-gaap_CreditFacilityDomain_1697917_default" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SeniorSecuredRevolvingCreditFacilityMember" xlink:label="loc_slrc_SeniorSecuredRevolvingCreditFacilityMember_1697919"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_1697917" xlink:to="loc_slrc_SeniorSecuredRevolvingCreditFacilityMember_1697919" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsAxis" xlink:label="loc_us-gaap_OtherCommitmentsAxis_1697920"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697907" xlink:to="loc_us-gaap_OtherCommitmentsAxis_1697920" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsDomain" xlink:label="loc_us-gaap_OtherCommitmentsDomain_1697921"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherCommitmentsAxis_1697920" xlink:to="loc_us-gaap_OtherCommitmentsDomain_1697921" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsDomain" xlink:label="loc_us-gaap_OtherCommitmentsDomain_1697921_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherCommitmentsAxis_1697920" xlink:to="loc_us-gaap_OtherCommitmentsDomain_1697921_default" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_UnfundedDebtAndEquityCommitmentsMember" xlink:label="loc_slrc_UnfundedDebtAndEquityCommitmentsMember_1697922"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_1697921" xlink:to="loc_slrc_UnfundedDebtAndEquityCommitmentsMember_1697922" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_1697923"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697907" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_1697923" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_1697924"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_1697923" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_1697924" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_1697924_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_1697923" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_1697924_default" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrSeniorLendingProgramSpvLlcMember" xlink:label="loc_slrc_SlrSeniorLendingProgramSpvLlcMember_1697925"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_1697924" xlink:to="loc_slrc_SlrSeniorLendingProgramSpvLlcMember_1697925" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_1697926"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697907" xlink:to="loc_us-gaap_VariableRateAxis_1697926" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_1697927"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_1697926" xlink:to="loc_us-gaap_VariableRateDomain_1697927" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_1697927_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_1697926" xlink:to="loc_us-gaap_VariableRateDomain_1697927_default" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_1697928"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_1697927" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_1697928" use="optional" order="26"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitment" xlink:label="loc_us-gaap_OtherCommitment_1697929"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697908" xlink:to="loc_us-gaap_OtherCommitment_1697929" use="optional" order="27"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_1697930"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697908" xlink:to="loc_us-gaap_LineOfCredit_1697930" use="optional" order="28"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="loc_us-gaap_DebtInstrumentMaturityDate_1697931"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697908" xlink:to="loc_us-gaap_DebtInstrumentMaturityDate_1697931" use="optional" order="29"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityInterestRateDuringPeriod" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_1697932"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697908" xlink:to="loc_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_1697932" use="optional" order="30"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherOwnershipInterestsValue" xlink:label="loc_us-gaap_OtherOwnershipInterestsValue_1697934"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697908" xlink:to="loc_us-gaap_OtherOwnershipInterestsValue_1697934" use="optional" order="31"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_1697935"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697908" xlink:to="loc_us-gaap_Assets_1697935" use="optional" order="32"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireInvestments_1697936"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697908" xlink:to="loc_us-gaap_PaymentsToAcquireInvestments_1697936" use="optional" order="33"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrepaidExpenseCurrentAndNoncurrent" xlink:label="loc_us-gaap_PrepaidExpenseCurrentAndNoncurrent_1697937"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697908" xlink:to="loc_us-gaap_PrepaidExpenseCurrentAndNoncurrent_1697937" use="optional" order="34"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/SubsequentEventsAdditionalInformationDetails">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventLineItems" xlink:label="loc_us-gaap_SubsequentEventLineItems_1431984"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTable" xlink:label="loc_us-gaap_SubsequentEventTable_1431983"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_1431984" xlink:to="loc_us-gaap_SubsequentEventTable_1431983" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_1431985"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_1431983" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_1431985" use