SEC Info - SPX Corp - ‘10-K’ for 12/31/18

SEC Info℠

Home

Help

Please Sign In

SPX Corp – ‘10-K’ for 12/31/18 – ‘EX-101.DEF’

On: Friday, 2/15/19, at 5:08pm ET · For: 12/31/18 · Accession #: 88205-19-8 · File #: 1-06948

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

 2/15/19  SPX Corp                          10-K       12/31/18  119:22M

Annual Report — Form 10-K — Sect. 13 / 15(d) – SEA’34
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-K        Annual Report                                       HTML   1.56M 
 2: EX-21.1     Subsidiaries List                                   HTML     46K 
 3: EX-23.1     Consent of Experts or Counsel                       HTML     35K 
 4: EX-31.1     Certification -- §302 - SOA'02                      HTML     40K 
 5: EX-31.2     Certification -- §302 - SOA'02                      HTML     40K 
 6: EX-32.1     Certification -- §906 - SOA'02                      HTML     35K 
13: R1          Document and Entity Information                     HTML     66K 
14: R2          Consolidated Statements of Operations               HTML    169K 
15: R3          Consolidated Statements of Comprehensive Income     HTML     64K 
                (Loss)                                                           
16: R4          Consolidated Statements of Comprehensive Income     HTML     40K 
                (Loss) (Parenthetical)                                           
17: R5          Consolidated Balance Sheets                         HTML    145K 
18: R6          Consolidated Balance Sheets (Parenthetical)         HTML     44K 
19: R7          Consolidated Statements of Equity                   HTML     75K 
20: R8          Consolidated Statements of Equity (Parenthetical)   HTML     36K 
21: R9          Consolidated Statements of Cash Flows               HTML    166K 
22: R10         Consolidated Statements of Cash Flows               HTML     35K 
                (Parenthetical)                                                  
23: R11         Basis of Presentation and Summary of Significant    HTML     81K 
                Accounting Policies                                              
24: R12         Use of Estimates                                    HTML     99K 
25: R13         New Accounting Pronouncements                       HTML     83K 
26: R14         Acquisitions, Discontinued Operations, and Other    HTML    126K 
                Dispositions                                                     
27: R15         Revenues from Contracts                             HTML    216K 
28: R16         Information on Reportable and Other Operating       HTML    159K 
                Segments                                                         
29: R17         Special Charges, Net                                HTML    136K 
30: R18         Inventories, Net                                    HTML     48K 
31: R19         Goodwill and Other Intangible Assets                HTML    203K 
32: R20         Employee Benefit Plans                              HTML    403K 
33: R21         Income Taxes                                        HTML    161K 
34: R22         Indebtedness                                        HTML    131K 
35: R23         Derivative Financial Instruments and                HTML     51K 
                Concentrations of Credit Risk                                    
36: R24         Commitments, Contingent Liabilities and Other       HTML     82K 
                Matters                                                          
37: R25         Shareholders' Equity and Long-Term Incentive        HTML    266K 
                Compensation                                                     
38: R26         Fair Value                                          HTML     74K 
39: R27         Quarterly Results (Unaudited)                       HTML    127K 
40: R28         Subsequent Event                                    HTML     35K 
41: R29         Basis of Presentation and Summary of Significant    HTML    270K 
                Accounting Policies (Policies)                                   
42: R30         Basis of Presentation and Summary of Significant    HTML     49K 
                Accounting Policies (Tables)                                     
43: R31         Use of Estimates (Tables)                           HTML     85K 
44: R32         New Accounting Pronouncements (Tables)              HTML    146K 
45: R33         Acquisitions, Discontinued Operations, and Other    HTML    126K 
                Dispositions (Tables)                                            
46: R34         Revenues from Contracts (Tables)                    HTML    224K 
47: R35         Information on Reportable and Other Operating       HTML    154K 
                Segments (Tables)                                                
48: R36         Special Charges, Net (Tables)                       HTML    130K 
49: R37         Inventories, Net (Tables)                           HTML     47K 
50: R38         Goodwill and Other Intangible Assets (Tables)       HTML    199K 
51: R39         Employee Benefit Plans (Tables)                     HTML    404K 
52: R40         Income Taxes (Tables)                               HTML    149K 
53: R41         Indebtedness (Tables)                               HTML    100K 
54: R42         Commitments, Contingent Liabilities and Other       HTML     41K 
                Matters (Tables)                                                 
55: R43         Shareholders' Equity and Long-Term Incentive        HTML    268K 
                Compensation (Tables)                                            
56: R44         Fair Value (Tables)                                 HTML     58K 
57: R45         Quarterly Results (Unaudited) (Tables)              HTML    127K 
58: R46         Basis of Presentation and Summary of Significant    HTML    117K 
                Accounting Policies (Detail)                                     
59: R47         Basis of Presentation and Summary of Significant    HTML     53K 
                Accounting Policies - Revenue Recognition                        
                (Details)                                                        
60: R48         Basis of Presentation and Summary of Significant    HTML     41K 
                Accounting Policies - Research and Development                   
                (Details)                                                        
61: R49         Basis of Presentation and Summary of Significant    HTML     47K 
                Accounting Policies - Property, Plant and                        
                Equipment (Details)                                              
62: R50         Use of Estimates (Details)                          HTML     41K 
63: R51         Use of Estimates - Accrued Expenses (Details)       HTML     49K 
64: R52         Use of Estimates - Warranty (Details)               HTML     55K 
65: R53         Use of Estimates - Narrative (Details)              HTML     41K 
66: R54         New Accounting Pronouncements - Application of ASC  HTML     75K 
                606 (Details)                                                    
67: R55         New Accounting Pronouncements (Narrative)           HTML     66K 
                (Details)                                                        
68: R56         Acquisitions, Discontinued Operations, and Other    HTML    133K 
                Dispositions - Acquisitions (Details)                            
69: R57         Acquisitions, Discontinued Operations, and Other    HTML     72K 
                Dispositions - Sale of Blacke Durr Business                      
                (Details)                                                        
70: R58         Acquisitions, Discontinued Operations, and Other    HTML     65K 
                Dispositions - Consolidated Statements (Details)                 
71: R59         Acquisitions, Discontinued Operations, and Other    HTML     79K 
                Dispositions - Narrative (Details)                               
72: R60         Acquisitions, Discontinued Operations, and Other    HTML     66K 
                Dispositions - Results of Operations (Details)                   
73: R61         Revenues from Contracts - Remaining Performance     HTML     46K 
                Obligations (Details)                                            
74: R62         Revenues from Contracts (Details)                   HTML    187K 
75: R63         Revenues from Contracts - Narrative (Details)       HTML     66K 
76: R64         Revenues from Contracts - Effect of ASC 606         HTML    199K 
                (Details)                                                        
77: R65         Information on Reportable and Other Operating       HTML    174K 
                Segments (Details)                                               
78: R66         Special Charges, Net (Details)                      HTML     88K 
79: R67         Inventories, Net (Details)                          HTML     64K 
80: R68         Goodwill and Other Intangible Assets (Details)      HTML     81K 
81: R69         Goodwill and Other Intangible Assets - Schedule of  HTML    110K 
                Intangible Assets (Details)                                      
82: R70         Goodwill and Other Intangible Assets - Narrative    HTML     66K 
                (Details)                                                        
83: R71         Employee Benefit Plans - Overview (Details)         HTML     58K 
84: R72         Employee Benefit Plans - Defined Benefit Pension    HTML    130K 
                Plans (Details)                                                  
85: R73         Employee Benefit Plans - Summary of Changes in the  HTML     55K 
                Fair Value of Level 3 (Details)                                  
86: R74         Employee Benefit Plans - Estimated Future Benefit   HTML     66K 
                Payments (Details)                                               
87: R75         Employee Benefit Plans - Obligations and Funded     HTML    133K 
                Status (Details)                                                 
88: R76         Employee Benefit Plans - Net Periodic Expense       HTML    105K 
                (Income) and Additional Information (Details)                    
89: R77         Employee Benefit Plans - Postretirement Benefit     HTML    122K 
                Plans (Details)                                                  
90: R78         Employee Benefit Plans - Defined Contribution       HTML     47K 
                Retirement Plans (Details)                                       
91: R79         Income Taxes (Details)                              HTML    164K 
92: R80         Income Taxes - Narrative (Details)                  HTML    109K 
93: R81         Income Taxes - Schedule of Unrecognized Tax         HTML     54K 
                Benefits (Details)                                               
94: R82         Indebtedness (Details)                              HTML    118K 
95: R83         Indebtedness - Senior Credit Facilities (Details)   HTML     81K 
96: R84         Indebtedness - Consolidated Leverage Ratio          HTML     85K 
                (Details)                                                        
97: R85         Indebtedness - Senior Debt Prior Term Loan          HTML    126K 
                (Details)                                                        
98: R86         Derivative Financial Instruments and                HTML     74K 
                Concentrations of Credit Risk (Details)                          
99: R87         Commitments, Contingent Liabilities and Other       HTML     56K 
                Matters (Details)                                                
100: R88         Commitments, Contingent Liabilities and Other       HTML     87K  
                Matters - General (Details)                                      
101: R89         Commitments, Contingent Liabilities and Other       HTML     80K  
                Matters - Large Power Projects in South Africa                   
                (Details)                                                        
102: R90         Commitments, Contingent Liabilities and Other       HTML     63K  
                Matters - Noncontrolling Interest in South African               
                Subsidiary (Details)                                             
103: R91         Commitments, Contingent Liabilities and Other       HTML     40K  
                Matters - Environmental Matters (Details)                        
104: R92         Commitments, Contingent Liabilities and Other       HTML     37K  
                Matters - Executive Agreements (Details)                         
105: R93         Shareholders' Equity and Long-Term Incentive        HTML     89K  
                Compensation - Income (Loss) Per Share (Details)                 
106: R94         Shareholders' Equity and Long-Term Incentive        HTML     68K  
                Compensation - Common Stock and Treasury Stock                   
                (Details)                                                        
107: R95         Shareholders' Equity and Long-Term Incentive        HTML    102K  
                Compensation - Long-Term Incentive Compensation                  
                (Details)                                                        
108: R96         Shareholders' Equity and Long-Term Incentive        HTML    148K  
                Compensation - Stock Activity (Details)                          
109: R97         Shareholders' Equity and Long-Term Incentive        HTML     81K  
                Compensation - AOCI (Details)                                    
110: R98         Shareholders' Equity and Long-Term Incentive        HTML     68K  
                Compensation - Summary of Reclassified Components                
                of AOCI (Details)                                                
111: R99         Shareholders' Equity and Long-Term Incentive        HTML     54K  
                Compensation - Common Stock in Treasury, Dividends               
                and Preferred Stock (Details)                                    
112: R100        Fair Value (Details)                                HTML     89K  
113: R101        Fair Value - Schedule of Fair Value Assets and      HTML     56K  
                Liabilities (Details)                                            
114: R102        Quarterly Results (Unaudited) (Details)             HTML    178K  
115: R103        Subsequent Event (Details)                          HTML     38K  
116: R9999       Uncategorized Items - spxc-20181231.xml             HTML     44K  
118: XML         IDEA XML File -- Filing Summary                      XML    226K  
117: EXCEL       IDEA Workbook of Financial Reports                  XLSX    202K  
 7: EX-101.INS  XBRL Instance -- spxc-20181231                       XML   7.06M 
 9: EX-101.CAL  XBRL Calculations -- spxc-20181231_cal               XML    419K 
10: EX-101.DEF  XBRL Definitions -- spxc-20181231_def                XML   1.95M 
11: EX-101.LAB  XBRL Labels -- spxc-20181231_lab                     XML   3.46M 
12: EX-101.PRE  XBRL Presentations -- spxc-20181231_pre              XML   2.48M 
 8: EX-101.SCH  XBRL Schema -- spxc-20181231                         XSD    290K 
119: ZIP         XBRL Zipped Folder -- 0000088205-19-000008-xbrl      Zip    606K

‘EX-101.DEF’ — XBRL Definitions — spxc-20181231_def

This Exhibit is an XBRL XML File.

<?xml version="1.0" encoding="windows-1252"?>

<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

<link:roleRef roleURI="http://www.spx.com/role/AcquisitionsDiscontinuedOperationsAndOtherDispositions" xlink:href="spxc-20181231.xsd#AcquisitionsDiscontinuedOperationsAndOtherDispositions" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/AcquisitionsDiscontinuedOperationsAndOtherDispositionsAcquisitionsDetails" xlink:href="spxc-20181231.xsd#AcquisitionsDiscontinuedOperationsAndOtherDispositionsAcquisitionsDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/AcquisitionsDiscontinuedOperationsAndOtherDispositionsConsolidatedStatementsDetails" xlink:href="spxc-20181231.xsd#AcquisitionsDiscontinuedOperationsAndOtherDispositionsConsolidatedStatementsDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/AcquisitionsDiscontinuedOperationsAndOtherDispositionsNarrativeDetails" xlink:href="spxc-20181231.xsd#AcquisitionsDiscontinuedOperationsAndOtherDispositionsNarrativeDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/AcquisitionsDiscontinuedOperationsAndOtherDispositionsResultsOfOperationsDetails" xlink:href="spxc-20181231.xsd#AcquisitionsDiscontinuedOperationsAndOtherDispositionsResultsOfOperationsDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/AcquisitionsDiscontinuedOperationsAndOtherDispositionsSaleOfBlackeDurrBusinessDetails" xlink:href="spxc-20181231.xsd#AcquisitionsDiscontinuedOperationsAndOtherDispositionsSaleOfBlackeDurrBusinessDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/AcquisitionsDiscontinuedOperationsAndOtherDispositionsTables" xlink:href="spxc-20181231.xsd#AcquisitionsDiscontinuedOperationsAndOtherDispositionsTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPolicies" xlink:href="spxc-20181231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPolicies" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesDetail" xlink:href="spxc-20181231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesDetail" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:href="spxc-20181231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPropertyPlantAndEquipmentDetails" xlink:href="spxc-20181231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPropertyPlantAndEquipmentDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesResearchAndDevelopmentDetails" xlink:href="spxc-20181231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesResearchAndDevelopmentDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesRevenueRecognitionDetails" xlink:href="spxc-20181231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesRevenueRecognitionDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables" xlink:href="spxc-20181231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMatters" xlink:href="spxc-20181231.xsd#CommitmentsContingentLiabilitiesAndOtherMatters" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMattersDetails" xlink:href="spxc-20181231.xsd#CommitmentsContingentLiabilitiesAndOtherMattersDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMattersEnvironmentalMattersDetails" xlink:href="spxc-20181231.xsd#CommitmentsContingentLiabilitiesAndOtherMattersEnvironmentalMattersDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMattersExecutiveAgreementsDetails" xlink:href="spxc-20181231.xsd#CommitmentsContingentLiabilitiesAndOtherMattersExecutiveAgreementsDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMattersGeneralDetails" xlink:href="spxc-20181231.xsd#CommitmentsContingentLiabilitiesAndOtherMattersGeneralDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMattersLargePowerProjectsInSouthAfricaDetails" xlink:href="spxc-20181231.xsd#CommitmentsContingentLiabilitiesAndOtherMattersLargePowerProjectsInSouthAfricaDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMattersNoncontrollingInterestInSouthAfricanSubsidiaryDetails" xlink:href="spxc-20181231.xsd#CommitmentsContingentLiabilitiesAndOtherMattersNoncontrollingInterestInSouthAfricanSubsidiaryDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMattersTables" xlink:href="spxc-20181231.xsd#CommitmentsContingentLiabilitiesAndOtherMattersTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ConsolidatedBalanceSheets" xlink:href="spxc-20181231.xsd#ConsolidatedBalanceSheets" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="spxc-20181231.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="spxc-20181231.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ConsolidatedStatementsOfCashFlowsParenthetical" xlink:href="spxc-20181231.xsd#ConsolidatedStatementsOfCashFlowsParenthetical" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" xlink:href="spxc-20181231.xsd#ConsolidatedStatementsOfComprehensiveIncomeLoss" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical" xlink:href="spxc-20181231.xsd#ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ConsolidatedStatementsOfEquity" xlink:href="spxc-20181231.xsd#ConsolidatedStatementsOfEquity" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ConsolidatedStatementsOfEquityParenthetical" xlink:href="spxc-20181231.xsd#ConsolidatedStatementsOfEquityParenthetical" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ConsolidatedStatementsOfOperations" xlink:href="spxc-20181231.xsd#ConsolidatedStatementsOfOperations" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/DerivativeFinancialInstrumentsAndConcentrationsOfCreditRisk" xlink:href="spxc-20181231.xsd#DerivativeFinancialInstrumentsAndConcentrationsOfCreditRisk" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/DerivativeFinancialInstrumentsAndConcentrationsOfCreditRiskDetails" xlink:href="spxc-20181231.xsd#DerivativeFinancialInstrumentsAndConcentrationsOfCreditRiskDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/DocumentAndEntityInformation" xlink:href="spxc-20181231.xsd#DocumentAndEntityInformation" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/EmployeeBenefitPlans" xlink:href="spxc-20181231.xsd#EmployeeBenefitPlans" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/EmployeeBenefitPlansDefinedBenefitPensionPlansDetails" xlink:href="spxc-20181231.xsd#EmployeeBenefitPlansDefinedBenefitPensionPlansDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/EmployeeBenefitPlansDefinedContributionRetirementPlansDetails" xlink:href="spxc-20181231.xsd#EmployeeBenefitPlansDefinedContributionRetirementPlansDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/EmployeeBenefitPlansEstimatedFutureBenefitPaymentsDetails" xlink:href="spxc-20181231.xsd#EmployeeBenefitPlansEstimatedFutureBenefitPaymentsDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/EmployeeBenefitPlansNetPeriodicExpenseIncomeAndAdditionalInformationDetails" xlink:href="spxc-20181231.xsd#EmployeeBenefitPlansNetPeriodicExpenseIncomeAndAdditionalInformationDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/EmployeeBenefitPlansObligationsAndFundedStatusDetails" xlink:href="spxc-20181231.xsd#EmployeeBenefitPlansObligationsAndFundedStatusDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/EmployeeBenefitPlansOverviewDetails" xlink:href="spxc-20181231.xsd#EmployeeBenefitPlansOverviewDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/EmployeeBenefitPlansPostretirementBenefitPlansDetails" xlink:href="spxc-20181231.xsd#EmployeeBenefitPlansPostretirementBenefitPlansDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/EmployeeBenefitPlansSummaryOfChangesInFairValueOfLevel3Details" xlink:href="spxc-20181231.xsd#EmployeeBenefitPlansSummaryOfChangesInFairValueOfLevel3Details" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/EmployeeBenefitPlansTables" xlink:href="spxc-20181231.xsd#EmployeeBenefitPlansTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/FairValue" xlink:href="spxc-20181231.xsd#FairValue" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/FairValueDetails" xlink:href="spxc-20181231.xsd#FairValueDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/FairValueScheduleOfFairValueAssetsAndLiabilitiesDetails" xlink:href="spxc-20181231.xsd#FairValueScheduleOfFairValueAssetsAndLiabilitiesDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/FairValueTables" xlink:href="spxc-20181231.xsd#FairValueTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/GoodwillAndOtherIntangibleAssets" xlink:href="spxc-20181231.xsd#GoodwillAndOtherIntangibleAssets" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/GoodwillAndOtherIntangibleAssetsDetails" xlink:href="spxc-20181231.xsd#GoodwillAndOtherIntangibleAssetsDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/GoodwillAndOtherIntangibleAssetsNarrativeDetails" xlink:href="spxc-20181231.xsd#GoodwillAndOtherIntangibleAssetsNarrativeDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/GoodwillAndOtherIntangibleAssetsScheduleOfIntangibleAssetsDetails" xlink:href="spxc-20181231.xsd#GoodwillAndOtherIntangibleAssetsScheduleOfIntangibleAssetsDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/GoodwillAndOtherIntangibleAssetsTables" xlink:href="spxc-20181231.xsd#GoodwillAndOtherIntangibleAssetsTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/IncomeTaxes" xlink:href="spxc-20181231.xsd#IncomeTaxes" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/IncomeTaxesDetails" xlink:href="spxc-20181231.xsd#IncomeTaxesDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/IncomeTaxesNarrativeDetails" xlink:href="spxc-20181231.xsd#IncomeTaxesNarrativeDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/IncomeTaxesScheduleOfUnrecognizedTaxBenefitsDetails" xlink:href="spxc-20181231.xsd#IncomeTaxesScheduleOfUnrecognizedTaxBenefitsDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/IncomeTaxesTables" xlink:href="spxc-20181231.xsd#IncomeTaxesTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/Indebtedness" xlink:href="spxc-20181231.xsd#Indebtedness" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/IndebtednessConsolidatedLeverageRatioDetails" xlink:href="spxc-20181231.xsd#IndebtednessConsolidatedLeverageRatioDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/IndebtednessDetails" xlink:href="spxc-20181231.xsd#IndebtednessDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/IndebtednessSeniorCreditFacilitiesDetails" xlink:href="spxc-20181231.xsd#IndebtednessSeniorCreditFacilitiesDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/IndebtednessSeniorDebtPriorTermLoanDetails" xlink:href="spxc-20181231.xsd#IndebtednessSeniorDebtPriorTermLoanDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/IndebtednessTables" xlink:href="spxc-20181231.xsd#IndebtednessTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/InformationOnReportableAndOtherOperatingSegments" xlink:href="spxc-20181231.xsd#InformationOnReportableAndOtherOperatingSegments" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/InformationOnReportableAndOtherOperatingSegmentsDetails" xlink:href="spxc-20181231.xsd#InformationOnReportableAndOtherOperatingSegmentsDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/InformationOnReportableAndOtherOperatingSegmentsTables" xlink:href="spxc-20181231.xsd#InformationOnReportableAndOtherOperatingSegmentsTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/InventoriesNet" xlink:href="spxc-20181231.xsd#InventoriesNet" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/InventoriesNetDetails" xlink:href="spxc-20181231.xsd#InventoriesNetDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/InventoriesNetTables" xlink:href="spxc-20181231.xsd#InventoriesNetTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/NewAccountingPronouncements" xlink:href="spxc-20181231.xsd#NewAccountingPronouncements" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/NewAccountingPronouncementsApplicationOfAsc606Details" xlink:href="spxc-20181231.xsd#NewAccountingPronouncementsApplicationOfAsc606Details" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/NewAccountingPronouncementsNarrativeDetails" xlink:href="spxc-20181231.xsd#NewAccountingPronouncementsNarrativeDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/NewAccountingPronouncementsTables" xlink:href="spxc-20181231.xsd#NewAccountingPronouncementsTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/QuarterlyResultsUnaudited" xlink:href="spxc-20181231.xsd#QuarterlyResultsUnaudited" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/QuarterlyResultsUnauditedDetails" xlink:href="spxc-20181231.xsd#QuarterlyResultsUnauditedDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/QuarterlyResultsUnauditedTables" xlink:href="spxc-20181231.xsd#QuarterlyResultsUnauditedTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/RevenuesFromContracts" xlink:href="spxc-20181231.xsd#RevenuesFromContracts" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/RevenuesFromContractsDetails" xlink:href="spxc-20181231.xsd#RevenuesFromContractsDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/RevenuesFromContractsEffectOfAsc606Details" xlink:href="spxc-20181231.xsd#RevenuesFromContractsEffectOfAsc606Details" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/RevenuesFromContractsNarrativeDetails" xlink:href="spxc-20181231.xsd#RevenuesFromContractsNarrativeDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/RevenuesFromContractsRemainingPerformanceObligationsDetails" xlink:href="spxc-20181231.xsd#RevenuesFromContractsRemainingPerformanceObligationsDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/RevenuesFromContractsTables" xlink:href="spxc-20181231.xsd#RevenuesFromContractsTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensation" xlink:href="spxc-20181231.xsd#ShareholdersEquityAndLongTermIncentiveCompensation" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationAociDetails" xlink:href="spxc-20181231.xsd#ShareholdersEquityAndLongTermIncentiveCompensationAociDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationCommonStockAndTreasuryStockDetails" xlink:href="spxc-20181231.xsd#ShareholdersEquityAndLongTermIncentiveCompensationCommonStockAndTreasuryStockDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationCommonStockInTreasuryDividendsAndPreferredStockDetails" xlink:href="spxc-20181231.xsd#ShareholdersEquityAndLongTermIncentiveCompensationCommonStockInTreasuryDividendsAndPreferredStockDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationIncomeLossPerShareDetails" xlink:href="spxc-20181231.xsd#ShareholdersEquityAndLongTermIncentiveCompensationIncomeLossPerShareDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationLongTermIncentiveCompensationDetails" xlink:href="spxc-20181231.xsd#ShareholdersEquityAndLongTermIncentiveCompensationLongTermIncentiveCompensationDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationStockActivityDetails" xlink:href="spxc-20181231.xsd#ShareholdersEquityAndLongTermIncentiveCompensationStockActivityDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationSummaryOfReclassifiedComponentsOfAociDetails" xlink:href="spxc-20181231.xsd#ShareholdersEquityAndLongTermIncentiveCompensationSummaryOfReclassifiedComponentsOfAociDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationTables" xlink:href="spxc-20181231.xsd#ShareholdersEquityAndLongTermIncentiveCompensationTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/SpecialChargesNet" xlink:href="spxc-20181231.xsd#SpecialChargesNet" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/SpecialChargesNetDetails" xlink:href="spxc-20181231.xsd#SpecialChargesNetDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/SpecialChargesNetTables" xlink:href="spxc-20181231.xsd#SpecialChargesNetTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/SubsequentEvent" xlink:href="spxc-20181231.xsd#SubsequentEvent" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/SubsequentEventDetails" xlink:href="spxc-20181231.xsd#SubsequentEventDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/UseOfEstimates" xlink:href="spxc-20181231.xsd#UseOfEstimates" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/UseOfEstimatesAccruedExpensesDetails" xlink:href="spxc-20181231.xsd#UseOfEstimatesAccruedExpensesDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/UseOfEstimatesDetails" xlink:href="spxc-20181231.xsd#UseOfEstimatesDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/UseOfEstimatesNarrativeDetails" xlink:href="spxc-20181231.xsd#UseOfEstimatesNarrativeDetails" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/UseOfEstimatesTables" xlink:href="spxc-20181231.xsd#UseOfEstimatesTables" xlink:type="simple"/>

<link:roleRef roleURI="http://www.spx.com/role/UseOfEstimatesWarrantyDetails" xlink:href="spxc-20181231.xsd#UseOfEstimatesWarrantyDetails" xlink:type="simple"/>

<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" xlink:type="simple"/>

<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" xlink:type="simple"/>

<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" xlink:type="simple"/>

<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" xlink:type="simple"/>

<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" xlink:type="simple"/>

<link:definitionLink xlink:role="http://www.spx.com/role/AcquisitionsDiscontinuedOperationsAndOtherDispositions" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/AcquisitionsDiscontinuedOperationsAndOtherDispositionsAcquisitionsDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_D662230400A72A46FC74F20F8CACE4E3" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_D662230400A72A46FC74F20F8CACE4E3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_F215D3362F2F46209960F20F8CACE4AA" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_D662230400A72A46FC74F20F8CACE4E3" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_F215D3362F2F46209960F20F8CACE4AA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_FEA3FCCF660970600F5DF20F8CAC3B87_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_F215D3362F2F46209960F20F8CACE4AA" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_FEA3FCCF660970600F5DF20F8CAC3B87_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_F215D3362F2F46209960F20F8CACE4AA" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_FEA3FCCF660970600F5DF20F8CAC3B87" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_31184CF0C525233E04D0F20F8CAC4A49" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_FEA3FCCF660970600F5DF20F8CAC3B87" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_31184CF0C525233E04D0F20F8CAC4A49" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0D706D96530AEDB1A19FF20F8CAD42E3" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_D662230400A72A46FC74F20F8CACE4E3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0D706D96530AEDB1A19FF20F8CAD42E3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8CBB6295E329F40A97DEF20F8CAD04EF_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0D706D96530AEDB1A19FF20F8CAD42E3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8CBB6295E329F40A97DEF20F8CAD04EF_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0D706D96530AEDB1A19FF20F8CAD42E3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8CBB6295E329F40A97DEF20F8CAD04EF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OrderOrProductionBacklogMember" xlink:label="loc_us-gaap_OrderOrProductionBacklogMember_988C6A38F2A54A1BDECAF20F8CADEFFD" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8CBB6295E329F40A97DEF20F8CAD04EF" xlink:to="loc_us-gaap_OrderOrProductionBacklogMember_988C6A38F2A54A1BDECAF20F8CADEFFD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="loc_us-gaap_CustomerRelationshipsMember_2F91B26CC3F80C79BB9EF20F8CAE772A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8CBB6295E329F40A97DEF20F8CAD04EF" xlink:to="loc_us-gaap_CustomerRelationshipsMember_2F91B26CC3F80C79BB9EF20F8CAE772A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_B25736E202239024E4CDF20F8CAE2A86" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8CBB6295E329F40A97DEF20F8CAD04EF" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_B25736E202239024E4CDF20F8CAE2A86" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_F2B1557B9FAE04C83F4CF20F8CAED830" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_D662230400A72A46FC74F20F8CACE4E3" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_F2B1557B9FAE04C83F4CF20F8CAED830" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_91E809EEC4F7A014653BF20F8CAE14AB_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_F2B1557B9FAE04C83F4CF20F8CAED830" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_91E809EEC4F7A014653BF20F8CAE14AB_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_F2B1557B9FAE04C83F4CF20F8CAED830" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_91E809EEC4F7A014653BF20F8CAE14AB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TrademarksMember" xlink:label="loc_us-gaap_TrademarksMember_88473B615ADB6ACCACC9F20F8CAE2415" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_91E809EEC4F7A014653BF20F8CAE14AB" xlink:to="loc_us-gaap_TrademarksMember_88473B615ADB6ACCACC9F20F8CAE2415" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_81C504C5B64B9EA06254F20F8CAF29BA" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_D662230400A72A46FC74F20F8CACE4E3" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_81C504C5B64B9EA06254F20F8CAF29BA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_76A8B24278F97049B6D7F20F8CAF2753_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_81C504C5B64B9EA06254F20F8CAF29BA" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_76A8B24278F97049B6D7F20F8CAF2753_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_81C504C5B64B9EA06254F20F8CAF29BA" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_76A8B24278F97049B6D7F20F8CAF2753" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_CuesInc.Member" xlink:label="loc_spxc_CuesInc.Member_253209F2E15A6A2D36F2F20F8CAFA95F" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_76A8B24278F97049B6D7F20F8CAF2753" xlink:to="loc_spxc_CuesInc.Member_253209F2E15A6A2D36F2F20F8CAFA95F" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SchonstedtInstrumentCompanyMember" xlink:label="loc_spxc_SchonstedtInstrumentCompanyMember_1888A1A56636AA06B4C9F20F8CAFBF9B" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_76A8B24278F97049B6D7F20F8CAF2753" xlink:to="loc_spxc_SchonstedtInstrumentCompanyMember_1888A1A56636AA06B4C9F20F8CAFBF9B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_B2025E53D7FC1C106483F20F8CB0D77A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_B2025E53D7FC1C106483F20F8CB0D77A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAcquiredFromAcquisition" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_28BB429A67E10A067C52F20F8CB03FEF" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_CashAcquiredFromAcquisition_28BB429A67E10A067C52F20F8CB03FEF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets_AAA5B3FBBF2302202941F20F8CB0D1E2" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets_AAA5B3FBBF2302202941F20F8CB0D1E2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_0CDEAAB2D456300100F6F20F8CB0DBE7" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_0CDEAAB2D456300100F6F20F8CB0DBE7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_EA562F820F08FB13403EF20F8CB08FB7" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_EA562F820F08FB13403EF20F8CB08FB7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_324AF86913DE76A26A89F20F8CB10622" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_Goodwill_324AF86913DE76A26A89F20F8CB10622" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_C5AB1D4E4990CCBACBEBF20F8CB12573" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_C5AB1D4E4990CCBACBEBF20F8CB12573" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_102B96C7DE4BA72EA8E3F20F8CB113D5" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_102B96C7DE4BA72EA8E3F20F8CB113D5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_0C015F1091CA5621BE98F20F8CB1B401" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_0C015F1091CA5621BE98F20F8CB1B401" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_0B6E223E2BE9481C0F8AF20F8CB10F2B" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_0B6E223E2BE9481C0F8AF20F8CB10F2B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities_ED9A82B912837AA803C5F20F8CB18274" xlink:type="locator"/>

<link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities_ED9A82B912837AA803C5F20F8CB18274" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_31B2C6E89B220CF38E47F20F8CB2B314" xlink:type="locator"/>

<link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_31B2C6E89B220CF38E47F20F8CB2B314" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_96DB54F4A39D6A7818FFF20F8CB262DE" xlink:type="locator"/>

<link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_96DB54F4A39D6A7818FFF20F8CB262DE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_C55D1D5E3CFC0D7DA634F20F8CB2E6DB" xlink:type="locator"/>

<link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_C55D1D5E3CFC0D7DA634F20F8CB2E6DB" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedFairValueReceivables" xlink:label="loc_spxc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedFairValueReceivables_307304EE24CA1F909696F20F8CB2BD2A" xlink:type="locator"/>

<link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_spxc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedFairValueReceivables_307304EE24CA1F909696F20F8CB2BD2A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_9F59B32EBEB2A79AD320F20F8CB2AE28" xlink:type="locator"/>

<link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_Revenues_9F59B32EBEB2A79AD320F20F8CB2AE28" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_43360EB76655CA1D3253F20F8CB2DBA9" xlink:type="locator"/>

<link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_NetIncomeLoss_43360EB76655CA1D3253F20F8CB2DBA9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges" xlink:label="loc_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_2D545005469AF0C3D079F20F8CB28254" xlink:type="locator"/>

<link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_2D545005469AF0C3D079F20F8CB28254" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_B5C426D8881643D47452F20F8CB3A817" xlink:type="locator"/>

<link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_B5C426D8881643D47452F20F8CB3A817" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationAbstract" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaInformationAbstract_5C5639F3A9387D125CFCF20F8CB3AD9B" xlink:type="locator"/>