="optional" order="2"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_1431986"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_1431985" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_1431986" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_1431986_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_1431985" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_1431986_default" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_1431987"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_1431986" xlink:to="loc_us-gaap_SubsequentEventMember_1431987" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_TitleOfIndividualAxis" xlink:label="loc_srt_TitleOfIndividualAxis_1431988"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_1431983" xlink:to="loc_srt_TitleOfIndividualAxis_1431988" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_1431989"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_1431988" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_1431989" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_1431989_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_1431988" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_1431989_default" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_BoardMember" xlink:label="loc_slrc_BoardMember_1431990"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_1431989" xlink:to="loc_slrc_BoardMember_1431990" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1697311"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_1431983" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1697311" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1697312"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1697311" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1697312" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1697312_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1697311" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1697312_default" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeAxis" xlink:label="loc_us-gaap_InvestmentTypeAxis_1697315"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_1431983" xlink:to="loc_us-gaap_InvestmentTypeAxis_1697315" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_1697316"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_1697315" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_1697316" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_1697316_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_1697315" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_1697316_default" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DividendsPayableAmountPerShare" xlink:label="loc_us-gaap_DividendsPayableAmountPerShare_1431991"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_1431984" xlink:to="loc_us-gaap_DividendsPayableAmountPerShare_1431991" use="optional" order="16"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="loc_us-gaap_UnrealizedGainLossOnInvestments" order="1.0"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/SlrSeniorLendingProgramLlcSummaryOfSslpSPortfolioDetailsAlternate">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:label="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SummaryOfInvestmentHoldingsTable" xlink:label="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697847"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697847" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesByIndustryAxis" xlink:label="loc_us-gaap_EquitySecuritiesByIndustryAxis_1697856"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697847" xlink:to="loc_us-gaap_EquitySecuritiesByIndustryAxis_1697856" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember_1697857"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquitySecuritiesByIndustryAxis_1697856" xlink:to="loc_us-gaap_EquitySecuritiesIndustryMember_1697857" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember_1697857_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquitySecuritiesByIndustryAxis_1697856" xlink:to="loc_us-gaap_EquitySecuritiesIndustryMember_1697857_default" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1697865"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697847" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1697865" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1697866"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1697865" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1697866" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_1697866_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_1697865" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_1697866_default" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1697944"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsTable_1697847" xlink:to="loc_dei_LegalEntityAxis_1697944" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1697945"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1697944" xlink:to="loc_dei_EntityDomain_1697945" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1697945_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1697944" xlink:to="loc_dei_EntityDomain_1697945_default" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SlrSeniorLendingProgramLlcMember" xlink:label="loc_slrc_SlrSeniorLendingProgramLlcMember_1697946"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1697945" xlink:to="loc_slrc_SlrSeniorLendingProgramLlcMember_1697946" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentBasisSpreadVariableRate" xlink:label="loc_us-gaap_InvestmentBasisSpreadVariableRate_1698857"