<link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B560520FBD88F5FBF1C9F20F8CAF58BF" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaInformationAbstract_5C5639F3A9387D125CFCF20F8CB3AD9B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_2EDB5DA31BF77C486FB4F20F8CB328EB" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationAbstract_5C5639F3A9387D125CFCF20F8CB3AD9B" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_2EDB5DA31BF77C486FB4F20F8CB328EB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax_6553560718D39C554E58F20F8CB34D8E" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationAbstract_5C5639F3A9387D125CFCF20F8CB3AD9B" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax_6553560718D39C554E58F20F8CB34D8E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_23B5DF0BBB05210CE41FF20F8CB36789" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationAbstract_5C5639F3A9387D125CFCF20F8CB3AD9B" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_23B5DF0BBB05210CE41FF20F8CB36789" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic_0B0B039A5F0775874D89F20F8CB3A8C6" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationAbstract_5C5639F3A9387D125CFCF20F8CB3AD9B" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic_0B0B039A5F0775874D89F20F8CB3A8C6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted_90B160F436BE90231755F20F8CB46D76" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationAbstract_5C5639F3A9387D125CFCF20F8CB3AD9B" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted_90B160F436BE90231755F20F8CB46D76" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_FABBC83DF4D2E4874BF5F20F8CB4FDBE" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationAbstract_5C5639F3A9387D125CFCF20F8CB3AD9B" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_FABBC83DF4D2E4874BF5F20F8CB4FDBE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_D544C0547C84979CDDDDF20F8CB44B3A" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationAbstract_5C5639F3A9387D125CFCF20F8CB3AD9B" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_D544C0547C84979CDDDDF20F8CB44B3A" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/AcquisitionsDiscontinuedOperationsAndOtherDispositionsConsolidatedStatementsDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_98AFD42D55E8911B8A95E23067D572E7" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_86631CE3B8DC8F678DD0E23067D34A8C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_98AFD42D55E8911B8A95E23067D572E7" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_86631CE3B8DC8F678DD0E23067D34A8C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_92468CD65C0F820F1E7DE23067D3DCD6" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_86631CE3B8DC8F678DD0E23067D34A8C" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_92468CD65C0F820F1E7DE23067D3DCD6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3BFB816DF7DE11823542E23067D3B351_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_92468CD65C0F820F1E7DE23067D3DCD6" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3BFB816DF7DE11823542E23067D3B351_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_92468CD65C0F820F1E7DE23067D3DCD6" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3BFB816DF7DE11823542E23067D3B351" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BalckeDurrBusinessMember" xlink:label="loc_spxc_BalckeDurrBusinessMember_9C997E16822349724E8CE23067D4DFEE" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3BFB816DF7DE11823542E23067D3B351" xlink:to="loc_spxc_BalckeDurrBusinessMember_9C997E16822349724E8CE23067D4DFEE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_6BB51ED7CBDA0B377557E23067D466E5" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_86631CE3B8DC8F678DD0E23067D34A8C" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_6BB51ED7CBDA0B377557E23067D466E5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_EAEE7798C9FEB45B3D1BE23067D431CA_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_6BB51ED7CBDA0B377557E23067D466E5" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_EAEE7798C9FEB45B3D1BE23067D431CA_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_6BB51ED7CBDA0B377557E23067D466E5" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_EAEE7798C9FEB45B3D1BE23067D431CA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfBySaleMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_6F1756403765D94F4068E23067D414E3" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_EAEE7798C9FEB45B3D1BE23067D431CA" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_6F1756403765D94F4068E23067D414E3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_47BAC16D4E41FEE7ACD3E23067D59E6B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_98AFD42D55E8911B8A95E23067D572E7" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_47BAC16D4E41FEE7ACD3E23067D59E6B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold_F86D930B95D9F3740043E23067D50717" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_98AFD42D55E8911B8A95E23067D572E7" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold_F86D930B95D9F3740043E23067D50717" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense_E492A16CC44664119205E23067D53493" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_98AFD42D55E8911B8A95E23067D572E7" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense_E492A16CC44664119205E23067D53493" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DisposalGroupIncludingDiscontinuedOperationSpecialCharges" xlink:label="loc_spxc_DisposalGroupIncludingDiscontinuedOperationSpecialCharges_531E42693D794618C88CE23067D5B1D7" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_98AFD42D55E8911B8A95E23067D572E7" xlink:to="loc_spxc_DisposalGroupIncludingDiscontinuedOperationSpecialCharges_531E42693D794618C88CE23067D5B1D7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherExpense" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherExpense_9D90927203B00E071FD5E23067D6134C" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_98AFD42D55E8911B8A95E23067D572E7" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherExpense_9D90927203B00E071FD5E23067D6134C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax_2AA603B65EF096C9B324E23067D6B653" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_98AFD42D55E8911B8A95E23067D572E7" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax_2AA603B65EF096C9B324E23067D6B653" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod" xlink:label="loc_us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod_120ADC7B7AFCE77C9176E23067D62B4B" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_98AFD42D55E8911B8A95E23067D572E7" xlink:to="loc_us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod_120ADC7B7AFCE77C9176E23067D62B4B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_800C211DD8F1FB726A25E23067D6DCAA" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_98AFD42D55E8911B8A95E23067D572E7" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_800C211DD8F1FB726A25E23067D6DCAA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepreciationAndAmortizationDiscontinuedOperations" xlink:label="loc_us-gaap_DepreciationAndAmortizationDiscontinuedOperations_21EE1F2130423DCC482CE23067D69D4A" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_98AFD42D55E8911B8A95E23067D572E7" xlink:to="loc_us-gaap_DepreciationAndAmortizationDiscontinuedOperations_21EE1F2130423DCC482CE23067D69D4A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalExpenditureDiscontinuedOperations" xlink:label="loc_us-gaap_CapitalExpenditureDiscontinuedOperations_E4C94CD6FDF93AFCC1AFE23067D7085C" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_98AFD42D55E8911B8A95E23067D572E7" xlink:to="loc_us-gaap_CapitalExpenditureDiscontinuedOperations_E4C94CD6FDF93AFCC1AFE23067D7085C" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/AcquisitionsDiscontinuedOperationsAndOtherDispositionsNarrativeDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_6DCEE7377F2646D685B4E3EC42178F28" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_37DCA4C01A2F0039B235E3EC42100DAD" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_6DCEE7377F2646D685B4E3EC42178F28" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_37DCA4C01A2F0039B235E3EC42100DAD" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_6C4B530EFF0949B2D6C2E3EC4211C8E2" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_37DCA4C01A2F0039B235E3EC42100DAD" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_6C4B530EFF0949B2D6C2E3EC4211C8E2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_823D19E464C498901294E3EC42115BE0_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_6C4B530EFF0949B2D6C2E3EC4211C8E2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_823D19E464C498901294E3EC42115BE0_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_6C4B530EFF0949B2D6C2E3EC4211C8E2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_823D19E464C498901294E3EC42115BE0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BuildingMember" xlink:label="loc_us-gaap_BuildingMember_C77261F435411F245DAEE3EC4211CCD4" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_823D19E464C498901294E3EC42115BE0" xlink:to="loc_us-gaap_BuildingMember_C77261F435411F245DAEE3EC4211CCD4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_810A7DC11DCEB1937EEEE3EC42124632" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_37DCA4C01A2F0039B235E3EC42100DAD" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_810A7DC11DCEB1937EEEE3EC42124632" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_527DC9EF18FDA254A4BBE3EC42123AA1_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_810A7DC11DCEB1937EEEE3EC42124632" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_527DC9EF18FDA254A4BBE3EC42123AA1_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_527DC9EF18FDA254A4BBE3EC42123AA1" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_810A7DC11DCEB1937EEEE3EC42124632" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_527DC9EF18FDA254A4BBE3EC42123AA1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_0B12263BF88CCC6E8084E3EC4212C400" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_527DC9EF18FDA254A4BBE3EC42123AA1" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_0B12263BF88CCC6E8084E3EC4212C400" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_AC5367CCAB12E474B68BE3EC421352A7" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_37DCA4C01A2F0039B235E3EC42100DAD" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_AC5367CCAB12E474B68BE3EC421352A7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_36B3055191C3BAB1D25CE3EC421303D6_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_AC5367CCAB12E474B68BE3EC421352A7" xlink:to="loc_us-gaap_EquityComponentDomain_36B3055191C3BAB1D25CE3EC421303D6_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_AC5367CCAB12E474B68BE3EC421352A7" xlink:to="loc_us-gaap_EquityComponentDomain_36B3055191C3BAB1D25CE3EC421303D6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember" xlink:label="loc_us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_B9B6093A23ABB44C8D81E3EC4214E191" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_36B3055191C3BAB1D25CE3EC421303D6" xlink:to="loc_us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_B9B6093A23ABB44C8D81E3EC4214E191" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_94E982F65CA42D525E9CE3EC4214CA73" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_37DCA4C01A2F0039B235E3EC42100DAD" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_94E982F65CA42D525E9CE3EC4214CA73" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_A0D869D55170C2015EAFE3EC4214DDF6_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_94E982F65CA42D525E9CE3EC4214CA73" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_A0D869D55170C2015EAFE3EC4214DDF6_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_A0D869D55170C2015EAFE3EC4214DDF6" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_94E982F65CA42D525E9CE3EC4214CA73" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_A0D869D55170C2015EAFE3EC4214DDF6" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BalckeDurrBusinessMember" xlink:label="loc_spxc_BalckeDurrBusinessMember_4DD3F46498C0A6670AFEE3EC4214A79E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_A0D869D55170C2015EAFE3EC4214DDF6" xlink:to="loc_spxc_BalckeDurrBusinessMember_4DD3F46498C0A6670AFEE3EC4214A79E" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SPXFlowIncMember" xlink:label="loc_spxc_SPXFlowIncMember_CF126727AAB481F84FCAE3EC4215F8AE" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_A0D869D55170C2015EAFE3EC4214DDF6" xlink:to="loc_spxc_SPXFlowIncMember_CF126727AAB481F84FCAE3EC4215F8AE" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_IndividuallyImmaterialDisposalGroupsIncludingDiscontinuedOperationsMember" xlink:label="loc_spxc_IndividuallyImmaterialDisposalGroupsIncludingDiscontinuedOperationsMember_9C70B2F14CB198DDF465E3EC421572E6" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_A0D869D55170C2015EAFE3EC4214DDF6" xlink:to="loc_spxc_IndividuallyImmaterialDisposalGroupsIncludingDiscontinuedOperationsMember_9C70B2F14CB198DDF465E3EC421572E6" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DryCoolingBusinessMember" xlink:label="loc_spxc_DryCoolingBusinessMember_794C2F529D11955E70EFE3EC421544B5" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_A0D869D55170C2015EAFE3EC4214DDF6" xlink:to="loc_spxc_DryCoolingBusinessMember_794C2F529D11955E70EFE3EC421544B5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_F0C48C1823238CD3BA7BE3EC4215F91C" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_37DCA4C01A2F0039B235E3EC42100DAD" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_F0C48C1823238CD3BA7BE3EC4215F91C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_54EE7BD104A91CB780EFE3EC42154047_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_F0C48C1823238CD3BA7BE3EC4215F91C" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_54EE7BD104A91CB780EFE3EC42154047_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_54EE7BD104A91CB780EFE3EC42154047" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_F0C48C1823238CD3BA7BE3EC4215F91C" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_54EE7BD104A91CB780EFE3EC42154047" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfBySaleMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_2EE5ED92ADE245A311C0E3EC4216E909" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_54EE7BD104A91CB780EFE3EC42154047" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_2EE5ED92ADE245A311C0E3EC4216E909" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember_C66DE6C967B47C4ECF16E3EC42164E99" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_54EE7BD104A91CB780EFE3EC42154047" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember_C66DE6C967B47C4ECF16E3EC42164E99" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember" xlink:label="loc_us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember_4FB4D1C88AF26BDE67ADE3EC421623D5" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_54EE7BD104A91CB780EFE3EC42154047" xlink:to="loc_us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember_4FB4D1C88AF26BDE67ADE3EC421623D5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_2C6A7121D0A5A0B1C008E3EC4217BD83" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_6DCEE7377F2646D685B4E3EC42178F28" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_2C6A7121D0A5A0B1C008E3EC4217BD83" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod" xlink:label="loc_us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod_499C9104BEEB097E826DE3EC42174899" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_6DCEE7377F2646D685B4E3EC42178F28" xlink:to="loc_us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod_499C9104BEEB097E826DE3EC42174899" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_BE2ED8F2A3E07BED6AD1E3EC42177DB7" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_6DCEE7377F2646D685B4E3EC42178F28" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_BE2ED8F2A3E07BED6AD1E3EC42177DB7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_7AD3140EEBDFAEB66218E3EC42179D73" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_6DCEE7377F2646D685B4E3EC42178F28" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_7AD3140EEBDFAEB66218E3EC42179D73" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationAmountOfAdjustmentToPriorPeriodGainLossOnDisposalNetOfTax" xlink:label="loc_us-gaap_DiscontinuedOperationAmountOfAdjustmentToPriorPeriodGainLossOnDisposalNetOfTax_CDD708E3AC34814F9581E3EC42186324" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_6DCEE7377F2646D685B4E3EC42178F28" xlink:to="loc_us-gaap_DiscontinuedOperationAmountOfAdjustmentToPriorPeriodGainLossOnDisposalNetOfTax_CDD708E3AC34814F9581E3EC42186324" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromDivestitureOfBusinessesNetOfCashDivested" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinessesNetOfCashDivested_DEA97A3B2309F1AF8BCBE3EC42181778" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_6DCEE7377F2646D685B4E3EC42178F28" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinessesNetOfCashDivested_DEA97A3B2309F1AF8BCBE3EC42181778" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashDivestedFromDeconsolidation" xlink:label="loc_us-gaap_CashDivestedFromDeconsolidation_9912F6A796FE53BD44BCE3EC421924E9" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_6DCEE7377F2646D685B4E3EC42178F28" xlink:to="loc_us-gaap_CashDivestedFromDeconsolidation_9912F6A796FE53BD44BCE3EC421924E9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnSaleOfBusiness" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_A41C4071AC4E5891722BE3EC42197D38" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_6DCEE7377F2646D685B4E3EC42178F28" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_A41C4071AC4E5891722BE3EC42197D38" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/AcquisitionsDiscontinuedOperationsAndOtherDispositionsResultsOfOperationsDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_F56D60D01A8F415F4D5F6214CBA33563" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_C200F3E225C116346F366214CBA15984" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_F56D60D01A8F415F4D5F6214CBA33563" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_C200F3E225C116346F366214CBA15984" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BA00723C27105A8357326214CBA1A1D5" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_C200F3E225C116346F366214CBA15984" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BA00723C27105A8357326214CBA1A1D5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_41E55EA690EEF15007C46214CBA29BC7_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BA00723C27105A8357326214CBA1A1D5" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_41E55EA690EEF15007C46214CBA29BC7_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_41E55EA690EEF15007C46214CBA29BC7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BA00723C27105A8357326214CBA1A1D5" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_41E55EA690EEF15007C46214CBA29BC7" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BalckeDurrBusinessMember" xlink:label="loc_spxc_BalckeDurrBusinessMember_A8FC657EF74428ADFE966214CBA2B171" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_41E55EA690EEF15007C46214CBA29BC7" xlink:to="loc_spxc_BalckeDurrBusinessMember_A8FC657EF74428ADFE966214CBA2B171" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ALLOtherDiscontinuedOperationsMember" xlink:label="loc_spxc_ALLOtherDiscontinuedOperationsMember_83AF2D383C58FEC44B166214CBA296D8" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_41E55EA690EEF15007C46214CBA29BC7" xlink:to="loc_spxc_ALLOtherDiscontinuedOperationsMember_83AF2D383C58FEC44B166214CBA296D8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_04EFA07B97358CE5DB096214CBA20BDC" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_C200F3E225C116346F366214CBA15984" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_04EFA07B97358CE5DB096214CBA20BDC" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_339A8CEB9841142021F56214CBA26CC7_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_04EFA07B97358CE5DB096214CBA20BDC" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_339A8CEB9841142021F56214CBA26CC7_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_339A8CEB9841142021F56214CBA26CC7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_04EFA07B97358CE5DB096214CBA20BDC" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_339A8CEB9841142021F56214CBA26CC7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfBySaleMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_EFB464A8BCE3D21D84E46214CBA30B9C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_339A8CEB9841142021F56214CBA26CC7" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_EFB464A8BCE3D21D84E46214CBA30B9C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_830B40A2BA21860977E26214CBA3A20F" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_F56D60D01A8F415F4D5F6214CBA33563" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_830B40A2BA21860977E26214CBA3A20F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation" xlink:label="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_72B366F32BC572027D836214CBA37503" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_F56D60D01A8F415F4D5F6214CBA33563" xlink:to="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_72B366F32BC572027D836214CBA37503" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_763771A1B75090AE80156214CBA4FCEC" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_F56D60D01A8F415F4D5F6214CBA33563" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_763771A1B75090AE80156214CBA4FCEC" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/AcquisitionsDiscontinuedOperationsAndOtherDispositionsSaleOfBlackeDurrBusinessDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_AA98FA7C2ED1B953586CDF25E9FFAF55" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_D3E3B85C98F222EE42A0DF25E9F9943A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_AA98FA7C2ED1B953586CDF25E9FFAF55" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_D3E3B85C98F222EE42A0DF25E9F9943A" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_FBD4539528294C148156DF25E9F95519" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_D3E3B85C98F222EE42A0DF25E9F9943A" xlink:to="loc_dei_LegalEntityAxis_FBD4539528294C148156DF25E9F95519" xlink:type="arc"/>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_5BB08237064D0A5ADCE8DF25E9F93E89_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_FBD4539528294C148156DF25E9F95519" xlink:to="loc_dei_EntityDomain_5BB08237064D0A5ADCE8DF25E9F93E89_default" xlink:type="arc"/>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_5BB08237064D0A5ADCE8DF25E9F93E89" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_FBD4539528294C148156DF25E9F95519" xlink:to="loc_dei_EntityDomain_5BB08237064D0A5ADCE8DF25E9F93E89" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BalckeDurrGmbHMember" xlink:label="loc_spxc_BalckeDurrGmbHMember_6EF77840D96EF696E091DF25E9FA4F19" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_5BB08237064D0A5ADCE8DF25E9F93E89" xlink:to="loc_spxc_BalckeDurrGmbHMember_6EF77840D96EF696E091DF25E9FA4F19" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_MutaresAGMember" xlink:label="loc_spxc_MutaresAGMember_93F5CBB2A3B39A652E59DF25E9FBBC3B" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_5BB08237064D0A5ADCE8DF25E9F93E89" xlink:to="loc_spxc_MutaresAGMember_93F5CBB2A3B39A652E59DF25E9FBBC3B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsByNatureAxis" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis_61B5EFC6B29F17532967DF25E9FB99FB" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_D3E3B85C98F222EE42A0DF25E9F9943A" xlink:to="loc_us-gaap_GuaranteeObligationsByNatureAxis_61B5EFC6B29F17532967DF25E9FB99FB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_85FD16972D5A841772F4DF25E9FBB107_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_61B5EFC6B29F17532967DF25E9FB99FB" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_85FD16972D5A841772F4DF25E9FBB107_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_61B5EFC6B29F17532967DF25E9FB99FB" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_85FD16972D5A841772F4DF25E9FBB107" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BankandSuretyBondsMember" xlink:label="loc_spxc_BankandSuretyBondsMember_4A6ED8054EFE6577C20BDF25E9FB4E2E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_85FD16972D5A841772F4DF25E9FBB107" xlink:to="loc_spxc_BankandSuretyBondsMember_4A6ED8054EFE6577C20BDF25E9FB4E2E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndemnificationGuaranteeMember" xlink:label="loc_us-gaap_IndemnificationGuaranteeMember_3B28398DBB09FB945593DF25E9FC54E8" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_85FD16972D5A841772F4DF25E9FBB107" xlink:to="loc_us-gaap_IndemnificationGuaranteeMember_3B28398DBB09FB945593DF25E9FC54E8" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_GuaranteesandBondsMember" xlink:label="loc_spxc_GuaranteesandBondsMember_21D873B0FD44CF9ED3A5DF25E9FC636A" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_85FD16972D5A841772F4DF25E9FBB107" xlink:to="loc_spxc_GuaranteesandBondsMember_21D873B0FD44CF9ED3A5DF25E9FC636A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CounterpartyNameAxis" xlink:label="loc_srt_CounterpartyNameAxis_D3D3934286DC7B4BEA8DDF25E9FC9C85" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_D3E3B85C98F222EE42A0DF25E9F9943A" xlink:to="loc_srt_CounterpartyNameAxis_D3D3934286DC7B4BEA8DDF25E9FC9C85" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9D8836083A7D6193B52FDF25E9FC4159_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_D3D3934286DC7B4BEA8DDF25E9FC9C85" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9D8836083A7D6193B52FDF25E9FC4159_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_D3D3934286DC7B4BEA8DDF25E9FC9C85" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9D8836083A7D6193B52FDF25E9FC4159" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SubsidiaryofmutaresAGtheBuyerMember" xlink:label="loc_spxc_SubsidiaryofmutaresAGtheBuyerMember_A2F87311524FEBA4061DDF25E9FD1992" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9D8836083A7D6193B52FDF25E9FC4159" xlink:to="loc_spxc_SubsidiaryofmutaresAGtheBuyerMember_A2F87311524FEBA4061DDF25E9FD1992" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SPXCMember" xlink:label="loc_spxc_SPXCMember_4B920F791ECE365C5122DF25E9FD7753" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9D8836083A7D6193B52FDF25E9FC4159" xlink:to="loc_spxc_SPXCMember_4B920F791ECE365C5122DF25E9FD7753" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_D453CF40AD9E30E12177DF25E9FD7F79" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_D3E3B85C98F222EE42A0DF25E9F9943A" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_D453CF40AD9E30E12177DF25E9FD7F79" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_2401EADD825BAAAB9300DF25E9FD88A2_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_D453CF40AD9E30E12177DF25E9FD7F79" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_2401EADD825BAAAB9300DF25E9FD88A2_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_2401EADD825BAAAB9300DF25E9FD88A2" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_D453CF40AD9E30E12177DF25E9FD7F79" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_2401EADD825BAAAB9300DF25E9FD88A2" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BalckeDurrBusinessMember" xlink:label="loc_spxc_BalckeDurrBusinessMember_4B58AC06CADBE322B292DF25E9FDE9D2" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_2401EADD825BAAAB9300DF25E9FD88A2" xlink:to="loc_spxc_BalckeDurrBusinessMember_4B58AC06CADBE322B292DF25E9FDE9D2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_5B97EFBCD3489585C864DF25E9FE9959" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_D3E3B85C98F222EE42A0DF25E9F9943A" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_5B97EFBCD3489585C864DF25E9FE9959" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_9615CCE999A19FE995BFDF25E9FE68F9_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_5B97EFBCD3489585C864DF25E9FE9959" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_9615CCE999A19FE995BFDF25E9FE68F9_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_9615CCE999A19FE995BFDF25E9FE68F9" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_5B97EFBCD3489585C864DF25E9FE9959" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_9615CCE999A19FE995BFDF25E9FE68F9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfBySaleMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_B3E8427A531B93299031DF25E9FF9112" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_9615CCE999A19FE995BFDF25E9FE68F9" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_B3E8427A531B93299031DF25E9FF9112" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromDivestitureOfBusinessesNetOfCashDivested" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinessesNetOfCashDivested_96609952807094239325DF25E9FF4D68" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_AA98FA7C2ED1B953586CDF25E9FFAF55" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinessesNetOfCashDivested_96609952807094239325DF25E9FF4D68" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashDivestedFromDeconsolidation" xlink:label="loc_us-gaap_CashDivestedFromDeconsolidation_9EE5F46AD0EDF7F0EF3ADF25E9FFF5BD" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_AA98FA7C2ED1B953586CDF25E9FFAF55" xlink:to="loc_us-gaap_CashDivestedFromDeconsolidation_9EE5F46AD0EDF7F0EF3ADF25E9FFF5BD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_9F7DF827A91193A4A445DF25EA00B96E" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_AA98FA7C2ED1B953586CDF25E9FFAF55" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_9F7DF827A91193A4A445DF25EA00B96E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsMaximumExposure" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_C0455F19742FDE484E0DDF25EA00D004" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_AA98FA7C2ED1B953586CDF25E9FFAF55" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_C0455F19742FDE484E0DDF25EA00D004" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCollateralForBorrowedSecurities" xlink:label="loc_us-gaap_CashCollateralForBorrowedSecurities_E34ABD49F8B39A25A5F9DF25EA0093FB" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_AA98FA7C2ED1B953586CDF25E9FFAF55" xlink:to="loc_us-gaap_CashCollateralForBorrowedSecurities_E34ABD49F8B39A25A5F9DF25EA0093FB" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/AcquisitionsDiscontinuedOperationsAndOtherDispositionsTables" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_95F8F67F998F5A61E2216214CBE6204A" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_9593727EDCCAAE082CCA6214CBE560F4" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_95F8F67F998F5A61E2216214CBE6204A" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_9593727EDCCAAE082CCA6214CBE560F4" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_B19AA64C0F2499EBA05A6214CBE5619C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_9593727EDCCAAE082CCA6214CBE560F4" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_B19AA64C0F2499EBA05A6214CBE5619C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_BB0FCEE5C829FA8D080B6214CBE5BC26_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_B19AA64C0F2499EBA05A6214CBE5619C" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_BB0FCEE5C829FA8D080B6214CBE5BC26_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_BB0FCEE5C829FA8D080B6214CBE5BC26" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_B19AA64C0F2499EBA05A6214CBE5619C" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_BB0FCEE5C829FA8D080B6214CBE5BC26" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BalckeDurrBusinessMember" xlink:label="loc_spxc_BalckeDurrBusinessMember_8C32C8FEF178F8351A2B6214CBE5F797" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_BB0FCEE5C829FA8D080B6214CBE5BC26" xlink:to="loc_spxc_BalckeDurrBusinessMember_8C32C8FEF178F8351A2B6214CBE5F797" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_154787F057FAA7D815DA6214CBE65878" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_95F8F67F998F5A61E2216214CBE6204A" xlink:to="loc_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_154787F057FAA7D815DA6214CBE65878" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationTextBlock" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaInformationTextBlock_DDBB134DD66BDD8E975C6214CBE6BF49" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_95F8F67F998F5A61E2216214CBE6204A" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaInformationTextBlock_DDBB134DD66BDD8E975C6214CBE6BF49" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock" xlink:label="loc_us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock_5FD3F99ADDAC0C82BFFA6214CBE6E6FB" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_95F8F67F998F5A61E2216214CBE6204A" xlink:to="loc_us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock_5FD3F99ADDAC0C82BFFA6214CBE6E6FB" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPolicies" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesDetail" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_90B9136AC2B0732B0055DF5746CE624A" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_777846E895EBCB2E9641DF5746C1645D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_90B9136AC2B0732B0055DF5746CE624A" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_777846E895EBCB2E9641DF5746C1645D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_CD2663F838C0001CF124DF5746C1269B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_777846E895EBCB2E9641DF5746C1645D" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_CD2663F838C0001CF124DF5746C1269B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_28AC60BF3614191BA717DF5746C1333B_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_CD2663F838C0001CF124DF5746C1269B" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_28AC60BF3614191BA717DF5746C1333B_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_28AC60BF3614191BA717DF5746C1333B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_CD2663F838C0001CF124DF5746C1269B" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_28AC60BF3614191BA717DF5746C1333B" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SchonstedtInstrumentCompanyMember" xlink:label="loc_spxc_SchonstedtInstrumentCompanyMember_27DF158587D78D256F9FDF5746C2425A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_28AC60BF3614191BA717DF5746C1333B" xlink:to="loc_spxc_SchonstedtInstrumentCompanyMember_27DF158587D78D256F9FDF5746C2425A" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_CuesInc.Member" xlink:label="loc_spxc_CuesInc.Member_80D5E7FB33FF5C9497CBDF5746C2C7CD" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_28AC60BF3614191BA717DF5746C1333B" xlink:to="loc_spxc_CuesInc.Member_80D5E7FB33FF5C9497CBDF5746C2C7CD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_4113CC99E5ED2165B0ABDF5746C235EF" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_777846E895EBCB2E9641DF5746C1645D" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_4113CC99E5ED2165B0ABDF5746C235EF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_25D0993B2E89AEC4BB87DF5746C226E7_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_4113CC99E5ED2165B0ABDF5746C235EF" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_25D0993B2E89AEC4BB87DF5746C226E7_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_25D0993B2E89AEC4BB87DF5746C226E7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_4113CC99E5ED2165B0ABDF5746C235EF" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_25D0993B2E89AEC4BB87DF5746C226E7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="loc_us-gaap_CostOfSalesMember_261DFD4C132120EBB770DF5746C3038D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_25D0993B2E89AEC4BB87DF5746C226E7" xlink:to="loc_us-gaap_CostOfSalesMember_261DFD4C132120EBB770DF5746C3038D" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SpecialChargesNetMember" xlink:label="loc_spxc_SpecialChargesNetMember_5318CC5E444D150E0AE4DF5746C3B185" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_25D0993B2E89AEC4BB87DF5746C226E7" xlink:to="loc_spxc_SpecialChargesNetMember_5318CC5E444D150E0AE4DF5746C3B185" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CounterpartyNameAxis" xlink:label="loc_srt_CounterpartyNameAxis_EBC30A8A9ADC1607ECF3DF5746C343F3" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_777846E895EBCB2E9641DF5746C1645D" xlink:to="loc_srt_CounterpartyNameAxis_EBC30A8A9ADC1607ECF3DF5746C343F3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_3C30FE9F5C0DD80BA74BDF5746C4BB16_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_EBC30A8A9ADC1607ECF3DF5746C343F3" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_3C30FE9F5C0DD80BA74BDF5746C4BB16_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_3C30FE9F5C0DD80BA74BDF5746C4BB16" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_EBC30A8A9ADC1607ECF3DF5746C343F3" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_3C30FE9F5C0DD80BA74BDF5746C4BB16" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SubsidiaryofmutaresAGtheBuyerMember" xlink:label="loc_spxc_SubsidiaryofmutaresAGtheBuyerMember_89025F3A012F89822E76DF5746C47A42" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_3C30FE9F5C0DD80BA74BDF5746C4BB16" xlink:to="loc_spxc_SubsidiaryofmutaresAGtheBuyerMember_89025F3A012F89822E76DF5746C47A42" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BF582C532391BE5B6E63DF5746C42673" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_777846E895EBCB2E9641DF5746C1645D" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BF582C532391BE5B6E63DF5746C42673" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_5EB7E1EFD19ADB17F048DF5746C4F234_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BF582C532391BE5B6E63DF5746C42673" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_5EB7E1EFD19ADB17F048DF5746C4F234_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_5EB7E1EFD19ADB17F048DF5746C4F234" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BF582C532391BE5B6E63DF5746C42673" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_5EB7E1EFD19ADB17F048DF5746C4F234" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BalckeDurrBusinessMember" xlink:label="loc_spxc_BalckeDurrBusinessMember_7D574F28EDD697D92239DF5746CAE003" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_5EB7E1EFD19ADB17F048DF5746C4F234" xlink:to="loc_spxc_BalckeDurrBusinessMember_7D574F28EDD697D92239DF5746CAE003" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SPXHeatTransferBusinessMember" xlink:label="loc_spxc_SPXHeatTransferBusinessMember_0FD9D4DEAA1C15811C8DDF5746CA8C47" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_5EB7E1EFD19ADB17F048DF5746C4F234" xlink:to="loc_spxc_SPXHeatTransferBusinessMember_0FD9D4DEAA1C15811C8DDF5746CA8C47" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_4EA112AA96272B981AA1DF5746CAFB13" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_777846E895EBCB2E9641DF5746C1645D" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_4EA112AA96272B981AA1DF5746CAFB13" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_D4159A4A068A49295022DF5746CB0146_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_4EA112AA96272B981AA1DF5746CAFB13" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_D4159A4A068A49295022DF5746CB0146_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_D4159A4A068A49295022DF5746CB0146" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_4EA112AA96272B981AA1DF5746CAFB13" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_D4159A4A068A49295022DF5746CB0146" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfBySaleMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_B44BEAFAA53FCAF41B87DF5746CBB7E1" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_D4159A4A068A49295022DF5746CB0146" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_B44BEAFAA53FCAF41B87DF5746CBB7E1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationsMember" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationsMember_EED5373EAAC4B2DA4799DF5746CC4D9D" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_D4159A4A068A49295022DF5746CB0146" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationsMember_EED5373EAAC4B2DA4799DF5746CC4D9D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="loc_us-gaap_SubsegmentsAxis_DA8D13592C805A1EC86FDF5746CC1A84" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_777846E895EBCB2E9641DF5746C1645D" xlink:to="loc_us-gaap_SubsegmentsAxis_DA8D13592C805A1EC86FDF5746CC1A84" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_715A8CF7EC9B2BF36E03DF5746CC1CC3_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_DA8D13592C805A1EC86FDF5746CC1A84" xlink:to="loc_us-gaap_SubsegmentsDomain_715A8CF7EC9B2BF36E03DF5746CC1CC3_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_DA8D13592C805A1EC86FDF5746CC1A84" xlink:to="loc_us-gaap_SubsegmentsDomain_715A8CF7EC9B2BF36E03DF5746CC1CC3" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BalckeDurrBusinessMember" xlink:label="loc_spxc_BalckeDurrBusinessMember_37E3E7B532C57D555A99DF5746CC3D70" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_715A8CF7EC9B2BF36E03DF5746CC1CC3" xlink:to="loc_spxc_BalckeDurrBusinessMember_37E3E7B532C57D555A99DF5746CC3D70" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_BAD7B270A3B4E0A7B98FDF5746CC6F02" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_777846E895EBCB2E9641DF5746C1645D" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_BAD7B270A3B4E0A7B98FDF5746CC6F02" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_D22611D2240B3C891C30DF5746CDE05B_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_BAD7B270A3B4E0A7B98FDF5746CC6F02" xlink:to="loc_us-gaap_SegmentDomain_D22611D2240B3C891C30DF5746CDE05B_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_BAD7B270A3B4E0A7B98FDF5746CC6F02" xlink:to="loc_us-gaap_SegmentDomain_D22611D2240B3C891C30DF5746CDE05B" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_EngineeredSolutionsReportableSegmentMember" xlink:label="loc_spxc_EngineeredSolutionsReportableSegmentMember_DEB03091BC297B5FC772DF5746CD494E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_D22611D2240B3C891C30DF5746CDE05B" xlink:to="loc_spxc_EngineeredSolutionsReportableSegmentMember_DEB03091BC297B5FC772DF5746CD494E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_78EA49A4DBB4035DB448DF5746CD1E0A" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_777846E895EBCB2E9641DF5746C1645D" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_78EA49A4DBB4035DB448DF5746CD1E0A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_E2D7564DA220F905C527DF5746CDB131_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_78EA49A4DBB4035DB448DF5746CD1E0A" xlink:to="loc_us-gaap_EquityComponentDomain_E2D7564DA220F905C527DF5746CDB131_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_E2D7564DA220F905C527DF5746CDB131" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_78EA49A4DBB4035DB448DF5746CD1E0A" xlink:to="loc_us-gaap_EquityComponentDomain_E2D7564DA220F905C527DF5746CDB131" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="loc_us-gaap_TreasuryStockMember_0EDA02DF6416EAE10FA3DF5746CEE9BF" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_E2D7564DA220F905C527DF5746CDB131" xlink:to="loc_us-gaap_TreasuryStockMember_0EDA02DF6416EAE10FA3DF5746CEE9BF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_21DCE76E556A465787E0DF5746CE6931" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_E2D7564DA220F905C527DF5746CDB131" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_21DCE76E556A465787E0DF5746CE6931" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_3698F9ACF1F73CCFCBD6DF5746CE6575" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_E2D7564DA220F905C527DF5746CDB131" xlink:to="loc_us-gaap_RetainedEarningsMember_3698F9ACF1F73CCFCBD6DF5746CE6575" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_E605648BDB57FA29176BDF5746CFDCF3" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_90B9136AC2B0732B0055DF5746CE624A" xlink:to="loc_us-gaap_NetIncomeLoss_E605648BDB57FA29176BDF5746CFDCF3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_156B006FA31EDC1A0E15DF5746CF5A9A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_90B9136AC2B0732B0055DF5746CE624A" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_156B006FA31EDC1A0E15DF5746CF5A9A" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DisposalGroupNotDiscontinuedOperationWindDownCharges" xlink:label="loc_spxc_DisposalGroupNotDiscontinuedOperationWindDownCharges_5F60871C0E3081B114A8DF5746CF9E06" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_90B9136AC2B0732B0055DF5746CE624A" xlink:to="loc_spxc_DisposalGroupNotDiscontinuedOperationWindDownCharges_5F60871C0E3081B114A8DF5746CF9E06" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown_0AD9976B1E74F49890BCDF5746D02246" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_90B9136AC2B0732B0055DF5746CE624A" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown_0AD9976B1E74F49890BCDF5746D02246" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DisposalGroupNotDiscontinuedOperationAssetImpairment" xlink:label="loc_spxc_DisposalGroupNotDiscontinuedOperationAssetImpairment_37CD0729F7FE8F3EB21CDF5746D0AAB9" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_90B9136AC2B0732B0055DF5746CE624A" xlink:to="loc_spxc_DisposalGroupNotDiscontinuedOperationAssetImpairment_37CD0729F7FE8F3EB21CDF5746D0AAB9" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DisposalGroupNotDiscontinuedOperationSeveranceCosts" xlink:label="loc_spxc_DisposalGroupNotDiscontinuedOperationSeveranceCosts_9E9EC19CB0BFEABC392BDF5746D09F38" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_90B9136AC2B0732B0055DF5746CE624A" xlink:to="loc_spxc_DisposalGroupNotDiscontinuedOperationSeveranceCosts_9E9EC19CB0BFEABC392BDF5746D09F38" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleOfIntangibleAssets" xlink:label="loc_us-gaap_ProceedsFromSaleOfIntangibleAssets_4BC30037FBE7ABD0903ADF5746D0108C" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_90B9136AC2B0732B0055DF5746CE624A" xlink:to="loc_us-gaap_ProceedsFromSaleOfIntangibleAssets_4BC30037FBE7ABD0903ADF5746D0108C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnDispositionOfIntangibleAssets" xlink:label="loc_us-gaap_GainLossOnDispositionOfIntangibleAssets_DF1EB7E8DDB30A88CE96DF5746D0E457" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_90B9136AC2B0732B0055DF5746CE624A" xlink:to="loc_us-gaap_GainLossOnDispositionOfIntangibleAssets_DF1EB7E8DDB30A88CE96DF5746D0E457" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_222560DE0ECE22B7DBD8DF5746D11187" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_90B9136AC2B0732B0055DF5746CE624A" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_222560DE0ECE22B7DBD8DF5746D11187" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAcquiredFromAcquisition" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_4C42D123921D0C1B728BDF5746D120E5" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_90B9136AC2B0732B0055DF5746CE624A" xlink:to="loc_us-gaap_CashAcquiredFromAcquisition_4C42D123921D0C1B728BDF5746D120E5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockSharesRetired" xlink:label="loc_us-gaap_TreasuryStockSharesRetired_4D9CBE76220E829DA7D8DF5746D17DF2" xlink:type="locator"/>

<link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_90B9136AC2B0732B0055DF5746CE624A" xlink:to="loc_us-gaap_TreasuryStockSharesRetired_4D9CBE76220E829DA7D8DF5746D17DF2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockRetiredParValueMethodAmount" xlink:label="loc_us-gaap_TreasuryStockRetiredParValueMethodAmount_C57D1BE8E79721CD415FDF5746D14E1E" xlink:type="locator"/>

<link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_90B9136AC2B0732B0055DF5746CE624A" xlink:to="loc_us-gaap_TreasuryStockRetiredParValueMethodAmount_C57D1BE8E79721CD415FDF5746D14E1E" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPropertyPlantAndEquipmentDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_183A39F26497E88D79506214CC2EBFC5" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A06D5134D6EBC080BC446214CC2C90F0" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_183A39F26497E88D79506214CC2EBFC5" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A06D5134D6EBC080BC446214CC2C90F0" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D2A5DBBADBEC12E547836214CC2DD2A3" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A06D5134D6EBC080BC446214CC2C90F0" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D2A5DBBADBEC12E547836214CC2DD2A3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3FB50EB0BBBDF33012F16214CC2D12C1_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D2A5DBBADBEC12E547836214CC2DD2A3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3FB50EB0BBBDF33012F16214CC2D12C1_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3FB50EB0BBBDF33012F16214CC2D12C1" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D2A5DBBADBEC12E547836214CC2DD2A3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3FB50EB0BBBDF33012F16214CC2D12C1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BuildingMember" xlink:label="loc_us-gaap_BuildingMember_B6B9AAC637B5FBAF6F966214CC2D893A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3FB50EB0BBBDF33012F16214CC2D12C1" xlink:to="loc_us-gaap_BuildingMember_B6B9AAC637B5FBAF6F966214CC2D893A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MachineryAndEquipmentMember" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_B254997F99CEB2F2AF576214CC2DAC36" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3FB50EB0BBBDF33012F16214CC2D12C1" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_B254997F99CEB2F2AF576214CC2DAC36" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_5A0B1FF44318E2F6B5C26214CC2E25EE" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A06D5134D6EBC080BC446214CC2C90F0" xlink:to="loc_srt_RangeAxis_5A0B1FF44318E2F6B5C26214CC2E25EE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_3C1119F2E07941FEA8E96214CC2E84D8_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_5A0B1FF44318E2F6B5C26214CC2E25EE" xlink:to="loc_srt_RangeMember_3C1119F2E07941FEA8E96214CC2E84D8_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_3C1119F2E07941FEA8E96214CC2E84D8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_5A0B1FF44318E2F6B5C26214CC2E25EE" xlink:to="loc_srt_RangeMember_3C1119F2E07941FEA8E96214CC2E84D8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_566E539BA25C361F40BF6214CC2E5742" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_3C1119F2E07941FEA8E96214CC2E84D8" xlink:to="loc_srt_MaximumMember_566E539BA25C361F40BF6214CC2E5742" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_5BF65C8854C358EC7AC66214CC2EC56A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_3C1119F2E07941FEA8E96214CC2E84D8" xlink:to="loc_srt_MinimumMember_5BF65C8854C358EC7AC66214CC2EC56A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_C3B0E117E4B4C172BA796214CC2F0F02" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_183A39F26497E88D79506214CC2EBFC5" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_C3B0E117E4B4C172BA796214CC2F0F02" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DepreciationExpenseAndAmortizationOfCapitalLeases" xlink:label="loc_spxc_DepreciationExpenseAndAmortizationOfCapitalLeases_5F70FA98CDDDF97BF60A6214CC2FCD06" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_183A39F26497E88D79506214CC2EBFC5" xlink:to="loc_spxc_DepreciationExpenseAndAmortizationOfCapitalLeases_5F70FA98CDDDF97BF60A6214CC2FCD06" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestCostsIncurredCapitalized" xlink:label="loc_us-gaap_InterestCostsIncurredCapitalized_BDA7E288F8486D0BC8C06214CC2F2697" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_183A39F26497E88D79506214CC2EBFC5" xlink:to="loc_us-gaap_InterestCostsIncurredCapitalized_BDA7E288F8486D0BC8C06214CC2F2697" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesResearchAndDevelopmentDetails" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesRevenueRecognitionDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_4E32C60F224FCAAC5C36E3640D9E053B" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_2E2C2BAABF1473874EC6E3640D95C6F8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_4E32C60F224FCAAC5C36E3640D9E053B" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_2E2C2BAABF1473874EC6E3640D95C6F8" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_57E955C1A18375A3194CE3640D96C234" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_2E2C2BAABF1473874EC6E3640D95C6F8" xlink:to="loc_srt_StatementGeographicalAxis_57E955C1A18375A3194CE3640D96C234" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_EC3FDBA0ED41352072E7E3640D964B9F_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_57E955C1A18375A3194CE3640D96C234" xlink:to="loc_srt_SegmentGeographicalDomain_EC3FDBA0ED41352072E7E3640D964B9F_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_57E955C1A18375A3194CE3640D96C234" xlink:to="loc_srt_SegmentGeographicalDomain_EC3FDBA0ED41352072E7E3640D964B9F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_ZA" xlink:label="loc_country_ZA_4543A7D701CD67825BBEE3640D964636" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_EC3FDBA0ED41352072E7E3640D964B9F" xlink:to="loc_country_ZA_4543A7D701CD67825BBEE3640D964636" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="loc_us-gaap_TypeOfArrangementAxis_29D17143E230979EE2B7E3640D97AEDF" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_2E2C2BAABF1473874EC6E3640D95C6F8" xlink:to="loc_us-gaap_TypeOfArrangementAxis_29D17143E230979EE2B7E3640D97AEDF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_11B26DF8D882367149AFE3640D97F8E3_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TypeOfArrangementAxis_29D17143E230979EE2B7E3640D97AEDF" xlink:to="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_11B26DF8D882367149AFE3640D97F8E3_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TypeOfArrangementAxis_29D17143E230979EE2B7E3640D97AEDF" xlink:to="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_11B26DF8D882367149AFE3640D97F8E3" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_LargePowerProjectsMember" xlink:label="loc_spxc_LargePowerProjectsMember_409864E397F1AB8FB4FDE3640D97ACD8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_11B26DF8D882367149AFE3640D97F8E3" xlink:to="loc_spxc_LargePowerProjectsMember_409864E397F1AB8FB4FDE3640D97ACD8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_361CE55F68C16B8261ECE3640D981F3A" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_2E2C2BAABF1473874EC6E3640D95C6F8" xlink:to="loc_us-gaap_StatementScenarioAxis_361CE55F68C16B8261ECE3640D981F3A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_417A888B1BC8CD5923A0E3640D98D5B2_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_361CE55F68C16B8261ECE3640D981F3A" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_417A888B1BC8CD5923A0E3640D98D5B2_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_361CE55F68C16B8261ECE3640D981F3A" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_417A888B1BC8CD5923A0E3640D98D5B2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioForecastMember" xlink:label="loc_us-gaap_ScenarioForecastMember_802B76CB95791B72EF5BE3640D988B5B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_417A888B1BC8CD5923A0E3640D98D5B2" xlink:to="loc_us-gaap_ScenarioForecastMember_802B76CB95791B72EF5BE3640D988B5B" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_RevenueUnderPercentageOfCompletionMethod" xlink:label="loc_spxc_RevenueUnderPercentageOfCompletionMethod_DF4191F4145088224AC7E3640D9ECEFB" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_4E32C60F224FCAAC5C36E3640D9E053B" xlink:to="loc_spxc_RevenueUnderPercentageOfCompletionMethod_DF4191F4145088224AC7E3640D9ECEFB" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_CostsIncurredOnUncompletedContracts" xlink:label="loc_spxc_CostsIncurredOnUncompletedContracts_84AEAC17DC8943374EA8E3640D9F6A8C" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_4E32C60F224FCAAC5C36E3640D9E053B" xlink:to="loc_spxc_CostsIncurredOnUncompletedContracts_84AEAC17DC8943374EA8E3640D9F6A8C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_EstimatedEarningsToDate" xlink:label="loc_spxc_EstimatedEarningsToDate_E8DD241BB1DBC849E5D1E3640D9FE815" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_4E32C60F224FCAAC5C36E3640D9E053B" xlink:to="loc_spxc_EstimatedEarningsToDate_E8DD241BB1DBC849E5D1E3640D9FE815" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_AggregateCostsIncurredOnUncompletedContractsAndEstimatedEarningsToDate" xlink:label="loc_spxc_AggregateCostsIncurredOnUncompletedContractsAndEstimatedEarningsToDate_41E087962F90F3E5C069E3640DA0172C" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_4E32C60F224FCAAC5C36E3640D9E053B" xlink:to="loc_spxc_AggregateCostsIncurredOnUncompletedContractsAndEstimatedEarningsToDate_41E087962F90F3E5C069E3640DA0172C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BillingsToDate" xlink:label="loc_spxc_BillingsToDate_2A5A0AD14BC0774EDCF0E3640DA052C0" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_4E32C60F224FCAAC5C36E3640D9E053B" xlink:to="loc_spxc_BillingsToDate_2A5A0AD14BC0774EDCF0E3640DA052C0" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_NetBillingsInExcessOfBillingsAfterAcquisition" xlink:label="loc_spxc_NetBillingsInExcessOfBillingsAfterAcquisition_DF87A5D57A6BBE7EE242E3640DA0FAA2" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_4E32C60F224FCAAC5C36E3640D9E053B" xlink:to="loc_spxc_NetBillingsInExcessOfBillingsAfterAcquisition_DF87A5D57A6BBE7EE242E3640DA0FAA2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrPrograms" xlink:label="loc_us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrPrograms_91E0949B722E204ECBAAE3640DA08433" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_4E32C60F224FCAAC5C36E3640D9E053B" xlink:to="loc_us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrPrograms_91E0949B722E204ECBAAE3640DA08433" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BillingsInExcessOfCost" xlink:label="loc_us-gaap_BillingsInExcessOfCost_E84D799E4171C8E4F7EBE3640DA05C10" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_4E32C60F224FCAAC5C36E3640D9E053B" xlink:to="loc_us-gaap_BillingsInExcessOfCost_E84D799E4171C8E4F7EBE3640DA05C10" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_NetBillingsInExcessOfCostsAndEstimatedEarnings" xlink:label="loc_spxc_NetBillingsInExcessOfCostsAndEstimatedEarnings_C65879514F3A8D53A0F2E3640DA1DC15" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_4E32C60F224FCAAC5C36E3640D9E053B" xlink:to="loc_spxc_NetBillingsInExcessOfCostsAndEstimatedEarnings_C65879514F3A8D53A0F2E3640DA1DC15" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMatters" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMattersDetails" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMattersEnvironmentalMattersDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SiteContingencyLineItems" xlink:label="loc_us-gaap_SiteContingencyLineItems_5271E470BBAB5167B0FDE730AE43A502" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SiteContingencyTable" xlink:label="loc_us-gaap_SiteContingencyTable_770A67944EFA3607F92DE730AE422EF1" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SiteContingencyLineItems_5271E470BBAB5167B0FDE730AE43A502" xlink:to="loc_us-gaap_SiteContingencyTable_770A67944EFA3607F92DE730AE422EF1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EnvironmentalRemediationContingencyAxis" xlink:label="loc_us-gaap_EnvironmentalRemediationContingencyAxis_18817EC4729D827F82EFE730AE43FA7B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SiteContingencyTable_770A67944EFA3607F92DE730AE422EF1" xlink:to="loc_us-gaap_EnvironmentalRemediationContingencyAxis_18817EC4729D827F82EFE730AE43FA7B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EnvironmentalRemediationContingencyDomain" xlink:label="loc_us-gaap_EnvironmentalRemediationContingencyDomain_4FDA4705BC8DE871C2FEE730AE432373_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EnvironmentalRemediationContingencyAxis_18817EC4729D827F82EFE730AE43FA7B" xlink:to="loc_us-gaap_EnvironmentalRemediationContingencyDomain_4FDA4705BC8DE871C2FEE730AE432373_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EnvironmentalRemediationContingencyAxis_18817EC4729D827F82EFE730AE43FA7B" xlink:to="loc_us-gaap_EnvironmentalRemediationContingencyDomain_4FDA4705BC8DE871C2FEE730AE432373" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EnvironmentalIssueMember" xlink:label="loc_us-gaap_EnvironmentalIssueMember_09D30044E6B4EB09CE0EE730AE43F903" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EnvironmentalRemediationContingencyDomain_4FDA4705BC8DE871C2FEE730AE432373" xlink:to="loc_us-gaap_EnvironmentalIssueMember_09D30044E6B4EB09CE0EE730AE43F903" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SiteContingencyNumberOfSites" xlink:label="loc_spxc_SiteContingencyNumberOfSites_A9D25D9E44E745C22EA5E730AE4422B7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SiteContingencyLineItems_5271E470BBAB5167B0FDE730AE43A502" xlink:to="loc_spxc_SiteContingencyNumberOfSites_A9D25D9E44E745C22EA5E730AE4422B7" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SiteContingencyNumberOfSitesOnWhichEntityPotentiallyResponsible" xlink:label="loc_spxc_SiteContingencyNumberOfSitesOnWhichEntityPotentiallyResponsible_835E45A9EC31467C026FE730AE4405E3" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SiteContingencyLineItems_5271E470BBAB5167B0FDE730AE43A502" xlink:to="loc_spxc_SiteContingencyNumberOfSitesOnWhichEntityPotentiallyResponsible_835E45A9EC31467C026FE730AE4405E3" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SiteContingencyNumberOfActiveSites" xlink:label="loc_spxc_SiteContingencyNumberOfActiveSites_BF6D4106E2BC8FAF2075E730AE441B6B" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SiteContingencyLineItems_5271E470BBAB5167B0FDE730AE43A502" xlink:to="loc_spxc_SiteContingencyNumberOfActiveSites_BF6D4106E2BC8FAF2075E730AE441B6B" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMattersExecutiveAgreementsDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems" xlink:label="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D665D12F0B33ABA944F08A52ED6D1153" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable" xlink:label="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_89795EF6C6184767F19D8A52ED6D42F8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D665D12F0B33ABA944F08A52ED6D1153" xlink:to="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_89795EF6C6184767F19D8A52ED6D42F8" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TitleOfIndividualAxis" xlink:label="loc_us-gaap_TitleOfIndividualAxis_45526DC5274508F5E3C68A52ED6DB567" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_89795EF6C6184767F19D8A52ED6D42F8" xlink:to="loc_us-gaap_TitleOfIndividualAxis_45526DC5274508F5E3C68A52ED6DB567" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_59C2E607F58C1361B69B8A52ED6DD767_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TitleOfIndividualAxis_45526DC5274508F5E3C68A52ED6DB567" xlink:to="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_59C2E607F58C1361B69B8A52ED6DD767_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TitleOfIndividualAxis_45526DC5274508F5E3C68A52ED6DB567" xlink:to="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_59C2E607F58C1361B69B8A52ED6DD767" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ExecutiveOfficerMember" xlink:label="loc_us-gaap_ExecutiveOfficerMember_D291DEDB6A150BB971FA8A52ED6DAECD" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_59C2E607F58C1361B69B8A52ED6DD767" xlink:to="loc_us-gaap_ExecutiveOfficerMember_D291DEDB6A150BB971FA8A52ED6DAECD" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ExecutiveAgreementsAbstract" xlink:label="loc_spxc_ExecutiveAgreementsAbstract_419AEC47337F87D451FF8A52ED6D769C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D665D12F0B33ABA944F08A52ED6D1153" xlink:to="loc_spxc_ExecutiveAgreementsAbstract_419AEC47337F87D451FF8A52ED6D769C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_PeriodOfRollingTermOfEmploymentAgreements" xlink:label="loc_spxc_PeriodOfRollingTermOfEmploymentAgreements_6131E823C06FB3DC3E398A52ED6DFD24" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_ExecutiveAgreementsAbstract_419AEC47337F87D451FF8A52ED6D769C" xlink:to="loc_spxc_PeriodOfRollingTermOfEmploymentAgreements_6131E823C06FB3DC3E398A52ED6DFD24" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SupplementalUnemploymentBenefitsNumberofIndividualswithSeveranceBenefitAgreements" xlink:label="loc_spxc_SupplementalUnemploymentBenefitsNumberofIndividualswithSeveranceBenefitAgreements_6D0E8F72062EDD27767D8A52ED6D007A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_ExecutiveAgreementsAbstract_419AEC47337F87D451FF8A52ED6D769C" xlink:to="loc_spxc_SupplementalUnemploymentBenefitsNumberofIndividualswithSeveranceBenefitAgreements_6D0E8F72062EDD27767D8A52ED6D007A" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMattersGeneralDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:label="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingenciesTable" xlink:label="loc_us-gaap_LossContingenciesTable_9C56C6652E58C82CC619E730AE61A893" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:to="loc_us-gaap_LossContingenciesTable_9C56C6652E58C82CC619E730AE61A893" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_4F60FDADC99D34DD13CBE730AE61B28F" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_9C56C6652E58C82CC619E730AE61A893" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_4F60FDADC99D34DD13CBE730AE61B28F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_E88183E6D60040CF5C19E730AE61E0B4_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_4F60FDADC99D34DD13CBE730AE61B28F" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_E88183E6D60040CF5C19E730AE61E0B4_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_E88183E6D60040CF5C19E730AE61E0B4" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_4F60FDADC99D34DD13CBE730AE61B28F" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_E88183E6D60040CF5C19E730AE61E0B4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BuildingMember" xlink:label="loc_us-gaap_BuildingMember_575DF3307C64839852F2E730AE623434" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_E88183E6D60040CF5C19E730AE61E0B4" xlink:to="loc_us-gaap_BuildingMember_575DF3307C64839852F2E730AE623434" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_7E8237F3A25AA740E5D6E730AE62C52F" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_9C56C6652E58C82CC619E730AE61A893" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_7E8237F3A25AA740E5D6E730AE62C52F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_64B534C41D7EFA6B579FE730AE628C9C_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_7E8237F3A25AA740E5D6E730AE62C52F" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_64B534C41D7EFA6B579FE730AE628C9C_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_64B534C41D7EFA6B579FE730AE628C9C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_7E8237F3A25AA740E5D6E730AE62C52F" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_64B534C41D7EFA6B579FE730AE628C9C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SPXFlowIncMember" xlink:label="loc_spxc_SPXFlowIncMember_FD245A4BC1CE562D625DE730AE621852" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_64B534C41D7EFA6B579FE730AE628C9C" xlink:to="loc_spxc_SPXFlowIncMember_FD245A4BC1CE562D625DE730AE621852" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_33C8919FD971762BEA11E730AE6315D0" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_9C56C6652E58C82CC619E730AE61A893" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_33C8919FD971762BEA11E730AE6315D0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_8A94E5C304C7604E7E4EE730AE63207F_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_33C8919FD971762BEA11E730AE6315D0" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_8A94E5C304C7604E7E4EE730AE63207F_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_8A94E5C304C7604E7E4EE730AE63207F" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_33C8919FD971762BEA11E730AE6315D0" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_8A94E5C304C7604E7E4EE730AE63207F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember_D26569224C93CC02A3B6E730AE63B4C1" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_8A94E5C304C7604E7E4EE730AE63207F" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember_D26569224C93CC02A3B6E730AE63B4C1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CounterpartyNameAxis" xlink:label="loc_srt_CounterpartyNameAxis_A2F4EBCA245D5F1CFBF4E730AE63D093" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_9C56C6652E58C82CC619E730AE61A893" xlink:to="loc_srt_CounterpartyNameAxis_A2F4EBCA245D5F1CFBF4E730AE63D093" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_406D010DD23329664873E730AE642DD0_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_A2F4EBCA245D5F1CFBF4E730AE63D093" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_406D010DD23329664873E730AE642DD0_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_406D010DD23329664873E730AE642DD0" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_A2F4EBCA245D5F1CFBF4E730AE63D093" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_406D010DD23329664873E730AE642DD0" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SPXFlowIncMember" xlink:label="loc_spxc_SPXFlowIncMember_688592F150356962FC2FE730AE645FA0" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_406D010DD23329664873E730AE642DD0" xlink:to="loc_spxc_SPXFlowIncMember_688592F150356962FC2FE730AE645FA0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_32F1F9331F098C25E3BEE730AE641A06" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_9C56C6652E58C82CC619E730AE61A893" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_32F1F9331F098C25E3BEE730AE641A06" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_07ECD47471F278640DCAE730AE643F60_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_32F1F9331F098C25E3BEE730AE641A06" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_07ECD47471F278640DCAE730AE643F60_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_32F1F9331F098C25E3BEE730AE641A06" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_07ECD47471F278640DCAE730AE643F60" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_OtherLongTermLiabilitiesMember" xlink:label="loc_spxc_OtherLongTermLiabilitiesMember_2147016CFB94AC88A163E730AE6587FD" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_07ECD47471F278640DCAE730AE643F60" xlink:to="loc_spxc_OtherLongTermLiabilitiesMember_2147016CFB94AC88A163E730AE6587FD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsMember" xlink:label="loc_us-gaap_OtherAssetsMember_76DDC0A3405FBFA7F255E730AE65EA62" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_07ECD47471F278640DCAE730AE643F60" xlink:to="loc_us-gaap_OtherAssetsMember_76DDC0A3405FBFA7F255E730AE65EA62" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_AD907F100BF35D654C32E730AE65B46F" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_9C56C6652E58C82CC619E730AE61A893" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_AD907F100BF35D654C32E730AE65B46F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_93B51BB7BCBCA0A4C86FE730AE6553FA_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_AD907F100BF35D654C32E730AE65B46F" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_93B51BB7BCBCA0A4C86FE730AE6553FA_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_93B51BB7BCBCA0A4C86FE730AE6553FA" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_AD907F100BF35D654C32E730AE65B46F" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_93B51BB7BCBCA0A4C86FE730AE6553FA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherOperatingIncomeExpenseMember" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseMember_E370F4A0CB3617EC1A35E730AE668330" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_93B51BB7BCBCA0A4C86FE730AE6553FA" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseMember_E370F4A0CB3617EC1A35E730AE668330" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_GainLossonDispositionofDiscontinuedOperationsNetofTaxMember" xlink:label="loc_spxc_GainLossonDispositionofDiscontinuedOperationsNetofTaxMember_1E67596D300A2BC0D126E730AE66E450" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_93B51BB7BCBCA0A4C86FE730AE6553FA" xlink:to="loc_spxc_GainLossonDispositionofDiscontinuedOperationsNetofTaxMember_1E67596D300A2BC0D126E730AE66E450" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_75FC6997814C1246CDD3E730AE66A742" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_9C56C6652E58C82CC619E730AE61A893" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_75FC6997814C1246CDD3E730AE66A742" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:label="loc_us-gaap_LossContingencyNatureDomain_0F0ED469248CF6E151DFE730AE66610D_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_75FC6997814C1246CDD3E730AE66A742" xlink:to="loc_us-gaap_LossContingencyNatureDomain_0F0ED469248CF6E151DFE730AE66610D_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_75FC6997814C1246CDD3E730AE66A742" xlink:to="loc_us-gaap_LossContingencyNatureDomain_0F0ED469248CF6E151DFE730AE66610D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AsbestosIssueMember" xlink:label="loc_us-gaap_AsbestosIssueMember_E4491E280F80DB7EEC47E730AE66AD49" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_0F0ED469248CF6E151DFE730AE66610D" xlink:to="loc_us-gaap_AsbestosIssueMember_E4491E280F80DB7EEC47E730AE66AD49" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_24079CDDD0E3AAD4A85BE730AE6792E8" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_9C56C6652E58C82CC619E730AE61A893" xlink:to="loc_srt_RangeAxis_24079CDDD0E3AAD4A85BE730AE6792E8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_EDCA7936B5F040259C52E730AE67BA49_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_24079CDDD0E3AAD4A85BE730AE6792E8" xlink:to="loc_srt_RangeMember_EDCA7936B5F040259C52E730AE67BA49_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_EDCA7936B5F040259C52E730AE67BA49" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_24079CDDD0E3AAD4A85BE730AE6792E8" xlink:to="loc_srt_RangeMember_EDCA7936B5F040259C52E730AE67BA49" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_166BFF5076A74E7FF7E6E730AE6712B2" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_EDCA7936B5F040259C52E730AE67BA49" xlink:to="loc_srt_MinimumMember_166BFF5076A74E7FF7E6E730AE6712B2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseTermOfContract" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_CCCC450B1EA69DBBA63AE730AE68FAFB" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_CCCC450B1EA69DBBA63AE730AE68FAFB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_55C5E5164A111C2557D8E730AE6844F0" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_55C5E5164A111C2557D8E730AE6844F0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_9C44BA9CB645941D227BE730AE680FA9" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_9C44BA9CB645941D227BE730AE680FA9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_25FD85971DD8E2B20A59E730AE687C6B" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_25FD85971DD8E2B20A59E730AE687C6B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_EF76A241FD3C484BDF6AE730AE687586" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_EF76A241FD3C484BDF6AE730AE687586" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_CC64040355D92DDE8335E730AE688096" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_CC64040355D92DDE8335E730AE688096" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingencyAccrualAtCarryingValue" xlink:label="loc_us-gaap_LossContingencyAccrualAtCarryingValue_E28CCC849D130751C6F8E730AE699C93" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:to="loc_us-gaap_LossContingencyAccrualAtCarryingValue_E28CCC849D130751C6F8E730AE699C93" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross" xlink:label="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_29F191936BFE0DD15750E730AE69D933" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:to="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_29F191936BFE0DD15750E730AE69D933" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingencyAccrualCarryingValueNoncurrent" xlink:label="loc_us-gaap_LossContingencyAccrualCarryingValueNoncurrent_B1FAB4E40BA3ADFDDEE2E730AE691566" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:to="loc_us-gaap_LossContingencyAccrualCarryingValueNoncurrent_B1FAB4E40BA3ADFDDEE2E730AE691566" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingencyNumberOfDefendants" xlink:label="loc_us-gaap_LossContingencyNumberOfDefendants_FACE1871C540283989C2E730AE699836" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:to="loc_us-gaap_LossContingencyNumberOfDefendants_FACE1871C540283989C2E730AE699836" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_LiabilityForAsbestosAndEnvironmentalClaimsProceedsFromInsuranceRecoveries" xlink:label="loc_spxc_LiabilityForAsbestosAndEnvironmentalClaimsProceedsFromInsuranceRecoveries_610A3AD1E348110C9DB2E78693849528" xlink:type="locator"/>

<link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:to="loc_spxc_LiabilityForAsbestosAndEnvironmentalClaimsProceedsFromInsuranceRecoveries_610A3AD1E348110C9DB2E78693849528" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetPaymentForClaims" xlink:label="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetPaymentForClaims_B95B12A504F2E6E6EA73E730AE69AA3A" xlink:type="locator"/>

<link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:to="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetPaymentForClaims_B95B12A504F2E6E6EA73E730AE69AA3A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingencyReceivableNoncurrent" xlink:label="loc_us-gaap_LossContingencyReceivableNoncurrent_F850F77461902F784F30E730AE690052" xlink:type="locator"/>

<link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:to="loc_us-gaap_LossContingencyReceivableNoncurrent_F850F77461902F784F30E730AE690052" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossIncurredLoss1" xlink:label="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossIncurredLoss1_EDDCD6F3EC22A631C9DEE730AE6ADED6" xlink:type="locator"/>

<link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_E29B679A13EAF594770DE730AE67894E" xlink:to="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossIncurredLoss1_EDDCD6F3EC22A631C9DEE730AE6ADED6" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMattersLargePowerProjectsInSouthAfricaDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:label="loc_us-gaap_LossContingenciesLineItems_D40349DFC2DCF7757A5FF20F89DE065D" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingenciesTable" xlink:label="loc_us-gaap_LossContingenciesTable_2CE274CC98886591C553F20F89D97F60" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_D40349DFC2DCF7757A5FF20F89DE065D" xlink:to="loc_us-gaap_LossContingenciesTable_2CE274CC98886591C553F20F89D97F60" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_F6821230642EB9582A5FF21A2FF93B4E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_2CE274CC98886591C553F20F89D97F60" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_F6821230642EB9582A5FF21A2FF93B4E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_7BA3297850CDB398B975F21A2FFFFA2B_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_F6821230642EB9582A5FF21A2FF93B4E" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_7BA3297850CDB398B975F21A2FFFFA2B_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_F6821230642EB9582A5FF21A2FF93B4E" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_7BA3297850CDB398B975F21A2FFFFA2B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_ADCF180B55674C44C3A4F21A5F41A169" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_7BA3297850CDB398B975F21A2FFFFA2B" xlink:to="loc_us-gaap_SubsequentEventMember_ADCF180B55674C44C3A4F21A5F41A169" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_LitigationCaseAxis" xlink:label="loc_srt_LitigationCaseAxis_6D3D0B700B6672E11DCCF20F89DA49CF" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_2CE274CC98886591C553F20F89D97F60" xlink:to="loc_srt_LitigationCaseAxis_6D3D0B700B6672E11DCCF20F89DA49CF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_LitigationCaseTypeDomain" xlink:label="loc_srt_LitigationCaseTypeDomain_EE7CE7AC7322F8EBD2CDF20F89DACDBE_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_6D3D0B700B6672E11DCCF20F89DA49CF" xlink:to="loc_srt_LitigationCaseTypeDomain_EE7CE7AC7322F8EBD2CDF20F89DACDBE_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_6D3D0B700B6672E11DCCF20F89DA49CF" xlink:to="loc_srt_LitigationCaseTypeDomain_EE7CE7AC7322F8EBD2CDF20F89DACDBE" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DBTTechnologiesMember" xlink:label="loc_spxc_DBTTechnologiesMember_1D105F1811396474AA62F20F89DA12EC" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_EE7CE7AC7322F8EBD2CDF20F89DACDBE" xlink:to="loc_spxc_DBTTechnologiesMember_1D105F1811396474AA62F20F89DA12EC" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_111270C2390CC05AD0B2F20F89DBF0A1" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_2CE274CC98886591C553F20F89D97F60" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_111270C2390CC05AD0B2F20F89DBF0A1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_0705840198BA846822CAF20F89DB9DFD_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_111270C2390CC05AD0B2F20F89DBF0A1" xlink:to="loc_us-gaap_SegmentDomain_0705840198BA846822CAF20F89DB9DFD_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_0705840198BA846822CAF20F89DB9DFD" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_111270C2390CC05AD0B2F20F89DBF0A1" xlink:to="loc_us-gaap_SegmentDomain_0705840198BA846822CAF20F89DB9DFD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllOtherSegmentsMember" xlink:label="loc_us-gaap_AllOtherSegmentsMember_3DF66ACC6FCB23452269F20F89DBC22C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_0705840198BA846822CAF20F89DB9DFD" xlink:to="loc_us-gaap_AllOtherSegmentsMember_3DF66ACC6FCB23452269F20F89DBC22C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsAxis" xlink:label="loc_srt_ConsolidationItemsAxis_2E3F7D33DD8E861009B9F20F89DBBC6D" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_2CE274CC98886591C553F20F89D97F60" xlink:to="loc_srt_ConsolidationItemsAxis_2E3F7D33DD8E861009B9F20F89DBBC6D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_077CEB987A644823A397F20F89DC2D65_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_2E3F7D33DD8E861009B9F20F89DBBC6D" xlink:to="loc_srt_ConsolidationItemsDomain_077CEB987A644823A397F20F89DC2D65_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_2E3F7D33DD8E861009B9F20F89DBBC6D" xlink:to="loc_srt_ConsolidationItemsDomain_077CEB987A644823A397F20F89DC2D65" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_FE70886BF26539B73922F20F89DCA69D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_077CEB987A644823A397F20F89DC2D65" xlink:to="loc_us-gaap_OperatingSegmentsMember_FE70886BF26539B73922F20F89DCA69D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="loc_us-gaap_TypeOfArrangementAxis_5890D3CEDE88BE6FBA26F20F89DC9D75" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_2CE274CC98886591C553F20F89D97F60" xlink:to="loc_us-gaap_TypeOfArrangementAxis_5890D3CEDE88BE6FBA26F20F89DC9D75" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_7EFE91A4E11A2A44D286F20F89DC916D_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TypeOfArrangementAxis_5890D3CEDE88BE6FBA26F20F89DC9D75" xlink:to="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_7EFE91A4E11A2A44D286F20F89DC916D_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_7EFE91A4E11A2A44D286F20F89DC916D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TypeOfArrangementAxis_5890D3CEDE88BE6FBA26F20F89DC9D75" xlink:to="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_7EFE91A4E11A2A44D286F20F89DC916D" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_LargePowerProjectsMember" xlink:label="loc_spxc_LargePowerProjectsMember_A9BA3A2B1E460B42B40BF20F89DCFDFF" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_7EFE91A4E11A2A44D286F20F89DC916D" xlink:to="loc_spxc_LargePowerProjectsMember_A9BA3A2B1E460B42B40BF20F89DCFDFF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ChangeInAccountingEstimateByTypeAxis" xlink:label="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_05C89BB487CBBE327542F20F89DDF314" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_2CE274CC98886591C553F20F89D97F60" xlink:to="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_05C89BB487CBBE327542F20F89DDF314" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ChangeInAccountingEstimateTypeDomain" xlink:label="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_91CFFD9A893A47EEC7C3F20F89DD29F5_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_05C89BB487CBBE327542F20F89DDF314" xlink:to="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_91CFFD9A893A47EEC7C3F20F89DD29F5_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_05C89BB487CBBE327542F20F89DDF314" xlink:to="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_91CFFD9A893A47EEC7C3F20F89DD29F5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractsAccountedForUnderPercentageOfCompletionMember" xlink:label="loc_us-gaap_ContractsAccountedForUnderPercentageOfCompletionMember_206A9EA0BE55DBFC2CB0F20F89DDDDBF" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_91CFFD9A893A47EEC7C3F20F89DD29F5" xlink:to="loc_us-gaap_ContractsAccountedForUnderPercentageOfCompletionMember_206A9EA0BE55DBFC2CB0F20F89DDDDBF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_720119967DC12A450FFBF20F89DD11CB" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_2CE274CC98886591C553F20F89D97F60" xlink:to="loc_srt_StatementGeographicalAxis_720119967DC12A450FFBF20F89DD11CB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_6A73A805E0548B2FA1ACF20F89DDB8B0_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_720119967DC12A450FFBF20F89DD11CB" xlink:to="loc_srt_SegmentGeographicalDomain_6A73A805E0548B2FA1ACF20F89DDB8B0_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_6A73A805E0548B2FA1ACF20F89DDB8B0" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_720119967DC12A450FFBF20F89DD11CB" xlink:to="loc_srt_SegmentGeographicalDomain_6A73A805E0548B2FA1ACF20F89DDB8B0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_ZA" xlink:label="loc_country_ZA_1CA3C4B81C7472357363F20F89DEDE03" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6A73A805E0548B2FA1ACF20F89DDB8B0" xlink:to="loc_country_ZA_1CA3C4B81C7472357363F20F89DEDE03" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingencyEstimateOfPossibleLoss" xlink:label="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_B268790E6068E70BBCEBF21C164027A2" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_D40349DFC2DCF7757A5FF20F89DE065D" xlink:to="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_B268790E6068E70BBCEBF21C164027A2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnapprovedChangeOrdersAmount" xlink:label="loc_us-gaap_UnapprovedChangeOrdersAmount_28579EE2881C800E2B3DF20F89DEB5C4" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_D40349DFC2DCF7757A5FF20F89DE065D" xlink:to="loc_us-gaap_UnapprovedChangeOrdersAmount_28579EE2881C800E2B3DF20F89DEB5C4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LitigationSettlementAmountAwardedToOtherParty" xlink:label="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_AFAF0C8C754216675C94F20F89DE077F" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_D40349DFC2DCF7757A5FF20F89DE065D" xlink:to="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_AFAF0C8C754216675C94F20F89DE077F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_70805EFFC3119B266ACEF20F89DF4641" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_D40349DFC2DCF7757A5FF20F89DE065D" xlink:to="loc_us-gaap_OperatingIncomeLoss_70805EFFC3119B266ACEF20F89DF4641" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_12AECCF9B9447E23B162F20F89DF2BDB" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_D40349DFC2DCF7757A5FF20F89DE065D" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_12AECCF9B9447E23B162F20F89DF2BDB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_F49107914049FDAAA272F20F89DF9DF5" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_D40349DFC2DCF7757A5FF20F89DE065D" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_F49107914049FDAAA272F20F89DF9DF5" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMattersNoncontrollingInterestInSouthAfricanSubsidiaryDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:label="loc_us-gaap_LossContingenciesLineItems_CBE8D61744C7366433C24E552E1ABDBD" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingenciesTable" xlink:label="loc_us-gaap_LossContingenciesTable_93963BDCAB431B933CD04E552E17C5B4" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_CBE8D61744C7366433C24E552E1ABDBD" xlink:to="loc_us-gaap_LossContingenciesTable_93963BDCAB431B933CD04E552E17C5B4" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_OwnershipAxis" xlink:label="loc_srt_OwnershipAxis_FF6D33F4FE6A23AF88504ED275481065" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_93963BDCAB431B933CD04E552E17C5B4" xlink:to="loc_srt_OwnershipAxis_FF6D33F4FE6A23AF88504ED275481065" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_OwnershipDomain" xlink:label="loc_srt_OwnershipDomain_8F59A96D522BE78AD9274ED2754A5210_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_FF6D33F4FE6A23AF88504ED275481065" xlink:to="loc_srt_OwnershipDomain_8F59A96D522BE78AD9274ED2754A5210_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_OwnershipDomain" xlink:label="loc_srt_OwnershipDomain_8F59A96D522BE78AD9274ED2754A5210" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_FF6D33F4FE6A23AF88504ED275481065" xlink:to="loc_srt_OwnershipDomain_8F59A96D522BE78AD9274ED2754A5210" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DBTTechnologiesMember" xlink:label="loc_spxc_DBTTechnologiesMember_50F6F108A2FACDB59CC24ED2C7735ABE" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_8F59A96D522BE78AD9274ED2754A5210" xlink:to="loc_spxc_DBTTechnologiesMember_50F6F108A2FACDB59CC24ED2C7735ABE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="loc_srt_ConsolidatedEntitiesAxis_EF49AABC484680BA63274E552E17ABB2" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_93963BDCAB431B933CD04E552E17C5B4" xlink:to="loc_srt_ConsolidatedEntitiesAxis_EF49AABC484680BA63274E552E17ABB2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_0560248E23E57D75CEEC4E552E180E76_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_EF49AABC484680BA63274E552E17ABB2" xlink:to="loc_srt_ConsolidatedEntitiesDomain_0560248E23E57D75CEEC4E552E180E76_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_EF49AABC484680BA63274E552E17ABB2" xlink:to="loc_srt_ConsolidatedEntitiesDomain_0560248E23E57D75CEEC4E552E180E76" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SubsidiariesMember" xlink:label="loc_srt_SubsidiariesMember_1D68AC0FA28C8C2F20D64E552E183ED3" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_0560248E23E57D75CEEC4E552E180E76" xlink:to="loc_srt_SubsidiariesMember_1D68AC0FA28C8C2F20D64E552E183ED3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_454888C5655FAC2123CC4E552E187FF1" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_93963BDCAB431B933CD04E552E17C5B4" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_454888C5655FAC2123CC4E552E187FF1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_7D1A28906A8A6F7412B24E552E1812B5_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_454888C5655FAC2123CC4E552E187FF1" xlink:to="loc_us-gaap_RelatedPartyDomain_7D1A28906A8A6F7412B24E552E1812B5_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_454888C5655FAC2123CC4E552E187FF1" xlink:to="loc_us-gaap_RelatedPartyDomain_7D1A28906A8A6F7412B24E552E1812B5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BeneficialOwnerMember" xlink:label="loc_us-gaap_BeneficialOwnerMember_D1FC9B1FDA0C32F341904E552E194F12" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_7D1A28906A8A6F7412B24E552E1812B5" xlink:to="loc_us-gaap_BeneficialOwnerMember_D1FC9B1FDA0C32F341904E552E194F12" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OptionIndexedToIssuersEquityEquityAxis" xlink:label="loc_us-gaap_OptionIndexedToIssuersEquityEquityAxis_268150D9733D280617B94E552E1949A0" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_93963BDCAB431B933CD04E552E17C5B4" xlink:to="loc_us-gaap_OptionIndexedToIssuersEquityEquityAxis_268150D9733D280617B94E552E1949A0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OptionIndexedToIssuersEquityTypeDomain" xlink:label="loc_us-gaap_OptionIndexedToIssuersEquityTypeDomain_6B115AF86C5A4E6E9A054E552E1921E1_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OptionIndexedToIssuersEquityEquityAxis_268150D9733D280617B94E552E1949A0" xlink:to="loc_us-gaap_OptionIndexedToIssuersEquityTypeDomain_6B115AF86C5A4E6E9A054E552E1921E1_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OptionIndexedToIssuersEquityEquityAxis_268150D9733D280617B94E552E1949A0" xlink:to="loc_us-gaap_OptionIndexedToIssuersEquityTypeDomain_6B115AF86C5A4E6E9A054E552E1921E1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PutOptionMember" xlink:label="loc_us-gaap_PutOptionMember_4433872CA02C231C7F1D4E552E1A9897" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OptionIndexedToIssuersEquityTypeDomain_6B115AF86C5A4E6E9A054E552E1921E1" xlink:to="loc_us-gaap_PutOptionMember_4433872CA02C231C7F1D4E552E1A9897" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_E60FECAF570DCC86BE574E552E1A0F71" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_93963BDCAB431B933CD04E552E17C5B4" xlink:to="loc_srt_StatementGeographicalAxis_E60FECAF570DCC86BE574E552E1A0F71" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_1FB05F5BE38F6334DC664E552E1A317E_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_E60FECAF570DCC86BE574E552E1A0F71" xlink:to="loc_srt_SegmentGeographicalDomain_1FB05F5BE38F6334DC664E552E1A317E_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_1FB05F5BE38F6334DC664E552E1A317E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_E60FECAF570DCC86BE574E552E1A0F71" xlink:to="loc_srt_SegmentGeographicalDomain_1FB05F5BE38F6334DC664E552E1A317E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_ZA" xlink:label="loc_country_ZA_B0A712D9E34B58632E774E552E1AEC6E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1FB05F5BE38F6334DC664E552E1A317E" xlink:to="loc_country_ZA_B0A712D9E34B58632E774E552E1AEC6E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_6927AB56E01412850B2E4E552E1B743E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_CBE8D61744C7366433C24E552E1ABDBD" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_6927AB56E01412850B2E4E552E1B743E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityFairValue" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_ABA7ED900BA59198773C4E552E1B39AC" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_CBE8D61744C7366433C24E552E1ABDBD" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_ABA7ED900BA59198773C4E552E1B39AC" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NotesReceivableRelatedParties" xlink:label="loc_us-gaap_NotesReceivableRelatedParties_ECD9D2CBB7E5B0CEA4464E552E1BE96B" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_CBE8D61744C7366433C24E552E1ABDBD" xlink:to="loc_us-gaap_NotesReceivableRelatedParties_ECD9D2CBB7E5B0CEA4464E552E1BE96B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_1022E642949900DF852F4E552E1B83A6" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_CBE8D61744C7366433C24E552E1ABDBD" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_1022E642949900DF852F4E552E1B83A6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalIncreaseInCarryingAmountOfRedeemablePreferredStock" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalIncreaseInCarryingAmountOfRedeemablePreferredStock_636086997AD93910C2CA4E552E1CB526" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_CBE8D61744C7366433C24E552E1ABDBD" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalIncreaseInCarryingAmountOfRedeemablePreferredStock_636086997AD93910C2CA4E552E1CB526" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockDividendsAndOtherAdjustments" xlink:label="loc_us-gaap_PreferredStockDividendsAndOtherAdjustments_8EC6F43D3914E6A749414E552E1C2E80" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_CBE8D61744C7366433C24E552E1ABDBD" xlink:to="loc_us-gaap_PreferredStockDividendsAndOtherAdjustments_8EC6F43D3914E6A749414E552E1C2E80" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/CommitmentsContingentLiabilitiesAndOtherMattersTables" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/ConsolidatedBalanceSheets" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/ConsolidatedStatementsOfCashFlowsParenthetical" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/ConsolidatedStatementsOfEquity" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_A50C2AF6AF2869071F53DF25EB48A9F5" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_6D562839D25CDC059650DF25EB45B486" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_A50C2AF6AF2869071F53DF25EB48A9F5" xlink:to="loc_us-gaap_StatementTable_6D562839D25CDC059650DF25EB45B486" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_7530740BAA0F77BF351CDF25EB450172" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_6D562839D25CDC059650DF25EB45B486" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_7530740BAA0F77BF351CDF25EB450172" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_19927D92F1D38156B7C1DF25EB4559DB_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_7530740BAA0F77BF351CDF25EB450172" xlink:to="loc_us-gaap_TypeOfAdoptionMember_19927D92F1D38156B7C1DF25EB4559DB_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_7530740BAA0F77BF351CDF25EB450172" xlink:to="loc_us-gaap_TypeOfAdoptionMember_19927D92F1D38156B7C1DF25EB4559DB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201601Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201601Member_3FAA8079DDDC741AEA4FDF25EB461193" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_19927D92F1D38156B7C1DF25EB4559DB" xlink:to="loc_us-gaap_AccountingStandardsUpdate201601Member_3FAA8079DDDC741AEA4FDF25EB461193" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201409Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201409Member_4785ADF8CC1AF172CFF2DF25EB46EE4A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_19927D92F1D38156B7C1DF25EB4559DB" xlink:to="loc_us-gaap_AccountingStandardsUpdate201409Member_4785ADF8CC1AF172CFF2DF25EB46EE4A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201616Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201616Member_2D00E9A295B8A889A378DF25EB46CF67" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_19927D92F1D38156B7C1DF25EB4559DB" xlink:to="loc_us-gaap_AccountingStandardsUpdate201616Member_2D00E9A295B8A889A378DF25EB46CF67" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_08651E21994962BA3DFBDF25EB4644F7" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_6D562839D25CDC059650DF25EB45B486" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_08651E21994962BA3DFBDF25EB4644F7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_E00035AA7C11DDC378D8DF25EB47BCE8_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_08651E21994962BA3DFBDF25EB4644F7" xlink:to="loc_us-gaap_EquityComponentDomain_E00035AA7C11DDC378D8DF25EB47BCE8_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_E00035AA7C11DDC378D8DF25EB47BCE8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_08651E21994962BA3DFBDF25EB4644F7" xlink:to="loc_us-gaap_EquityComponentDomain_E00035AA7C11DDC378D8DF25EB47BCE8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_692092DFCE3039E7BF4ADF25EB474F12" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_E00035AA7C11DDC378D8DF25EB47BCE8" xlink:to="loc_us-gaap_CommonStockMember_692092DFCE3039E7BF4ADF25EB474F12" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_95CF0AD48B703B8B1F81DF25EB47EB93" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_E00035AA7C11DDC378D8DF25EB47BCE8" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_95CF0AD48B703B8B1F81DF25EB47EB93" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_4AA41E5E0CDEB77A48EADF25EB47D609" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_E00035AA7C11DDC378D8DF25EB47BCE8" xlink:to="loc_us-gaap_RetainedEarningsMember_4AA41E5E0CDEB77A48EADF25EB47D609" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_5A8196F6CA8F74FC1FA3DF25EB48C0FD" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_E00035AA7C11DDC378D8DF25EB47BCE8" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_5A8196F6CA8F74FC1FA3DF25EB48C0FD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="loc_us-gaap_TreasuryStockMember_6CBEBAAB6B786CAD8B93DF25EB489E76" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_E00035AA7C11DDC378D8DF25EB47BCE8" xlink:to="loc_us-gaap_TreasuryStockMember_6CBEBAAB6B786CAD8B93DF25EB489E76" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ParentMember" xlink:label="loc_us-gaap_ParentMember_E88B1658B2906DA97344DF25EB48A134" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_E00035AA7C11DDC378D8DF25EB47BCE8" xlink:to="loc_us-gaap_ParentMember_E88B1658B2906DA97344DF25EB48A134" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoncontrollingInterestMember" xlink:label="loc_us-gaap_NoncontrollingInterestMember_CEFC897B76836C13452FDF25EB48C85D" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_E00035AA7C11DDC378D8DF25EB47BCE8" xlink:to="loc_us-gaap_NoncontrollingInterestMember_CEFC897B76836C13452FDF25EB48C85D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_586D32BD301C5BA087A0DF25EB4913D7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_A50C2AF6AF2869071F53DF25EB48A9F5" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_586D32BD301C5BA087A0DF25EB4913D7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_FAA3B94A286020B4B119DF25EB49F549" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_586D32BD301C5BA087A0DF25EB4913D7" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_FAA3B94A286020B4B119DF25EB49F549" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_430B1C0B7CC037F964F8DF25EB498665" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_586D32BD301C5BA087A0DF25EB4913D7" xlink:to="loc_us-gaap_ProfitLoss_430B1C0B7CC037F964F8DF25EB498665" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_E8984DC0D024B5C9F792DF25EB4922C6" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_586D32BD301C5BA087A0DF25EB4913D7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_E8984DC0D024B5C9F792DF25EB4922C6" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_StockIssuedDuringPeriodValueShareBasedCompensationPlansNetOfTax" xlink:label="loc_spxc_StockIssuedDuringPeriodValueShareBasedCompensationPlansNetOfTax_BBF859C4BC34DCAC78A0DF25EB4ABC6A" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_586D32BD301C5BA087A0DF25EB4913D7" xlink:to="loc_spxc_StockIssuedDuringPeriodValueShareBasedCompensationPlansNetOfTax_BBF859C4BC34DCAC78A0DF25EB4ABC6A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_D039C083B2BC1713820BDF25EB4FF373" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_586D32BD301C5BA087A0DF25EB4913D7" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_D039C083B2BC1713820BDF25EB4FF373" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedStockValueSharesIssuedNetOfTaxWithholdings" xlink:label="loc_us-gaap_RestrictedStockValueSharesIssuedNetOfTaxWithholdings_F7009468BC69BB576609DF25EB4F9155" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_586D32BD301C5BA087A0DF25EB4913D7" xlink:to="loc_us-gaap_RestrictedStockValueSharesIssuedNetOfTaxWithholdings_F7009468BC69BB576609DF25EB4F9155" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockRetiredParValueMethodAmount" xlink:label="loc_us-gaap_TreasuryStockRetiredParValueMethodAmount_3DC429A2B10A0F358D28DF25EB4FEC1F" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_586D32BD301C5BA087A0DF25EB4913D7" xlink:to="loc_us-gaap_TreasuryStockRetiredParValueMethodAmount_3DC429A2B10A0F358D28DF25EB4FEC1F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MinorityInterestChangeInRedemptionValue" xlink:label="loc_us-gaap_MinorityInterestChangeInRedemptionValue_CBACAD8EA3426FB74504DF25EB505B80" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_586D32BD301C5BA087A0DF25EB4913D7" xlink:to="loc_us-gaap_MinorityInterestChangeInRedemptionValue_CBACAD8EA3426FB74504DF25EB505B80" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_OtherChangesInNoncontrollingInterests" xlink:label="loc_spxc_OtherChangesInNoncontrollingInterests_B9931357EE4E0E589E20DF25EB50A169" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_586D32BD301C5BA087A0DF25EB4913D7" xlink:to="loc_spxc_OtherChangesInNoncontrollingInterests_B9931357EE4E0E589E20DF25EB50A169" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_BF09B8F6FFA69D885ED3DF25EB50213A" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_586D32BD301C5BA087A0DF25EB4913D7" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_BF09B8F6FFA69D885ED3DF25EB50213A" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_TaxCutsAndJobsActOf2017ReclassificationFromAOCIToRetainedEarningsTaxEffect" xlink:label="loc_spxc_TaxCutsAndJobsActOf2017ReclassificationFromAOCIToRetainedEarningsTaxEffect_B316CEB07CF81D072D8DDF25EB508470" xlink:type="locator"/>

<link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_586D32BD301C5BA087A0DF25EB4913D7" xlink:to="loc_spxc_TaxCutsAndJobsActOf2017ReclassificationFromAOCIToRetainedEarningsTaxEffect_B316CEB07CF81D072D8DDF25EB508470" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/ConsolidatedStatementsOfEquityParenthetical" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/ConsolidatedStatementsOfOperations" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/DerivativeFinancialInstrumentsAndConcentrationsOfCreditRisk" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/DerivativeFinancialInstrumentsAndConcentrationsOfCreditRiskDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="loc_us-gaap_DerivativeLineItems_E2C69FDB9ADAA243D481E730AE814C9B" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeTable" xlink:label="loc_us-gaap_DerivativeTable_EF6BCB5D2BD3471A5D13E730AE7C5C33" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_E2C69FDB9ADAA243D481E730AE814C9B" xlink:to="loc_us-gaap_DerivativeTable_EF6BCB5D2BD3471A5D13E730AE7C5C33" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_2B1CB151C3B0D2D281F2E730AE7DB680" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_EF6BCB5D2BD3471A5D13E730AE7C5C33" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_2B1CB151C3B0D2D281F2E730AE7DB680" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_9FE61AC2E4A62171E0B4E730AE7D699F_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_2B1CB151C3B0D2D281F2E730AE7DB680" xlink:to="loc_us-gaap_EquityComponentDomain_9FE61AC2E4A62171E0B4E730AE7D699F_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_9FE61AC2E4A62171E0B4E730AE7D699F" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_2B1CB151C3B0D2D281F2E730AE7DB680" xlink:to="loc_us-gaap_EquityComponentDomain_9FE61AC2E4A62171E0B4E730AE7D699F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember" xlink:label="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_0B5B09AD91CDE49ACE86E730AE7DDF56" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_9FE61AC2E4A62171E0B4E730AE7D699F" xlink:to="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_0B5B09AD91CDE49ACE86E730AE7DDF56" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_60AB8D10AC92857A2AD8E730AE7E113C" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_EF6BCB5D2BD3471A5D13E730AE7C5C33" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_60AB8D10AC92857A2AD8E730AE7E113C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_8180D0DCB71E0893C74AE730AE7E60E7_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_60AB8D10AC92857A2AD8E730AE7E113C" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_8180D0DCB71E0893C74AE730AE7E60E7_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_8180D0DCB71E0893C74AE730AE7E60E7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_60AB8D10AC92857A2AD8E730AE7E113C" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_8180D0DCB71E0893C74AE730AE7E60E7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_96E70EDC60305256F808E730AE7E073F" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_8180D0DCB71E0893C74AE730AE7E60E7" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_96E70EDC60305256F808E730AE7E073F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_495EED090A367F851CE2E730AE7EAA30" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_EF6BCB5D2BD3471A5D13E730AE7C5C33" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_495EED090A367F851CE2E730AE7EAA30" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_FD66A6F7ED82C55ED3DBE730AE7FF7D6_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_495EED090A367F851CE2E730AE7EAA30" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_FD66A6F7ED82C55ED3DBE730AE7FF7D6_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_495EED090A367F851CE2E730AE7EAA30" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_FD66A6F7ED82C55ED3DBE730AE7FF7D6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestRateSwapMember" xlink:label="loc_us-gaap_InterestRateSwapMember_F58CFB6BD3BA6E56F3DBE730AE7FBC95" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_FD66A6F7ED82C55ED3DBE730AE7FF7D6" xlink:to="loc_us-gaap_InterestRateSwapMember_F58CFB6BD3BA6E56F3DBE730AE7FBC95" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_InterestRateSwapThroughDecember2021Member" xlink:label="loc_spxc_InterestRateSwapThroughDecember2021Member_1ED66F6F3851818D01E7E730AE7F28E8" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_FD66A6F7ED82C55ED3DBE730AE7FF7D6" xlink:to="loc_spxc_InterestRateSwapThroughDecember2021Member_1ED66F6F3851818D01E7E730AE7F28E8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_FEC0767D5A54FD6D9EB7E730AE7F5345" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_FD66A6F7ED82C55ED3DBE730AE7FF7D6" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_FEC0767D5A54FD6D9EB7E730AE7F5345" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmbeddedDerivativeFinancialInstrumentsMember" xlink:label="loc_us-gaap_EmbeddedDerivativeFinancialInstrumentsMember_AE53AA12015034EB0B29E730AE7F1952" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_FD66A6F7ED82C55ED3DBE730AE7FF7D6" xlink:to="loc_us-gaap_EmbeddedDerivativeFinancialInstrumentsMember_AE53AA12015034EB0B29E730AE7F1952" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ForwardContractsAndEmbeddedDerivativeFinancialInstrumentsMember" xlink:label="loc_spxc_ForwardContractsAndEmbeddedDerivativeFinancialInstrumentsMember_BF979D8A917F074F2A0EE730AE8035FE" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_FD66A6F7ED82C55ED3DBE730AE7FF7D6" xlink:to="loc_spxc_ForwardContractsAndEmbeddedDerivativeFinancialInstrumentsMember_BF979D8A917F074F2A0EE730AE8035FE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommodityContractMember" xlink:label="loc_us-gaap_CommodityContractMember_6BB89216E24CCF534CDFE730AE80BDBA" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_FD66A6F7ED82C55ED3DBE730AE7FF7D6" xlink:to="loc_us-gaap_CommodityContractMember_6BB89216E24CCF534CDFE730AE80BDBA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="loc_us-gaap_HedgingDesignationAxis_690DFB266D79B51D3C7FE730AE806285" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_EF6BCB5D2BD3471A5D13E730AE7C5C33" xlink:to="loc_us-gaap_HedgingDesignationAxis_690DFB266D79B51D3C7FE730AE806285" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_468DCE9E56AB749F9D8FE730AE80C2AB_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_690DFB266D79B51D3C7FE730AE806285" xlink:to="loc_us-gaap_HedgingDesignationDomain_468DCE9E56AB749F9D8FE730AE80C2AB_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_690DFB266D79B51D3C7FE730AE806285" xlink:to="loc_us-gaap_HedgingDesignationDomain_468DCE9E56AB749F9D8FE730AE80C2AB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_DAC34F609FB2397B66BFE730AE8090F4" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_468DCE9E56AB749F9D8FE730AE80C2AB" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_DAC34F609FB2397B66BFE730AE8090F4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="loc_us-gaap_NondesignatedMember_8AE9EA6CF64803DEE65EE730AE81B0FB" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_468DCE9E56AB749F9D8FE730AE80C2AB" xlink:to="loc_us-gaap_NondesignatedMember_8AE9EA6CF64803DEE65EE730AE81B0FB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SummaryOfDerivativeInstrumentsAbstract" xlink:label="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_BCD6FCDA060BDD13B876E730AE81EE7E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_E2C69FDB9ADAA243D481E730AE814C9B" xlink:to="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_BCD6FCDA060BDD13B876E730AE81EE7E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_FAF939B2F55121D3981AE730AE811504" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_BCD6FCDA060BDD13B876E730AE81EE7E" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_FAF939B2F55121D3981AE730AE811504" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_DerivativeNotionalAmount" xlink:label="loc_invest_DerivativeNotionalAmount_BD9D5873EA182EF28013E730AE814AAF" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_BCD6FCDA060BDD13B876E730AE81EE7E" xlink:to="loc_invest_DerivativeNotionalAmount_BD9D5873EA182EF28013E730AE814AAF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeFixedInterestRate" xlink:label="loc_us-gaap_DerivativeFixedInterestRate_A8F5F12507E6E93E6181E730AE82E1A7" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_BCD6FCDA060BDD13B876E730AE81EE7E" xlink:to="loc_us-gaap_DerivativeFixedInterestRate_A8F5F12507E6E93E6181E730AE82E1A7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax_A37498165D7A16E2C7E2E730AE82F584" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_BCD6FCDA060BDD13B876E730AE81EE7E" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax_A37498165D7A16E2C7E2E730AE82F584" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeAssetsNoncurrent" xlink:label="loc_us-gaap_DerivativeAssetsNoncurrent_98F63EB0E60DAF2F76E0E730AE8293B2" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_BCD6FCDA060BDD13B876E730AE81EE7E" xlink:to="loc_us-gaap_DerivativeAssetsNoncurrent_98F63EB0E60DAF2F76E0E730AE8293B2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnSaleOfDerivatives" xlink:label="loc_us-gaap_GainLossOnSaleOfDerivatives_C51662DE1C4990762FF7E730AE824341" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_BCD6FCDA060BDD13B876E730AE81EE7E" xlink:to="loc_us-gaap_GainLossOnSaleOfDerivatives_C51662DE1C4990762FF7E730AE824341" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountMass" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountMass_6744DD3A9263825BF527E730AE82F4D4" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_BCD6FCDA060BDD13B876E730AE81EE7E" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountMass_6744DD3A9263825BF527E730AE82F4D4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PriceRiskCashFlowHedgeLiabilityAtFairValue" xlink:label="loc_us-gaap_PriceRiskCashFlowHedgeLiabilityAtFairValue_C92F9A4CF1E745DBB330E730AE829462" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SummaryOfDerivativeInstrumentsAbstract_BCD6FCDA060BDD13B876E730AE81EE7E" xlink:to="loc_us-gaap_PriceRiskCashFlowHedgeLiabilityAtFairValue_C92F9A4CF1E745DBB330E730AE829462" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/DocumentAndEntityInformation" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/EmployeeBenefitPlans" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/EmployeeBenefitPlansDefinedBenefitPensionPlansDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_423DC04C9A21245E0177E23066F836D0" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_39CE896A6D1CB1E6FC5DE23066F2CBD5" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_423DC04C9A21245E0177E23066F836D0" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_39CE896A6D1CB1E6FC5DE23066F2CBD5" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationAxis" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationAxis_3E4E439AD71480E5AF1EE23066F3BF07" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_39CE896A6D1CB1E6FC5DE23066F2CBD5" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationAxis_3E4E439AD71480E5AF1EE23066F3BF07" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationDomain" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_E6CA0AE2D0BAEC9ED494E23066F40B08_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_3E4E439AD71480E5AF1EE23066F3BF07" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_E6CA0AE2D0BAEC9ED494E23066F40B08_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_3E4E439AD71480E5AF1EE23066F3BF07" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_E6CA0AE2D0BAEC9ED494E23066F40B08" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_country_US_8541F9A1E997D6D7913CE23066F494A1" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_E6CA0AE2D0BAEC9ED494E23066F40B08" xlink:to="loc_country_US_8541F9A1E997D6D7913CE23066F494A1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignPlanMember" xlink:label="loc_us-gaap_ForeignPlanMember_213AC3EFA622AF294B1FE23066F49E6F" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_E6CA0AE2D0BAEC9ED494E23066F40B08" xlink:to="loc_us-gaap_ForeignPlanMember_213AC3EFA622AF294B1FE23066F49E6F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_84965E0154360180C435E23066F4230E" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_39CE896A6D1CB1E6FC5DE23066F2CBD5" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_84965E0154360180C435E23066F4230E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_77A4117C48CAB467F96CE23066F47D86_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_84965E0154360180C435E23066F4230E" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_77A4117C48CAB467F96CE23066F47D86_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_84965E0154360180C435E23066F4230E" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_77A4117C48CAB467F96CE23066F47D86" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_E916EC8F66278003BD46E23066F5F095" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_77A4117C48CAB467F96CE23066F47D86" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_E916EC8F66278003BD46E23066F5F095" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_09AA1016F4B7A622EB4DE23066F5EAC7" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_77A4117C48CAB467F96CE23066F47D86" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_09AA1016F4B7A622EB4DE23066F5EAC7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_94A86BD9B54CF2A78659E23066F5BB3E" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_77A4117C48CAB467F96CE23066F47D86" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_94A86BD9B54CF2A78659E23066F5BB3E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_F3F39D2ED06C6813FB35E23066F5ED5A" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_39CE896A6D1CB1E6FC5DE23066F2CBD5" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_F3F39D2ED06C6813FB35E23066F5ED5A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_EED858E9DBDAF5721842E23066F56E5E_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_F3F39D2ED06C6813FB35E23066F5ED5A" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_EED858E9DBDAF5721842E23066F56E5E_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_F3F39D2ED06C6813FB35E23066F5ED5A" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_EED858E9DBDAF5721842E23066F56E5E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FixedIncomeFundsMember" xlink:label="loc_us-gaap_FixedIncomeFundsMember_784603EAC010AC6068E0E23066F62917" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_EED858E9DBDAF5721842E23066F56E5E" xlink:to="loc_us-gaap_FixedIncomeFundsMember_784603EAC010AC6068E0E23066F62917" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_CommingledGlobalFundAllocationsMember" xlink:label="loc_spxc_CommingledGlobalFundAllocationsMember_321D4FD3472D35318FA8E23066F65202" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_EED858E9DBDAF5721842E23066F56E5E" xlink:to="loc_spxc_CommingledGlobalFundAllocationsMember_321D4FD3472D35318FA8E23066F65202" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_7C2BF501463D384BFF24E23066F68216" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_EED858E9DBDAF5721842E23066F56E5E" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_7C2BF501463D384BFF24E23066F68216" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanEquitySecuritiesCommonStockMember" xlink:label="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesCommonStockMember_331CB5C8AAF0928FF406E23066F6B76E" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_EED858E9DBDAF5721842E23066F56E5E" xlink:to="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesCommonStockMember_331CB5C8AAF0928FF406E23066F6B76E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_USGovernmentDebtSecuritiesMember" xlink:label="loc_us-gaap_USGovernmentDebtSecuritiesMember_B1F3EE4444C33384EA1BE23066F7F43A" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_EED858E9DBDAF5721842E23066F56E5E" xlink:to="loc_us-gaap_USGovernmentDebtSecuritiesMember_B1F3EE4444C33384EA1BE23066F7F43A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="loc_us-gaap_ShortTermInvestmentsMember_1852077204EAA0C71027E23066F7E91D" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_EED858E9DBDAF5721842E23066F56E5E" xlink:to="loc_us-gaap_ShortTermInvestmentsMember_1852077204EAA0C71027E23066F7E91D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_8B9CB5EDFC69FFE01A3FE23066F757D0" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_EED858E9DBDAF5721842E23066F56E5E" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_8B9CB5EDFC69FFE01A3FE23066F757D0" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_GlobalEquitySecuritiesMember" xlink:label="loc_spxc_GlobalEquitySecuritiesMember_DB02C97DAE4F2D1B3279E23066F768F3" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_EED858E9DBDAF5721842E23066F56E5E" xlink:to="loc_spxc_GlobalEquitySecuritiesMember_DB02C97DAE4F2D1B3279E23066F768F3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherInvestmentsMember" xlink:label="loc_us-gaap_OtherInvestmentsMember_329DFD5F472A1DA417DEE23066F7136E" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_EED858E9DBDAF5721842E23066F56E5E" xlink:to="loc_us-gaap_OtherInvestmentsMember_329DFD5F472A1DA417DEE23066F7136E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CollateralizedSecuritiesMember" xlink:label="loc_us-gaap_CollateralizedSecuritiesMember_AB26CB965C987D329180E23066F7E553" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_EED858E9DBDAF5721842E23066F56E5E" xlink:to="loc_us-gaap_CollateralizedSecuritiesMember_AB26CB965C987D329180E23066F7E553" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_D45DBBE1C4C978ECF4BAE23066F89AC9" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_423DC04C9A21245E0177E23066F836D0" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_D45DBBE1C4C978ECF4BAE23066F89AC9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_88D088D7616232AD26DBE23066F8077F" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_423DC04C9A21245E0177E23066F836D0" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_88D088D7616232AD26DBE23066F8077F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_E8CFC2F46B97A8AFB1E0E23066F82191" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_423DC04C9A21245E0177E23066F836D0" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_E8CFC2F46B97A8AFB1E0E23066F82191" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DefinedBenefitPlanInvestmentsValuePerUnit" xlink:label="loc_spxc_DefinedBenefitPlanInvestmentsValuePerUnit_854D0939BAAA685C7942E23066F87996" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_423DC04C9A21245E0177E23066F836D0" xlink:to="loc_spxc_DefinedBenefitPlanInvestmentsValuePerUnit_854D0939BAAA685C7942E23066F87996" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/EmployeeBenefitPlansDefinedContributionRetirementPlansDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedContributionPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_72DA37381E9989780F3C8A52EEE51162" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedContributionPlanTable" xlink:label="loc_us-gaap_DefinedContributionPlanTable_1084C1BFC525C4CF21528A52EEE565F3" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_72DA37381E9989780F3C8A52EEE51162" xlink:to="loc_us-gaap_DefinedContributionPlanTable_1084C1BFC525C4CF21528A52EEE565F3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_1B40FF60AFF5411DEC0A8A52EEE52D88" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedContributionPlanTable_1084C1BFC525C4CF21528A52EEE565F3" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_1B40FF60AFF5411DEC0A8A52EEE52D88" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_ED2AC47532CE55D878318A52EEE5AA8B_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_1B40FF60AFF5411DEC0A8A52EEE52D88" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_ED2AC47532CE55D878318A52EEE5AA8B_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_1B40FF60AFF5411DEC0A8A52EEE52D88" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_ED2AC47532CE55D878318A52EEE5AA8B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_9AE40E9B8D5DB75551088A52EEE58124" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_ED2AC47532CE55D878318A52EEE5AA8B" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_9AE40E9B8D5DB75551088A52EEE58124" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_E6FCFD3E0247D1156D098A52EEE571A3" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_ED2AC47532CE55D878318A52EEE5AA8B" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_E6FCFD3E0247D1156D098A52EEE571A3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8249A08BB72ED90B28AC8A52EEE537F0" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedContributionPlanTable_1084C1BFC525C4CF21528A52EEE565F3" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8249A08BB72ED90B28AC8A52EEE537F0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E975A36F122DE16EC7828A52EEE50958_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8249A08BB72ED90B28AC8A52EEE537F0" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E975A36F122DE16EC7828A52EEE50958_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E975A36F122DE16EC7828A52EEE50958" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8249A08BB72ED90B28AC8A52EEE537F0" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E975A36F122DE16EC7828A52EEE50958" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_4BF81B4A0DD78A5E68A18A52EEE54030" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E975A36F122DE16EC7828A52EEE50958" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_4BF81B4A0DD78A5E68A18A52EEE54030" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent" xlink:label="loc_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_50F402D681620C7451248A52EEE5637C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_72DA37381E9989780F3C8A52EEE51162" xlink:to="loc_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_50F402D681620C7451248A52EEE5637C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DefinedContributionPlanNumberOfSharesContributed" xlink:label="loc_spxc_DefinedContributionPlanNumberOfSharesContributed_8CDCE1020F38B563AEA78A52EEE5710F" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_72DA37381E9989780F3C8A52EEE51162" xlink:to="loc_spxc_DefinedContributionPlanNumberOfSharesContributed_8CDCE1020F38B563AEA78A52EEE5710F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedContributionPlanCostRecognized" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_CB17B4EBBAC5C2F7996C8A52EEE52906" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_72DA37381E9989780F3C8A52EEE51162" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_CB17B4EBBAC5C2F7996C8A52EEE52906" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DefinedContributionPlanFairValueofPlanAssets" xlink:label="loc_spxc_DefinedContributionPlanFairValueofPlanAssets_42C296AACC5053FE95AE8A52EEE52F83" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_72DA37381E9989780F3C8A52EEE51162" xlink:to="loc_spxc_DefinedContributionPlanFairValueofPlanAssets_42C296AACC5053FE95AE8A52EEE52F83" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/EmployeeBenefitPlansEstimatedFutureBenefitPaymentsDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_24BD81D2174A00F7118F5D1D6729365D" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_910A948AEF8CBAA614855D1D67278CB8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_24BD81D2174A00F7118F5D1D6729365D" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_910A948AEF8CBAA614855D1D67278CB8" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationAxis" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationAxis_9B74299B0D4E288D52005D1D67277E95" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_910A948AEF8CBAA614855D1D67278CB8" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationAxis_9B74299B0D4E288D52005D1D67277E95" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationDomain" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_7499AB25DADBB6820FA55D1D6728822B_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_9B74299B0D4E288D52005D1D67277E95" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_7499AB25DADBB6820FA55D1D6728822B_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationDomain" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_7499AB25DADBB6820FA55D1D6728822B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_9B74299B0D4E288D52005D1D67277E95" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_7499AB25DADBB6820FA55D1D6728822B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_country_US_20DA41EB04FEFD10C99D5D1D67288030" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_7499AB25DADBB6820FA55D1D6728822B" xlink:to="loc_country_US_20DA41EB04FEFD10C99D5D1D67288030" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignPlanMember" xlink:label="loc_us-gaap_ForeignPlanMember_E21D6CBB17914FD9F2825D1D6728BFCA" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_7499AB25DADBB6820FA55D1D6728822B" xlink:to="loc_us-gaap_ForeignPlanMember_E21D6CBB17914FD9F2825D1D6728BFCA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_90BB38A5BCE3965D9A4D5D1D6729ACF7" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_910A948AEF8CBAA614855D1D67278CB8" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_90BB38A5BCE3965D9A4D5D1D6729ACF7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_D4A932AC3E43F004413A5D1D67299E0B_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_90BB38A5BCE3965D9A4D5D1D6729ACF7" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_D4A932AC3E43F004413A5D1D67299E0B_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_D4A932AC3E43F004413A5D1D67299E0B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_90BB38A5BCE3965D9A4D5D1D6729ACF7" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_D4A932AC3E43F004413A5D1D67299E0B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherPensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPensionPlansDefinedBenefitMember_AB1C3F8743442961CFFD5D1D6729BCA0" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_D4A932AC3E43F004413A5D1D67299E0B" xlink:to="loc_us-gaap_OtherPensionPlansDefinedBenefitMember_AB1C3F8743442961CFFD5D1D6729BCA0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_CD81F9C1944AE1AACDB85D1D67296E21" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_D4A932AC3E43F004413A5D1D67299E0B" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_CD81F9C1944AE1AACDB85D1D67296E21" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_28CE00CA52E47412622E5D1D672A18FB" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_24BD81D2174A00F7118F5D1D6729365D" xlink:to="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_28CE00CA52E47412622E5D1D672A18FB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_4E1BD02B3BC166607E035D1D672AC9B4" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_24BD81D2174A00F7118F5D1D6729365D" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_4E1BD02B3BC166607E035D1D672AC9B4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4D046838DDDCCD1932345D1D672A7D2C" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_24BD81D2174A00F7118F5D1D6729365D" xlink:to="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4D046838DDDCCD1932345D1D672A7D2C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_D906329DB8A86400C4145D1D672A436C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4D046838DDDCCD1932345D1D672A7D2C" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_D906329DB8A86400C4145D1D672A436C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_C0CAE1BBC7137F6100BB5D1D672B1002" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4D046838DDDCCD1932345D1D672A7D2C" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_C0CAE1BBC7137F6100BB5D1D672B1002" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_AE5476C5E5AE7118C0805D1D672B1294" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4D046838DDDCCD1932345D1D672A7D2C" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_AE5476C5E5AE7118C0805D1D672B1294" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_7E017F516576F41D48BB5D1D672F4487" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4D046838DDDCCD1932345D1D672A7D2C" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_7E017F516576F41D48BB5D1D672F4487" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_018DB68CCF99BD95FF2B5D1D672FA6FE" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4D046838DDDCCD1932345D1D672A7D2C" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_018DB68CCF99BD95FF2B5D1D672FA6FE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_E04EFF9B2C9BD49EFCD65D1D672FBF8C" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4D046838DDDCCD1932345D1D672A7D2C" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_E04EFF9B2C9BD49EFCD65D1D672FBF8C" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/EmployeeBenefitPlansNetPeriodicExpenseIncomeAndAdditionalInformationDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_281821A0A4905928D896E2306692B007" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D66C2D3C24B2EE7CED45E23066917CC6" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_281821A0A4905928D896E2306692B007" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D66C2D3C24B2EE7CED45E23066917CC6" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationAxis" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationAxis_77E0E670146F59C8681FE23066918AEC" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D66C2D3C24B2EE7CED45E23066917CC6" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationAxis_77E0E670146F59C8681FE23066918AEC" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationDomain" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_4C6D0E82E1ACA0879ACDE2306692D40E_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_77E0E670146F59C8681FE23066918AEC" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_4C6D0E82E1ACA0879ACDE2306692D40E_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationDomain" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_4C6D0E82E1ACA0879ACDE2306692D40E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_77E0E670146F59C8681FE23066918AEC" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_4C6D0E82E1ACA0879ACDE2306692D40E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_country_US_6C7BA63FB057706A87D7E23066926B0B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_4C6D0E82E1ACA0879ACDE2306692D40E" xlink:to="loc_country_US_6C7BA63FB057706A87D7E23066926B0B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignPlanMember" xlink:label="loc_us-gaap_ForeignPlanMember_8A3E9508528554DEFEDCE23066921323" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_4C6D0E82E1ACA0879ACDE2306692D40E" xlink:to="loc_us-gaap_ForeignPlanMember_8A3E9508528554DEFEDCE23066921323" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_3FF450BA43991B5DBD4CE23066922F5D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_281821A0A4905928D896E2306692B007" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_3FF450BA43991B5DBD4CE23066922F5D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation_B35BE4255EFD489E8F63E2306693B8C2" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_3FF450BA43991B5DBD4CE23066922F5D" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation_B35BE4255EFD489E8F63E2306693B8C2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation_DA1B39CF919D0AF9468DE2306693DE85" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_3FF450BA43991B5DBD4CE23066922F5D" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation_DA1B39CF919D0AF9468DE2306693DE85" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_1E72FD1A931CF6FA9149E2306693E1CD" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_3FF450BA43