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_InvestmentBasisSpreadVariableRate_1698857" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeFloorInterestRate" xlink:label="loc_us-gaap_DerivativeFloorInterestRate_1697850"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_DerivativeFloorInterestRate_1697850" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentInterestRate" xlink:label="loc_us-gaap_InvestmentInterestRate_1697851"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_InvestmentInterestRate_1697851" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeMaturityDates" xlink:label="loc_us-gaap_DerivativeMaturityDates_1697852"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_DerivativeMaturityDates_1697852" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" xlink:label="loc_us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue_1697853"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue_1697853" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="loc_us-gaap_InvestmentOwnedAtCost_1697854"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_InvestmentOwnedAtCost_1697854" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="loc_us-gaap_InvestmentOwnedAtFairValue_1697855"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfInvestmentHoldingsLineItems_1697848" xlink:to="loc_us-gaap_InvestmentOwnedAtFairValue_1697855" use="optional" order="19"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.slrinvestments.com/role/ConsolidatedScheduleOfInvestmentsAlternate">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_1698000"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_1698000" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_1698188"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_1698000" xlink:to="loc_srt_RangeAxis_1698188" use="optional" order="3"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1698189"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1698188" xlink:to="loc_srt_RangeMember_1698189" use="optional" order="4"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_1698189_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1698188" xlink:to="loc_srt_RangeMember_1698189_default" use="optional" order="5"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_1698191"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1698189" xlink:to="loc_srt_MinimumMember_1698191" use="optional" order="6"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_1698190"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1698189" xlink:to="loc_srt_MaximumMember_1698190" use="optional" order="7"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1698219"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_1698000" xlink:to="loc_dei_LegalEntityAxis_1698219" use="optional" order="8"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1698220"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1698219" xlink:to="loc_dei_EntityDomain_1698220" use="optional" order="9"/>
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1698220_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1698219" xlink:to="loc_dei_EntityDomain_1698220_default" use="optional" order="10"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeAxis" xlink:label="loc_us-gaap_InvestmentTypeAxis_1698222"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_1698000" xlink:to="loc_us-gaap_InvestmentTypeAxis_1698222" use="optional" order="11"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_1698223"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_1698222" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" use="optional" order="12"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_1698223_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_1698222" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_1698223_default" use="optional" order="13"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_DiversifiedFinancialServicesMember" xlink:label="loc_slrc_DiversifiedFinancialServicesMember_1698759"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_DiversifiedFinancialServicesMember_1698759" use="optional" order="14"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MultiSectorHoldingsMember" xlink:label="loc_slrc_MultiSectorHoldingsMember_1698762"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_MultiSectorHoldingsMember_1698762" use="optional" order="15"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_HealthCareProvidersAndServicesMember" xlink:label="loc_slrc_HealthCareProvidersAndServicesMember_1698764"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_HealthCareProvidersAndServicesMember_1698764" use="optional" order="16"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_HealthCareEquipmentAndSuppliesMember" xlink:label="loc_slrc_HealthCareEquipmentAndSuppliesMember_1698767"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_HealthCareEquipmentAndSuppliesMember_1698767" use="optional" order="17"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PharmaceuticalsMember" xlink:label="loc_slrc_PharmaceuticalsMember_1698769"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_PharmaceuticalsMember_1698769" use="optional" order="18"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_BiotechnologyMember" xlink:label="loc_slrc_BiotechnologyMember_1698772"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_BiotechnologyMember_1698772" use="optional" order="19"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SoftwareMember" xlink:label="loc_slrc_SoftwareMember_1698775"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_SoftwareMember_1698775" use="optional" order="20"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InsuranceMember" xlink:label="loc_slrc_InsuranceMember_1698776"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_InsuranceMember_1698776" use="optional" order="21"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_DiversifiedConsumerServicesMember" xlink:label="loc_slrc_DiversifiedConsumerServicesMember_1698777"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_DiversifiedConsumerServicesMember_1698777" use="optional" order="22"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CommercialServicesAndSuppliesMember" xlink:label="loc_slrc_CommercialServicesAndSuppliesMember_1698778"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_CommercialServicesAndSuppliesMember_1698778" use="optional" order="23"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetManagement1Member" xlink:label="loc_us-gaap_AssetManagement1Member_1698783"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_us-gaap_AssetManagement1Member_1698783" use="optional" order="24"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CapitalMarketsMember" xlink:label="loc_slrc_CapitalMarketsMember_1698784"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_CapitalMarketsMember_1698784" use="optional" order="25"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MediaMember" xlink:label="loc_slrc_MediaMember_1698785"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_MediaMember_1698785" use="optional" order="26"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ThriftsAndMortgageFinanceMember" xlink:label="loc_slrc_ThriftsAndMortgageFinanceMember_1698787"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_ThriftsAndMortgageFinanceMember_1698787" use="optional" order="27"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PersonalProductsMember" xlink:label="loc_slrc_PersonalProductsMember_1698789"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_PersonalProductsMember_1698789" use="optional" order="28"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_PackagedFoodsAndMeatsMember" xlink:label="loc_slrc_PackagedFoodsAndMeatsMember_1698791"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_PackagedFoodsAndMeatsMember_1698791" use="optional" order="29"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AutoPartsAndEquipmentMember" xlink:label="loc_slrc_AutoPartsAndEquipmentMember_1698793"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_AutoPartsAndEquipmentMember_1698793" use="optional" order="30"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_RoadAndRailMember" xlink:label="loc_slrc_RoadAndRailMember_1698794"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_RoadAndRailMember_1698794" use="optional" order="31"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LifeSciencesToolsAndServicesMember" xlink:label="loc_slrc_LifeSciencesToolsAndServicesMember_1698796"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_LifeSciencesToolsAndServicesMember_1698796" use="optional" order="32"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InternetSoftwareAndServicesMember" xlink:label="loc_slrc_InternetSoftwareAndServicesMember_1698797"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_InternetSoftwareAndServicesMember_1698797" use="optional" order="33"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InternetAndCatalogRetailMember" xlink:label="loc_slrc_InternetAndCatalogRetailMember_1698799"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_InternetAndCatalogRetailMember_1698799" use="optional" order="34"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TransportationInfrastructureMember" xlink:label="loc_slrc_TransportationInfrastructureMember_1698801"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_TransportationInfrastructureMember_1698801" use="optional" order="35"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_CommunicationsEquipmentMember" xlink:label="loc_slrc_CommunicationsEquipmentMember_1698802"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_CommunicationsEquipmentMember_1698802" use="optional" order="36"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_HealthCareTechnologyMember" xlink:label="loc_slrc_HealthCareTechnologyMember_1698803"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_HealthCareTechnologyMember_1698803" use="optional" order="37"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_TradingCompaniesAndDistributorsMember" xlink:label="loc_slrc_TradingCompaniesAndDistributorsMember_1698805"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_TradingCompaniesAndDistributorsMember_1698805" use="optional" order="38"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_HotelsRestaurantsAndLeisureMember" xlink:label="loc_slrc_HotelsRestaurantsAndLeisureMember_1698808"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_HotelsRestaurantsAndLeisureMember_1698808" use="optional" order="39"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AerospaceAndDefenseMember" xlink:label="loc_slrc_AerospaceAndDefenseMember_1698809"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_AerospaceAndDefenseMember_1698809" use="optional" order="40"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_OilGasAndConsumableFuelsMember" xlink:label="loc_slrc_OilGasAndConsumableFuelsMember_1698810"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_OilGasAndConsumableFuelsMember_1698810" use="optional" order="41"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_FootwearMember" xlink:label="loc_slrc_FootwearMember_1698811"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_FootwearMember_1698811" use="optional" order="42"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AutoComponentsMember" xlink:label="loc_slrc_AutoComponentsMember_1698812"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_AutoComponentsMember_1698812" use="optional" order="43"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ItServicesMember" xlink:label="loc_slrc_ItServicesMember_1698813"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_ItServicesMember_1698813" use="optional" order="44"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_FoodProductsMember" xlink:label="loc_slrc_FoodProductsMember_1698814"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_FoodProductsMember_1698814" use="optional" order="45"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MachineryMember" xlink:label="loc_slrc_MachineryMember_1698815"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_MachineryMember_1698815" use="optional" order="46"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_AirlinesMember" xlink:label="loc_slrc_AirlinesMember_1698816"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_AirlinesMember_1698816" use="optional" order="47"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_DistributorsMember" xlink:label="loc_slrc_DistributorsMember_1698817"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_DistributorsMember_1698817" use="optional" order="48"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_MetalsAndMiningMember" xlink:label="loc_slrc_MetalsAndMiningMember_1698818"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_MetalsAndMiningMember_1698818" use="optional" order="49"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_LeisureEquipmentAndProductsMember" xlink:label="loc_slrc_LeisureEquipmentAndProductsMember_1698819"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_LeisureEquipmentAndProductsMember_1698819" use="optional" order="50"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_SpecialtyRetailMember" xlink:label="loc_slrc_SpecialtyRetailMember_1698820"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_SpecialtyRetailMember_1698820" use="optional" order="51"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_FoodAndStaplesRetailingMember" xlink:label="loc_slrc_FoodAndStaplesRetailingMember_1698822"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_FoodAndStaplesRetailingMember_1698822" use="optional" order="52"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ConstructionAndEngineeringMember" xlink:label="loc_slrc_ConstructionAndEngineeringMember_1698823"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_ConstructionAndEngineeringMember_1698823" use="optional" order="53"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ConsumerFinanceMember" xlink:label="loc_slrc_ConsumerFinanceMember_1698824"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_ConsumerFinanceMember_1698824" use="optional" order="54"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_EnergyEquipmentAndServicesMember" xlink:label="loc_slrc_EnergyEquipmentAndServicesMember_1698825"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_EnergyEquipmentAndServicesMember_1698825" use="optional" order="55"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_WaterUtilitiesMember" xlink:label="loc_slrc_WaterUtilitiesMember_1698826"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_WaterUtilitiesMember_1698826" use="optional" order="56"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_WirelessTelecommunicationServicesMember" xlink:label="loc_slrc_WirelessTelecommunicationServicesMember_1698836"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_WirelessTelecommunicationServicesMember_1698836" use="optional" order="57"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_BuildingProductsMember" xlink:label="loc_slrc_BuildingProductsMember_1698839"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_BuildingProductsMember_1698839" use="optional" order="58"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_ContainersAndPackagingMember" xlink:label="loc_slrc_ContainersAndPackagingMember_1698843"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_1698223" xlink:to="loc_slrc_ContainersAndPackagingMember_1698843" use="optional" order="59"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesByIndustryAxis" xlink:label="loc_us-gaap_EquitySecuritiesByIndustryAxis_1698272"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_1698000" xlink:to="loc_us-gaap_EquitySecuritiesByIndustryAxis_1698272" use="optional" order="60"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember_1698273"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquitySecuritiesByIndustryAxis_1698272" xlink:to="loc_us-gaap_EquitySecuritiesIndustryMember_1698273" use="optional" order="61"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember_1698273_default"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquitySecuritiesByIndustryAxis_1698272" xlink:to="loc_us-gaap_EquitySecuritiesIndustryMember_1698273_default" use="optional" order="62"/>