991B5DBD4CE23066922F5D" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_1E72FD1A931CF6FA9149E2306693E1CD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_BC0BF3B14B6D552E89C2E23066933926" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_3FF450BA43991B5DBD4CE23066922F5D" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_BC0BF3B14B6D552E89C2E23066933926" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_D5C6ED60D9022B4D548CE23066934103" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_281821A0A4905928D896E2306692B007" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_D5C6ED60D9022B4D548CE23066934103" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_16BB6436CD7E519E40A5E23066947C4B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_D5C6ED60D9022B4D548CE23066934103" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_16BB6436CD7E519E40A5E23066947C4B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_3F13CDCE7199D9A58F29E2306694AB9C" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_D5C6ED60D9022B4D548CE23066934103" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_3F13CDCE7199D9A58F29E2306694AB9C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_F017E7870C4FC06AB42EE230669434FF" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_D5C6ED60D9022B4D548CE23066934103" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_F017E7870C4FC06AB42EE230669434FF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_96F552AB8D41C15711F7E230669422F1" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_D5C6ED60D9022B4D548CE23066934103" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_96F552AB8D41C15711F7E230669422F1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax_6C27352D5AD8C5F00CC3E23066947A5A" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_D5C6ED60D9022B4D548CE23066934103" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax_6C27352D5AD8C5F00CC3E23066947A5A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_6B5353153106F9E18965E2306694EF2A" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_D5C6ED60D9022B4D548CE23066934103" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_6B5353153106F9E18965E2306694EF2A" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DefinedBenefitPlanNetPeriodicBenefitCostOfDiscontinuedOperations" xlink:label="loc_spxc_DefinedBenefitPlanNetPeriodicBenefitCostOfDiscontinuedOperations_96D6D7CBF4C648CFE771E2306695C014" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_D5C6ED60D9022B4D548CE23066934103" xlink:to="loc_spxc_DefinedBenefitPlanNetPeriodicBenefitCostOfDiscontinuedOperations_96D6D7CBF4C648CFE771E2306695C014" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_PensionAndOtherPostretirementBenefitExpenseOfContinuingOperations" xlink:label="loc_spxc_PensionAndOtherPostretirementBenefitExpenseOfContinuingOperations_0F842A4C337E9F80A9F1E2306695B7CD" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_D5C6ED60D9022B4D548CE23066934103" xlink:to="loc_spxc_PensionAndOtherPostretirementBenefitExpenseOfContinuingOperations_0F842A4C337E9F80A9F1E2306695B7CD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit_BAED7006881FD46D8773E230669524D9" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_D5C6ED60D9022B4D548CE23066934103" xlink:to="loc_us-gaap_DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit_BAED7006881FD46D8773E230669524D9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract_0EA1B2F4AE3BE4E0734CE2306695FBC8" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_281821A0A4905928D896E2306692B007" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract_0EA1B2F4AE3BE4E0734CE2306695FBC8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_2A0A11FAA972992BAF51E23066952334" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract_0EA1B2F4AE3BE4E0734CE2306695FBC8" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_2A0A11FAA972992BAF51E23066952334" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_96A295C0E32276528ED8E23066967C63" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_2A0A11FAA972992BAF51E23066952334" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_96A295C0E32276528ED8E23066967C63" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_70C4E28509704C6A12FAE23066962B71" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_2A0A11FAA972992BAF51E23066952334" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_70C4E28509704C6A12FAE23066962B71" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_297145B94C384A625219E2306696DA0B" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_2A0A11FAA972992BAF51E23066952334" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_297145B94C384A625219E2306696DA0B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_3D53122B59073B09B6D7E2306696C88F" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract_0EA1B2F4AE3BE4E0734CE2306695FBC8" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_3D53122B59073B09B6D7E2306696C88F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_C18AE97C67075FCC53CBE23066977A44" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_3D53122B59073B09B6D7E2306696C88F" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_C18AE97C67075FCC53CBE23066977A44" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_0DADFE22E24A713C4F05E2306697CA34" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_3D53122B59073B09B6D7E2306696C88F" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_0DADFE22E24A713C4F05E2306697CA34" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumedHealthCareCostTrendRatesAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumedHealthCareCostTrendRatesAbstract_C4EB5ECD47F498039556E23066974AA3" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_281821A0A4905928D896E2306692B007" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumedHealthCareCostTrendRatesAbstract_C4EB5ECD47F498039556E23066974AA3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear_441A6F5A2813D64BF51CE23066977F1D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumedHealthCareCostTrendRatesAbstract_C4EB5ECD47F498039556E23066974AA3" xlink:to="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear_441A6F5A2813D64BF51CE23066977F1D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1" xlink:label="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1_9747168AAE009796213CE2306697BB9F" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumedHealthCareCostTrendRatesAbstract_C4EB5ECD47F498039556E23066974AA3" xlink:to="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1_9747168AAE009796213CE2306697BB9F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate" xlink:label="loc_us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate_B2F541E671FF4CAC8F45E23066979D9D" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumedHealthCareCostTrendRatesAbstract_C4EB5ECD47F498039556E23066974AA3" xlink:to="loc_us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate_B2F541E671FF4CAC8F45E23066979D9D" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/EmployeeBenefitPlansObligationsAndFundedStatusDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_78594120C4223718FE29E29E4FD2C259" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_82FF35438456B686017EE29E4FD021B5" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_78594120C4223718FE29E29E4FD2C259" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_82FF35438456B686017EE29E4FD021B5" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationAxis" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationAxis_5B12AB112856781EE77DE29E4FD0766E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_82FF35438456B686017EE29E4FD021B5" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationAxis_5B12AB112856781EE77DE29E4FD0766E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationDomain" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_9123021E79F71EA187A4E29E4FD0CECF_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_5B12AB112856781EE77DE29E4FD0766E" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_9123021E79F71EA187A4E29E4FD0CECF_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationDomain" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_9123021E79F71EA187A4E29E4FD0CECF" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_5B12AB112856781EE77DE29E4FD0766E" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_9123021E79F71EA187A4E29E4FD0CECF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_country_US_0FC0D72033DE9B041FF0E29E4FD164D6" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_9123021E79F71EA187A4E29E4FD0CECF" xlink:to="loc_country_US_0FC0D72033DE9B041FF0E29E4FD164D6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignPlanMember" xlink:label="loc_us-gaap_ForeignPlanMember_2196A24861420C1C7023E29E4FD10A24" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_9123021E79F71EA187A4E29E4FD0CECF" xlink:to="loc_us-gaap_ForeignPlanMember_2196A24861420C1C7023E29E4FD10A24" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_362A1BA0077EDE87E85CE29E4FD1847C" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_82FF35438456B686017EE29E4FD021B5" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_362A1BA0077EDE87E85CE29E4FD1847C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_6C7B06079CE2AAF20CD0E29E4FD2D2AC_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_362A1BA0077EDE87E85CE29E4FD1847C" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_6C7B06079CE2AAF20CD0E29E4FD2D2AC_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_6C7B06079CE2AAF20CD0E29E4FD2D2AC" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_362A1BA0077EDE87E85CE29E4FD1847C" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_6C7B06079CE2AAF20CD0E29E4FD2D2AC" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_A673AA8CAB688431C5CDE29E4FD2632F" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_6C7B06079CE2AAF20CD0E29E4FD2D2AC" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_A673AA8CAB688431C5CDE29E4FD2632F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_AF82F1CA472C377221C0E29E4FD2C844" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_6C7B06079CE2AAF20CD0E29E4FD2D2AC" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_AF82F1CA472C377221C0E29E4FD2C844" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DefinedBenefitPlanUnfundedStatusOfPlan" xlink:label="loc_spxc_DefinedBenefitPlanUnfundedStatusOfPlan_89B4C2D6885D6FE510E0E29E4FD21767" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_78594120C4223718FE29E29E4FD2C259" xlink:to="loc_spxc_DefinedBenefitPlanUnfundedStatusOfPlan_89B4C2D6885D6FE510E0E29E4FD21767" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3B378FC7F0BE81FA0E3FE29E4FD322E7" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_78594120C4223718FE29E29E4FD2C259" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3B378FC7F0BE81FA0E3FE29E4FD322E7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_52B823D94CE714DBDAF9E29E4FD3F50F" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3B378FC7F0BE81FA0E3FE29E4FD322E7" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_52B823D94CE714DBDAF9E29E4FD3F50F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_9483651CADABB7102B03E29E4FD31CA6" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3B378FC7F0BE81FA0E3FE29E4FD322E7" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_9483651CADABB7102B03E29E4FD31CA6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_A4499B0CBAB11ABD51B8E29E4FD4252A" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3B378FC7F0BE81FA0E3FE29E4FD322E7" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_A4499B0CBAB11ABD51B8E29E4FD4252A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_AE6E7A89649245D65FA2E29E4FD499D7" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3B378FC7F0BE81FA0E3FE29E4FD322E7" xlink:to="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_AE6E7A89649245D65FA2E29E4FD499D7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanSettlementsBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanSettlementsBenefitObligation_26968C220D8417C3AB62E29E4FD4CEB5" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3B378FC7F0BE81FA0E3FE29E4FD322E7" xlink:to="loc_us-gaap_DefinedBenefitPlanSettlementsBenefitObligation_26968C220D8417C3AB62E29E4FD4CEB5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanCurtailments" xlink:label="loc_us-gaap_DefinedBenefitPlanCurtailments_B4B710887286B2CD7B75E29E4FD4D7FD" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3B378FC7F0BE81FA0E3FE29E4FD322E7" xlink:to="loc_us-gaap_DefinedBenefitPlanCurtailments_B4B710887286B2CD7B75E29E4FD4D7FD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAmendments" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAmendments_E84ECFCD9B44987C79DDE29E4FD4A005" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3B378FC7F0BE81FA0E3FE29E4FD322E7" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAmendments_E84ECFCD9B44987C79DDE29E4FD4A005" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanOtherChanges" xlink:label="loc_us-gaap_DefinedBenefitPlanOtherChanges_C70339F7CB47EDF9451FE29E4FD5AA78" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3B378FC7F0BE81FA0E3FE29E4FD322E7" xlink:to="loc_us-gaap_DefinedBenefitPlanOtherChanges_C70339F7CB47EDF9451FE29E4FD5AA78" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_EBA45928A7A1A07729F2E29E4FD50556" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3B378FC7F0BE81FA0E3FE29E4FD322E7" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_EBA45928A7A1A07729F2E29E4FD50556" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation_0EA25A09D25D7A71171EE29E4FD5E54A" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3B378FC7F0BE81FA0E3FE29E4FD322E7" xlink:to="loc_us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation_0EA25A09D25D7A71171EE29E4FD5E54A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_A5D0665C08A1E3F43F4EE29E4FD5D442" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_78594120C4223718FE29E29E4FD2C259" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_A5D0665C08A1E3F43F4EE29E4FD5D442" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_E313EAF8AADCBEDC2270E29E4FD5A529" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_A5D0665C08A1E3F43F4EE29E4FD5D442" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_E313EAF8AADCBEDC2270E29E4FD5A529" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_93E238ABC3DD0096A693E29E4FD6DF0C" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_A5D0665C08A1E3F43F4EE29E4FD5D442" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_93E238ABC3DD0096A693E29E4FD6DF0C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DefinedBenefitPlanContributionsByEmployerAndPlanParticipants" xlink:label="loc_spxc_DefinedBenefitPlanContributionsByEmployerAndPlanParticipants_14A422E72BEF8A69E553E29E4FD6FAA3" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_A5D0665C08A1E3F43F4EE29E4FD5D442" xlink:to="loc_spxc_DefinedBenefitPlanContributionsByEmployerAndPlanParticipants_14A422E72BEF8A69E553E29E4FD6FAA3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanSettlementsPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanSettlementsPlanAssets_6667162A4C915155815BE29E4FD64082" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_A5D0665C08A1E3F43F4EE29E4FD5D442" xlink:to="loc_us-gaap_DefinedBenefitPlanSettlementsPlanAssets_6667162A4C915155815BE29E4FD64082" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_7656CF5D265E091ED7A4E29E4FD65FD3" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_A5D0665C08A1E3F43F4EE29E4FD5D442" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_7656CF5D265E091ED7A4E29E4FD65FD3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss_954C79EAFE180532AA4BE29E4FD70F5B" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_A5D0665C08A1E3F43F4EE29E4FD5D442" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss_954C79EAFE180532AA4BE29E4FD70F5B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_21B072EBF82AF2ADAAD1E29E4FD7AFC3" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_78594120C4223718FE29E29E4FD2C259" xlink:to="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_21B072EBF82AF2ADAAD1E29E4FD7AFC3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_C8EED4C72CFB1B2FB3F9E29E4FD7A320" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_78594120C4223718FE29E29E4FD2C259" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_C8EED4C72CFB1B2FB3F9E29E4FD7A320" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_6D8CEC5008A35718D521E29E4FD787CC" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_C8EED4C72CFB1B2FB3F9E29E4FD7A320" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_6D8CEC5008A35718D521E29E4FD787CC" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_6A8B6F064804D6D9F54FE29E4FD80993" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_C8EED4C72CFB1B2FB3F9E29E4FD7A320" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_6A8B6F064804D6D9F54FE29E4FD80993" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_9A936DABE70E26B57B5CE29E4FD8B48A" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_C8EED4C72CFB1B2FB3F9E29E4FD7A320" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_9A936DABE70E26B57B5CE29E4FD8B48A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_21518808E8D94FA1134BE29E4FD88321" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_C8EED4C72CFB1B2FB3F9E29E4FD7A320" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_21518808E8D94FA1134BE29E4FD88321" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_15CF5AFA08676BA692AEE29E4FD8163B" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_78594120C4223718FE29E29E4FD2C259" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_15CF5AFA08676BA692AEE29E4FD8163B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_2D1B1037158AE6A65E3EE29E4FD87D3F" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_15CF5AFA08676BA692AEE29E4FD8163B" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_2D1B1037158AE6A65E3EE29E4FD87D3F" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/EmployeeBenefitPlansOverviewDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E09090238B90C89CA948CF427887BEED" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_FA7A5968DAE522A7E49BCF4278831424" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E09090238B90C89CA948CF427887BEED" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_FA7A5968DAE522A7E49BCF4278831424" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanNameAxis" xlink:label="loc_us-gaap_RetirementPlanNameAxis_582B3F6E9C825B84602CCF427883049E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_FA7A5968DAE522A7E49BCF4278831424" xlink:to="loc_us-gaap_RetirementPlanNameAxis_582B3F6E9C825B84602CCF427883049E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanNameDomain" xlink:label="loc_us-gaap_RetirementPlanNameDomain_F010B393BBCF10788F90CF427884719B_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanNameAxis_582B3F6E9C825B84602CCF427883049E" xlink:to="loc_us-gaap_RetirementPlanNameDomain_F010B393BBCF10788F90CF427884719B_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanNameAxis_582B3F6E9C825B84602CCF427883049E" xlink:to="loc_us-gaap_RetirementPlanNameDomain_F010B393BBCF10788F90CF427884719B" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_U.S.PostretirementPlanOPEBMember" xlink:label="loc_spxc_U.S.PostretirementPlanOPEBMember_A90EC137D7589A638D89CF427884AB0C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanNameDomain_F010B393BBCF10788F90CF427884719B" xlink:to="loc_spxc_U.S.PostretirementPlanOPEBMember_A90EC137D7589A638D89CF427884AB0C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationAxis" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationAxis_E9545C0B586CE3899A74CF427884138E" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_FA7A5968DAE522A7E49BCF4278831424" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationAxis_E9545C0B586CE3899A74CF427884138E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationDomain" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_59BB6CA2F8E1F9DD66A3CF427884F367_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_E9545C0B586CE3899A74CF427884138E" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_59BB6CA2F8E1F9DD66A3CF427884F367_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationDomain" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_59BB6CA2F8E1F9DD66A3CF427884F367" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_E9545C0B586CE3899A74CF427884138E" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_59BB6CA2F8E1F9DD66A3CF427884F367" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_country_US_A9C7DC4AE8E8AFE2D9C1CF4278854F19" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_59BB6CA2F8E1F9DD66A3CF427884F367" xlink:to="loc_country_US_A9C7DC4AE8E8AFE2D9C1CF4278854F19" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_F107AB0474B9B0086448CF4278856055" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_FA7A5968DAE522A7E49BCF4278831424" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_F107AB0474B9B0086448CF4278856055" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_EF29B1C478156448A9EECF42788513F7_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_F107AB0474B9B0086448CF4278856055" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_EF29B1C478156448A9EECF42788513F7_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_EF29B1C478156448A9EECF42788513F7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_F107AB0474B9B0086448CF4278856055" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_EF29B1C478156448A9EECF42788513F7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_D14EC3C0D573F7615B8BCF4278861730" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_EF29B1C478156448A9EECF42788513F7" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_D14EC3C0D573F7615B8BCF4278861730" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_EE58C686A2BD3DD89CB2CF427886790F" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_FA7A5968DAE522A7E49BCF4278831424" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_EE58C686A2BD3DD89CB2CF427886790F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_78B6FE86A45A85DA563FCF4278861CCC_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_EE58C686A2BD3DD89CB2CF427886790F" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_78B6FE86A45A85DA563FCF4278861CCC_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_78B6FE86A45A85DA563FCF4278861CCC" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_EE58C686A2BD3DD89CB2CF427886790F" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_78B6FE86A45A85DA563FCF4278861CCC" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SPXFlowIncMember" xlink:label="loc_spxc_SPXFlowIncMember_FD490621693D09959086CF4278869095" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_78B6FE86A45A85DA563FCF4278861CCC" xlink:to="loc_spxc_SPXFlowIncMember_FD490621693D09959086CF4278869095" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_A0E08F1FEEA652D40321CF4278870CC4" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_FA7A5968DAE522A7E49BCF4278831424" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_A0E08F1FEEA652D40321CF4278870CC4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_DB9610B81F2796296A15CF427887B44D_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_A0E08F1FEEA652D40321CF4278870CC4" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_DB9610B81F2796296A15CF427887B44D_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_DB9610B81F2796296A15CF427887B44D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_A0E08F1FEEA652D40321CF4278870CC4" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_DB9610B81F2796296A15CF427887B44D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember_C3A3ABB5D998BECBE98DCF42788764C4" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_DB9610B81F2796296A15CF427887B44D" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember_C3A3ABB5D998BECBE98DCF42788764C4" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DefinedBenefitPlanSettlementsPercentageofProjectedBenefitObligation" xlink:label="loc_spxc_DefinedBenefitPlanSettlementsPercentageofProjectedBenefitObligation_C749EA7F7243A28BF9AECF427888CC49" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E09090238B90C89CA948CF427887BEED" xlink:to="loc_spxc_DefinedBenefitPlanSettlementsPercentageofProjectedBenefitObligation_C749EA7F7243A28BF9AECF427888CC49" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanSettlementsBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanSettlementsBenefitObligation_B697E78349648A7BA6AFCF427888F13A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E09090238B90C89CA948CF427887BEED" xlink:to="loc_us-gaap_DefinedBenefitPlanSettlementsBenefitObligation_B697E78349648A7BA6AFCF427888F13A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_9019FE97600A01C0C553CF42788803C2" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E09090238B90C89CA948CF427887BEED" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_9019FE97600A01C0C553CF42788803C2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAmendments" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAmendments_BA58A8E64A372D5E9B57CF427888BBA9" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E09090238B90C89CA948CF427887BEED" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAmendments_BA58A8E64A372D5E9B57CF427888BBA9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligationIncreaseDecreaseForRemeasurementDueToSettlement" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationIncreaseDecreaseForRemeasurementDueToSettlement_8BA964BEFA665D3968D6CF427889F4DB" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E09090238B90C89CA948CF427887BEED" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligationIncreaseDecreaseForRemeasurementDueToSettlement_8BA964BEFA665D3968D6CF427889F4DB" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/EmployeeBenefitPlansPostretirementBenefitPlansDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_04F5E56FD08B2222A765DF5744721F29" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_82A33D1165A8CBC28282DF574470218C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_04F5E56FD08B2222A765DF5744721F29" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_82A33D1165A8CBC28282DF574470218C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_8008A135742B77E9BF35DF5744715273" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_82A33D1165A8CBC28282DF574470218C" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_8008A135742B77E9BF35DF5744715273" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_6F0C1D8ED58122062BD9DF5744715EA2_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_8008A135742B77E9BF35DF5744715273" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_6F0C1D8ED58122062BD9DF5744715EA2_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_6F0C1D8ED58122062BD9DF5744715EA2" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_8008A135742B77E9BF35DF5744715273" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_6F0C1D8ED58122062BD9DF5744715EA2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_ED892C28C50850E1000EDF5744718AAB" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_6F0C1D8ED58122062BD9DF5744715EA2" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_ED892C28C50850E1000EDF5744718AAB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_C1C391E6361785EDAB38DF5744724381" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_04F5E56FD08B2222A765DF5744721F29" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_C1C391E6361785EDAB38DF5744724381" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DefinedBenefitPlanUnfundedPlanDirectBenefitsPaid" xlink:label="loc_spxc_DefinedBenefitPlanUnfundedPlanDirectBenefitsPaid_E544D7C43F72240DF116DF574472F0DA" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_04F5E56FD08B2222A765DF5744721F29" xlink:to="loc_spxc_DefinedBenefitPlanUnfundedPlanDirectBenefitsPaid_E544D7C43F72240DF116DF574472F0DA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_B75C17A16A550B6A7917DF574472447D" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_04F5E56FD08B2222A765DF5744721F29" xlink:to="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_B75C17A16A550B6A7917DF574472447D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_141185E267A61A68E4A9DF5744724E0C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_B75C17A16A550B6A7917DF574472447D" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_141185E267A61A68E4A9DF5744724E0C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_024684C33152ED43CADBDF574473D5FA" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_B75C17A16A550B6A7917DF574472447D" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_024684C33152ED43CADBDF574473D5FA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_8FDD3FB03D7FE785AA09DF574473E36E" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_B75C17A16A550B6A7917DF574472447D" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_8FDD3FB03D7FE785AA09DF574473E36E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_B8FFBB5502AE1FFF4EF2DF5744736D65" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_B75C17A16A550B6A7917DF574472447D" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_B8FFBB5502AE1FFF4EF2DF5744736D65" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_CF0367DF504084E0A8ECDF574473E555" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_B75C17A16A550B6A7917DF574472447D" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_CF0367DF504084E0A8ECDF574473E555" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_6948946F4354ED798A6BDF5744737E2B" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_B75C17A16A550B6A7917DF574472447D" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_6948946F4354ED798A6BDF5744737E2B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_65E00E2183F6224044D0DF574474E699" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_B75C17A16A550B6A7917DF574472447D" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_65E00E2183F6224044D0DF574474E699" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_B5F34AD541EDCD6C1330DF574474B7F7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_65E00E2183F6224044D0DF574474E699" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_B5F34AD541EDCD6C1330DF574474B7F7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_51582D45ADE27104191BDF574474B98A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_65E00E2183F6224044D0DF574474E699" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_51582D45ADE27104191BDF574474B98A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_B2B200F2269F447B9440DF57447450BE" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_65E00E2183F6224044D0DF574474E699" xlink:to="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_B2B200F2269F447B9440DF57447450BE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_135FFBB846DFDC4DD723DF57447495BF" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_65E00E2183F6224044D0DF574474E699" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_135FFBB846DFDC4DD723DF57447495BF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAmendments" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAmendments_F1827DC2B4A77405EC13DF574475EBD6" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_65E00E2183F6224044D0DF574474E699" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAmendments_F1827DC2B4A77405EC13DF574475EBD6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_EFEA446B34F31E6459BADF57447506F6" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_B75C17A16A550B6A7917DF574472447D" xlink:to="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_EFEA446B34F31E6459BADF57447506F6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