<loc xlink:type="locator" xlink:href="slrc-20231231.xsd#slrc_InvestmentsOwnedIndustryName" xlink:label="loc_slrc_InvestmentsOwnedIndustryName_1698003"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_slrc_InvestmentsOwnedIndustryName_1698003" use="optional" order="63"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentBasisSpreadVariableRate" xlink:label="loc_us-gaap_InvestmentBasisSpreadVariableRate_1698004"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentBasisSpreadVariableRate_1698004" use="optional" order="64"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentInterestRateFloor" xlink:label="loc_us-gaap_InvestmentInterestRateFloor_1698005"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentInterestRateFloor_1698005" use="optional" order="65"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentInterestRate" xlink:label="loc_us-gaap_InvestmentInterestRate_1698007"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentInterestRate_1698007" use="optional" order="66"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentMaturityDate" xlink:label="loc_us-gaap_InvestmentMaturityDate_1698009"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentMaturityDate_1698009" use="optional" order="67"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:label="loc_us-gaap_InvestmentOwnedBalancePrincipalAmount_1698010"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentOwnedBalancePrincipalAmount_1698010" use="optional" order="68"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedBalanceShares" xlink:label="loc_us-gaap_InvestmentOwnedBalanceShares_1698011"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentOwnedBalanceShares_1698011" use="optional" order="69"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="loc_us-gaap_InvestmentOwnedAtCost_1698012"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentOwnedAtCost_1698012" use="optional" order="70"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:label="loc_us-gaap_InvestmentOwnedPercentOfNetAssets_1698745"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentOwnedPercentOfNetAssets_1698745" use="optional" order="71"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="loc_us-gaap_InvestmentOwnedAtFairValue_1698774"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentOwnedAtFairValue_1698774" use="optional" order="72"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentAcquisitionDate" xlink:label="loc_us-gaap_InvestmentAcquisitionDate_1698896"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_1698002" xlink:to="loc_us-gaap_InvestmentAcquisitionDate_1698896" use="optional" order="73"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists">
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract"/>
<loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="loc_us-gaap_UnrealizedGainLossOnInvestments" order="2.0"/>
</definitionLink>
</linkbase>


1 Subsequent Filing that References this Filing

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 4/17/24  SLR Investment Corp.              N-2ASR      4/17/24   20:2.2M                                   Donnelley … Solutions/FA


20 Previous Filings that this Filing References

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 2/28/23  SLR Investment Corp.              10-K       12/31/22  107:23M                                    Donnelley … Solutions/FA
10/12/22  SLR Investment Corp.              8-K:1,7,9  10/07/22   12:353K                                   Donnelley … Solutions/FA
 5/03/22  SLR Investment Corp.              10-Q        3/31/22    9:2.3M                                   Donnelley … Solutions/FA
 4/01/22  SLR Investment Corp.              8-K:1,2,7,9 4/01/22    5:96K                                    Donnelley … Solutions/FA
 3/01/22  SLR Investment Corp.              10-K       12/31/21   17:3.1M                                   Donnelley … Solutions/FA
 1/12/22  SLR Investment Corp.              8-K:1,2,7,9 1/06/22    3:117K                                   Donnelley … Solutions/FA
 1/03/22  SLR Investment Corp.              8-K:1,2,7,912/28/21    3:862K                                   Donnelley … Solutions/FA
12/01/21  SLR Investment Corp.              8-K:1,5,7,911/30/21    5:5.9M                                   Donnelley … Solutions/FA
 2/25/21  SLR Investment Corp.              8-K:1,5,8,9 2/24/21    4:70K                                    Donnelley … Solutions/FA
 5/07/20  SLR Senior Investment Corp.       10-Q        3/31/20    8:1.4M                                   Donnelley … Solutions/FA
 2/20/20  SLR Investment Corp.              10-K       12/31/19   18:3.7M                                   Donnelley … Solutions/FA
 8/06/18  SLR Investment Corp.              10-Q        6/30/18    6:1.6M                                   Donnelley … Solutions/FA
11/22/17  SLR Investment Corp.              POS EX     11/22/17    6:545K                                   Donnelley … Solutions/FA
 2/25/14  SLR Investment Corp.              10-K       12/31/13   10:2.3M                                   Donnelley … Solutions/FA
11/12/13  SLR Investment Corp.              POS 8C                 6:3.7M                                   Donnelley … Solutions/FA
 8/31/11  SLR Senior Investment Corp.       8-K:1,2,9   8/26/11    4:1.2M                                   Donnelley … Solutions/FA
 7/06/11  SLR Investment Corp.              N-2/A¶                 9:4.1M                                   Donnelley … Solutions/FA
11/29/10  SLR Investment Corp.              8-K:1,3,9  11/29/10    3:111K                                   Donnelley … Solutions/FA
 2/09/10  SLR Investment Corp.              N-2/A                 11:1.1M                                   Donnelley … Solutions/FA
 1/07/10  SLR Investment Corp.              N-2/A                 11:2.7M                                   Donnelley … Solutions/FA
Top
Filing Submission 0001193125-24-047930   –   Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)

Copyright © 2024 Fran Finnegan & Company LLC – All Rights Reserved.
AboutPrivacyRedactionsHelp — Fri., May 17, 5:01:06.1pm ET