_B509089E02B10C9F2F61DF574475608D" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_04F5E56FD08B2222A765DF5744721F29" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_B509089E02B10C9F2F61DF574475608D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_3881F8EF5FEAE5AE73F5DF5744756F08" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_04F5E56FD08B2222A765DF5744721F29" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_3881F8EF5FEAE5AE73F5DF5744756F08" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_A3C9DF61E2D6FBC62EA1DF57447648BD" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_04F5E56FD08B2222A765DF5744721F29" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_A3C9DF61E2D6FBC62EA1DF57447648BD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_BF0F132ADB2FFE81C27BDF5744768274" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_04F5E56FD08B2222A765DF5744721F29" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_BF0F132ADB2FFE81C27BDF5744768274" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_AA44E04CBA8C25A03DC1DF5744765712" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_04F5E56FD08B2222A765DF5744721F29" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_AA44E04CBA8C25A03DC1DF5744765712" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_66125D65CDA838BD4B44DF57447626C1" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_AA44E04CBA8C25A03DC1DF5744765712" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_66125D65CDA838BD4B44DF57447626C1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_A28FCD610726AC57B78EDF5744777E5F" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_AA44E04CBA8C25A03DC1DF5744765712" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_A28FCD610726AC57B78EDF5744777E5F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_F6070FDC3D0E2F5C4C72DF5744772986" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_AA44E04CBA8C25A03DC1DF5744765712" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_F6070FDC3D0E2F5C4C72DF5744772986" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax_F07980B01CB97C84FA81DF574477AF26" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_AA44E04CBA8C25A03DC1DF5744765712" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax_F07980B01CB97C84FA81DF574477AF26" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_37C983B71911F3609E1DDF57447712B0" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_AA44E04CBA8C25A03DC1DF5744765712" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_37C983B71911F3609E1DDF57447712B0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract_8F0497C780D44FD96768DF574477AD7D" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_04F5E56FD08B2222A765DF5744721F29" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract_8F0497C780D44FD96768DF574477AD7D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear_D5801A896F948D664079DF57447763FB" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract_8F0497C780D44FD96768DF574477AD7D" xlink:to="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear_D5801A896F948D664079DF57447763FB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1" xlink:label="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1_5D4FED5CFBD3D3125AC2DF57447873AF" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract_8F0497C780D44FD96768DF574477AD7D" xlink:to="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1_5D4FED5CFBD3D3125AC2DF57447873AF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate" xlink:label="loc_us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate_780E634887F75A1BC9E5DF574478C5A4" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract_8F0497C780D44FD96768DF574477AD7D" xlink:to="loc_us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate_780E634887F75A1BC9E5DF574478C5A4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_D69F961470C1C64408ABDF5744784F8D" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract_8F0497C780D44FD96768DF574477AD7D" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_D69F961470C1C64408ABDF5744784F8D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_A3683F424E055BABD660DF5744780BAA" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract_8F0497C780D44FD96768DF574477AD7D" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_A3683F424E055BABD660DF5744780BAA" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/EmployeeBenefitPlansSummaryOfChangesInFairValueOfLevel3Details" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_75A83DBEC97DAF9D63EAE23066EB354B" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_00A8B5F018B7808E37EBE23066E91ADE" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_75A83DBEC97DAF9D63EAE23066EB354B" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_00A8B5F018B7808E37EBE23066E91ADE" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2565CF955DED7E68132BE23066E9E347" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_00A8B5F018B7808E37EBE23066E91ADE" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2565CF955DED7E68132BE23066E9E347" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_D85E40F3F07DB58AA5A8E23066E9B08C_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2565CF955DED7E68132BE23066E9E347" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_D85E40F3F07DB58AA5A8E23066E9B08C_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_D85E40F3F07DB58AA5A8E23066E9B08C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2565CF955DED7E68132BE23066E9E347" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_D85E40F3F07DB58AA5A8E23066E9B08C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_BBDB6A2176FB11586B6FE23066E9F6EA" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_D85E40F3F07DB58AA5A8E23066E9B08C" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_BBDB6A2176FB11586B6FE23066E9F6EA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_6A41CEB49A0E81CC35B6E23066EA1901" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_00A8B5F018B7808E37EBE23066E91ADE" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_6A41CEB49A0E81CC35B6E23066EA1901" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_5DF8773B45128E94AAD8E23066EA4E5A_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_6A41CEB49A0E81CC35B6E23066EA1901" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_5DF8773B45128E94AAD8E23066EA4E5A_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_5DF8773B45128E94AAD8E23066EA4E5A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_6A41CEB49A0E81CC35B6E23066EA1901" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_5DF8773B45128E94AAD8E23066EA4E5A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanEquitySecuritiesCommonStockMember" xlink:label="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesCommonStockMember_4288C87309CECB9E47A8E23066EAA655" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5DF8773B45128E94AAD8E23066EA4E5A" xlink:to="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesCommonStockMember_4288C87309CECB9E47A8E23066EAA655" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_CommingledGlobalFundAllocationsMember" xlink:label="loc_spxc_CommingledGlobalFundAllocationsMember_CD18A8231B32BE50A29DE23066EA00F5" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5DF8773B45128E94AAD8E23066EA4E5A" xlink:to="loc_spxc_CommingledGlobalFundAllocationsMember_CD18A8231B32BE50A29DE23066EA00F5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FixedIncomeFundsMember" xlink:label="loc_us-gaap_FixedIncomeFundsMember_6004C8EAF92F9227A2DEE23066EB2D78" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5DF8773B45128E94AAD8E23066EA4E5A" xlink:to="loc_us-gaap_FixedIncomeFundsMember_6004C8EAF92F9227A2DEE23066EB2D78" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherInvestmentsMember" xlink:label="loc_us-gaap_OtherInvestmentsMember_935055BC3E0F55FC41B9E23066EBCED2" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5DF8773B45128E94AAD8E23066EA4E5A" xlink:to="loc_us-gaap_OtherInvestmentsMember_935055BC3E0F55FC41B9E23066EBCED2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_C5659084E7274508EB3BE23066EBDBF9" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_75A83DBEC97DAF9D63EAE23066EB354B" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_C5659084E7274508EB3BE23066EBDBF9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_5FE78EFFDD33A32344EBE23066EBF3D9" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_C5659084E7274508EB3BE23066EBDBF9" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_5FE78EFFDD33A32344EBE23066EBF3D9" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/EmployeeBenefitPlansTables" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_B8C05AABD64577033EE4E230670AEA61" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_7EB04CA09713403030F8E2306709111A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_B8C05AABD64577033EE4E230670AEA61" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_7EB04CA09713403030F8E2306709111A" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_2DBAF9B77D8F3DCFD859E2306709E887" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_7EB04CA09713403030F8E2306709111A" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_2DBAF9B77D8F3DCFD859E2306709E887" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_2912F5CD14800B1671A6E2306709799A_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_2DBAF9B77D8F3DCFD859E2306709E887" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_2912F5CD14800B1671A6E2306709799A_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_2912F5CD14800B1671A6E2306709799A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_2DBAF9B77D8F3DCFD859E2306709E887" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_2912F5CD14800B1671A6E2306709799A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_3C11985BAB6730A7EBDEE230670A5A8A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_2912F5CD14800B1671A6E2306709799A" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_3C11985BAB6730A7EBDEE230670A5A8A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_9747FF57B7B5C1430A4AE230670AD950" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_2912F5CD14800B1671A6E2306709799A" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_9747FF57B7B5C1430A4AE230670AD950" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock_6B39BD13580E26C5EBC9E230670A98A2" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_B8C05AABD64577033EE4E230670AEA61" xlink:to="loc_us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock_6B39BD13580E26C5EBC9E230670A98A2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_635061682E04FA40EF64E230670BD426" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_B8C05AABD64577033EE4E230670AEA61" xlink:to="loc_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_635061682E04FA40EF64E230670BD426" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ScheduleOfFundedStatusAndAmountsRecognizedInBalanceSheetAndAccumulatedOtherComprehensiveIncomeLossTableTextBlock" xlink:label="loc_spxc_ScheduleOfFundedStatusAndAmountsRecognizedInBalanceSheetAndAccumulatedOtherComprehensiveIncomeLossTableTextBlock_962660DD3F5CB5C82D6FE230670BE8FE" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_B8C05AABD64577033EE4E230670AEA61" xlink:to="loc_spxc_ScheduleOfFundedStatusAndAmountsRecognizedInBalanceSheetAndAccumulatedOtherComprehensiveIncomeLossTableTextBlock_962660DD3F5CB5C82D6FE230670BE8FE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock_EF99C0FFA7AB77130093E230670BA0DD" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_B8C05AABD64577033EE4E230670AEA61" xlink:to="loc_us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock_EF99C0FFA7AB77130093E230670BA0DD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfNetBenefitCostsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_6B5457FB9E740A6CD8F0E230670B4AEC" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_B8C05AABD64577033EE4E230670AEA61" xlink:to="loc_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_6B5457FB9E740A6CD8F0E230670B4AEC" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfAssumptionsUsedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_AAAA2BA4EEFDB716C266E230670B6739" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_B8C05AABD64577033EE4E230670AEA61" xlink:to="loc_us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_AAAA2BA4EEFDB716C266E230670B6739" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ScheduleOfExpectedBenefitPaymentsAndFederalSubsidiesTableTextBlock" xlink:label="loc_spxc_ScheduleOfExpectedBenefitPaymentsAndFederalSubsidiesTableTextBlock_FB3F3CF87A61CD8935E3E230670C6E00" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_B8C05AABD64577033EE4E230670AEA61" xlink:to="loc_spxc_ScheduleOfExpectedBenefitPaymentsAndFederalSubsidiesTableTextBlock_FB3F3CF87A61CD8935E3E230670C6E00" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfHealthCareCostTrendRatesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfHealthCareCostTrendRatesTableTextBlock_F849A83DDEBCFEC1DEF0E230670CF1B9" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_B8C05AABD64577033EE4E230670AEA61" xlink:to="loc_us-gaap_ScheduleOfHealthCareCostTrendRatesTableTextBlock_F849A83DDEBCFEC1DEF0E230670CF1B9" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/FairValue" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/FairValueDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_71364912780508E391FEDF25E65652C8" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30569E222E679732C53ADF25E64ECCF5" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_71364912780508E391FEDF25E65652C8" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30569E222E679732C53ADF25E64ECCF5" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_3EC899769D72DD15BA75DF25E64E7D3B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30569E222E679732C53ADF25E64ECCF5" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_3EC899769D72DD15BA75DF25E64E7D3B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_2F55209263D54B477CDADF25E64E1762_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_3EC899769D72DD15BA75DF25E64E7D3B" xlink:to="loc_us-gaap_TypeOfAdoptionMember_2F55209263D54B477CDADF25E64E1762_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_2F55209263D54B477CDADF25E64E1762" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_3EC899769D72DD15BA75DF25E64E7D3B" xlink:to="loc_us-gaap_TypeOfAdoptionMember_2F55209263D54B477CDADF25E64E1762" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201601Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201601Member_1A61613EF4527A3336FDDF25E64E1CED" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_2F55209263D54B477CDADF25E64E1762" xlink:to="loc_us-gaap_AccountingStandardsUpdate201601Member_1A61613EF4527A3336FDDF25E64E1CED" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_22646D905417B2818E84DF25E64F24E9" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30569E222E679732C53ADF25E64ECCF5" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_22646D905417B2818E84DF25E64F24E9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_0DB91F5D4919D63B18E1DF25E64F1FA8_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_22646D905417B2818E84DF25E64F24E9" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_0DB91F5D4919D63B18E1DF25E64F1FA8_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_0DB91F5D4919D63B18E1DF25E64F1FA8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_22646D905417B2818E84DF25E64F24E9" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_0DB91F5D4919D63B18E1DF25E64F1FA8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfBySaleMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_2417CA31B9BA626A0EFBDF25E64F276B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_0DB91F5D4919D63B18E1DF25E64F1FA8" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_2417CA31B9BA626A0EFBDF25E64F276B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CounterpartyNameAxis" xlink:label="loc_srt_CounterpartyNameAxis_16559E31A90E59BA59D3DF25E650C908" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30569E222E679732C53ADF25E64ECCF5" xlink:to="loc_srt_CounterpartyNameAxis_16559E31A90E59BA59D3DF25E650C908" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_05DE7BDD638D3EEED0CADF25E6502FD8_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_16559E31A90E59BA59D3DF25E650C908" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_05DE7BDD638D3EEED0CADF25E6502FD8_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_05DE7BDD638D3EEED0CADF25E6502FD8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_16559E31A90E59BA59D3DF25E650C908" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_05DE7BDD638D3EEED0CADF25E6502FD8" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SPXCMember" xlink:label="loc_spxc_SPXCMember_A5ED02F68AD31D6441BADF25E6500CFE" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_05DE7BDD638D3EEED0CADF25E6502FD8" xlink:to="loc_spxc_SPXCMember_A5ED02F68AD31D6441BADF25E6500CFE" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SubsidiaryofmutaresAGtheBuyerMember" xlink:label="loc_spxc_SubsidiaryofmutaresAGtheBuyerMember_8B36D736E2EAF6608521DF25E650FA8B" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_05DE7BDD638D3EEED0CADF25E6502FD8" xlink:to="loc_spxc_SubsidiaryofmutaresAGtheBuyerMember_8B36D736E2EAF6608521DF25E650FA8B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsByNatureAxis" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis_E913C1064F92568B5078DF25E651CA14" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30569E222E679732C53ADF25E64ECCF5" xlink:to="loc_us-gaap_GuaranteeObligationsByNatureAxis_E913C1064F92568B5078DF25E651CA14" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_96DCEC068E26D4239882DF25E651989B_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_E913C1064F92568B5078DF25E651CA14" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_96DCEC068E26D4239882DF25E651989B_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_96DCEC068E26D4239882DF25E651989B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_E913C1064F92568B5078DF25E651CA14" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_96DCEC068E26D4239882DF25E651989B" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BankandSuretyBondsMember" xlink:label="loc_spxc_BankandSuretyBondsMember_66AEFC5EF4FA212443EFDF25E6521762" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_96DCEC068E26D4239882DF25E651989B" xlink:to="loc_spxc_BankandSuretyBondsMember_66AEFC5EF4FA212443EFDF25E6521762" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndemnificationGuaranteeMember" xlink:label="loc_us-gaap_IndemnificationGuaranteeMember_B26A1BD5FBA74AF75B97DF25E6525527" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_96DCEC068E26D4239882DF25E651989B" xlink:to="loc_us-gaap_IndemnificationGuaranteeMember_B26A1BD5FBA74AF75B97DF25E6525527" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_GuaranteesandBondsMember" xlink:label="loc_spxc_GuaranteesandBondsMember_717B82C17CEE1EAD7187DF25E6527D34" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_96DCEC068E26D4239882DF25E651989B" xlink:to="loc_spxc_GuaranteesandBondsMember_717B82C17CEE1EAD7187DF25E6527D34" xlink:type="arc"/>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1C591E9F8416F8433E70DF25E652DBBE" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30569E222E679732C53ADF25E64ECCF5" xlink:to="loc_dei_LegalEntityAxis_1C591E9F8416F8433E70DF25E652DBBE" xlink:type="arc"/>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_5FC96E888242ECCF04F9DF25E6526753_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1C591E9F8416F8433E70DF25E652DBBE" xlink:to="loc_dei_EntityDomain_5FC96E888242ECCF04F9DF25E6526753_default" xlink:type="arc"/>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_5FC96E888242ECCF04F9DF25E6526753" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1C591E9F8416F8433E70DF25E652DBBE" xlink:to="loc_dei_EntityDomain_5FC96E888242ECCF04F9DF25E6526753" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BalckeDurrGmbHMember" xlink:label="loc_spxc_BalckeDurrGmbHMember_6D72B5CB4BD9A80265C4DF25E653509E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_5FC96E888242ECCF04F9DF25E6526753" xlink:to="loc_spxc_BalckeDurrGmbHMember_6D72B5CB4BD9A80265C4DF25E653509E" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_MutaresAGMember" xlink:label="loc_spxc_MutaresAGMember_CB3975326BDBDEE5CEF3DF25E653650A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_5FC96E888242ECCF04F9DF25E6526753" xlink:to="loc_spxc_MutaresAGMember_CB3975326BDBDEE5CEF3DF25E653650A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4A9EE990B94AE8875DB1DF25E653B69A" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30569E222E679732C53ADF25E64ECCF5" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4A9EE990B94AE8875DB1DF25E653B69A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_8AD107D9C3C16EA707EFDF25E654DA4D_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4A9EE990B94AE8875DB1DF25E653B69A" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_8AD107D9C3C16EA707EFDF25E654DA4D_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_8AD107D9C3C16EA707EFDF25E654DA4D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4A9EE990B94AE8875DB1DF25E653B69A" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_8AD107D9C3C16EA707EFDF25E654DA4D" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BalckeDurrBusinessMember" xlink:label="loc_spxc_BalckeDurrBusinessMember_65D131EE5A167DE39BD6DF25E6543F54" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_8AD107D9C3C16EA707EFDF25E654DA4D" xlink:to="loc_spxc_BalckeDurrBusinessMember_65D131EE5A167DE39BD6DF25E6543F54" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="loc_us-gaap_SubsegmentsAxis_58CE039B6A9DF6C68D45DF25E654C042" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30569E222E679732C53ADF25E64ECCF5" xlink:to="loc_us-gaap_SubsegmentsAxis_58CE039B6A9DF6C68D45DF25E654C042" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_1BFEFA71D55475BAA660DF25E654FBE9_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_58CE039B6A9DF6C68D45DF25E654C042" xlink:to="loc_us-gaap_SubsegmentsDomain_1BFEFA71D55475BAA660DF25E654FBE9_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_1BFEFA71D55475BAA660DF25E654FBE9" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_58CE039B6A9DF6C68D45DF25E654C042" xlink:to="loc_us-gaap_SubsegmentsDomain_1BFEFA71D55475BAA660DF25E654FBE9" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SPXHeatTransferBusinessMember" xlink:label="loc_spxc_SPXHeatTransferBusinessMember_844D313A10A1D844DC34DF25E655696E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_1BFEFA71D55475BAA660DF25E654FBE9" xlink:to="loc_spxc_SPXHeatTransferBusinessMember_844D313A10A1D844DC34DF25E655696E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_BF17EA4A5BD90D560466DF25E655E50E" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30569E222E679732C53ADF25E64ECCF5" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_BF17EA4A5BD90D560466DF25E655E50E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_50B1C7F4E6A1F811B3F3DF25E655285B_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_BF17EA4A5BD90D560466DF25E655E50E" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_50B1C7F4E6A1F811B3F3DF25E655285B_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_50B1C7F4E6A1F811B3F3DF25E655285B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_BF17EA4A5BD90D560466DF25E655E50E" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_50B1C7F4E6A1F811B3F3DF25E655285B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TrademarksMember" xlink:label="loc_us-gaap_TrademarksMember_70AC0DE549EFE89C2FDCDF25E656C041" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_50B1C7F4E6A1F811B3F3DF25E655285B" xlink:to="loc_us-gaap_TrademarksMember_70AC0DE549EFE89C2FDCDF25E656C041" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsMaximumExposure" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_A0A88D11CD3038E5FF96DF25E6564BB4" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_71364912780508E391FEDF25E65652C8" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_A0A88D11CD3038E5FF96DF25E6564BB4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCollateralForBorrowedSecurities" xlink:label="loc_us-gaap_CashCollateralForBorrowedSecurities_C99CDFD0F870AE83935FDF25E65670AA" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_71364912780508E391FEDF25E65652C8" xlink:to="loc_us-gaap_CashCollateralForBorrowedSecurities_C99CDFD0F870AE83935FDF25E65670AA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_EC6EAFA370A2DED7D3D5DF25E65789CF" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_71364912780508E391FEDF25E65652C8" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_EC6EAFA370A2DED7D3D5DF25E65789CF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_40C5CD7B7FD9DC026383DF25E65758B6" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_71364912780508E391FEDF25E65652C8" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_40C5CD7B7FD9DC026383DF25E65758B6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_938E9CF71764CA587C17DF25E657A2A6" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_71364912780508E391FEDF25E65652C8" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_938E9CF71764CA587C17DF25E657A2A6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquitySecuritiesFvNiCost" xlink:label="loc_us-gaap_EquitySecuritiesFvNiCost_ADB5C649941A8CB91ADADF25E6575073" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_71364912780508E391FEDF25E65652C8" xlink:to="loc_us-gaap_EquitySecuritiesFvNiCost_ADB5C649941A8CB91ADADF25E6575073" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquitySecuritiesFvNi" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_695F6649D29FC72747A5DF25E658DAB1" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_71364912780508E391FEDF25E65652C8" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_695F6649D29FC72747A5DF25E658DAB1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_80AE74B328317325DC93DF25E6581711" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_71364912780508E391FEDF25E65652C8" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_80AE74B328317325DC93DF25E6581711" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/FairValueScheduleOfFairValueAssetsAndLiabilitiesDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_980AA24FB783B610906F5830956C84D7" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_FC54084315257A8B624A58309567DB86" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_980AA24FB783B610906F5830956C84D7" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_FC54084315257A8B624A58309567DB86" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_0109EADBA843B591325558309567BC39" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_FC54084315257A8B624A58309567DB86" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_0109EADBA843B591325558309567BC39" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_4B7E14007D18B2C4EB36583095674779_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_0109EADBA843B591325558309567BC39" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_4B7E14007D18B2C4EB36583095674779_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_4B7E14007D18B2C4EB36583095674779" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_0109EADBA843B591325558309567BC39" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_4B7E14007D18B2C4EB36583095674779" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfBySaleMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_29BA82D06393BEBE075058309568BFC6" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_4B7E14007D18B2C4EB36583095674779" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_29BA82D06393BEBE075058309568BFC6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_2F1751C87FF8DCCCDCB558309568B68D" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_FC54084315257A8B624A58309567DB86" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_2F1751C87FF8DCCCDCB558309568B68D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_CB47B4830F6954C5B13E58309568C6BA_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_2F1751C87FF8DCCCDCB558309568B68D" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_CB47B4830F6954C5B13E58309568C6BA_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_CB47B4830F6954C5B13E58309568C6BA" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_2F1751C87FF8DCCCDCB558309568B68D" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_CB47B4830F6954C5B13E58309568C6BA" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BalckeDurrBusinessMember" xlink:label="loc_spxc_BalckeDurrBusinessMember_8FD0247628333558262458309568A37F" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_CB47B4830F6954C5B13E58309568C6BA" xlink:to="loc_spxc_BalckeDurrBusinessMember_8FD0247628333558262458309568A37F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsByNatureAxis" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis_B35705B44B22B4FD38CF58309569EBD9" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_FC54084315257A8B624A58309567DB86" xlink:to="loc_us-gaap_GuaranteeObligationsByNatureAxis_B35705B44B22B4FD38CF58309569EBD9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_1E3C7E694FE4251ECA9958309569C22A_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_B35705B44B22B4FD38CF58309569EBD9" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_1E3C7E694FE4251ECA9958309569C22A_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_1E3C7E694FE4251ECA9958309569C22A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_B35705B44B22B4FD38CF58309569EBD9" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_1E3C7E694FE4251ECA9958309569C22A" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_GuaranteesandBondsMember" xlink:label="loc_spxc_GuaranteesandBondsMember_BEF7D9BD4DF728EEE23958309569B83B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_1E3C7E694FE4251ECA9958309569C22A" xlink:to="loc_spxc_GuaranteesandBondsMember_BEF7D9BD4DF728EEE23958309569B83B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndemnificationGuaranteeMember" xlink:label="loc_us-gaap_IndemnificationGuaranteeMember_1815FE59C6BD430DC1865830956A1BB2" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_1E3C7E694FE4251ECA9958309569C22A" xlink:to="loc_us-gaap_IndemnificationGuaranteeMember_1815FE59C6BD430DC1865830956A1BB2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_5B3B307EB339CC0A66AD5830956A7495" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_FC54084315257A8B624A58309567DB86" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_5B3B307EB339CC0A66AD5830956A7495" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_B8BB2BB72BDD2A77C00E5830956A48D6_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_5B3B307EB339CC0A66AD5830956A7495" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_B8BB2BB72BDD2A77C00E5830956A48D6_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_5B3B307EB339CC0A66AD5830956A7495" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_B8BB2BB72BDD2A77C00E5830956A48D6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsNonrecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsNonrecurringMember_8EDD6570F3EF47947E6D5830956AB57E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_B8BB2BB72BDD2A77C00E5830956A48D6" xlink:to="loc_us-gaap_FairValueMeasurementsNonrecurringMember_8EDD6570F3EF47947E6D5830956AB57E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6C3336250896245778AB5830956BC040" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_FC54084315257A8B624A58309567DB86" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6C3336250896245778AB5830956BC040" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_459FF8F0E636B6E9606C5830956BACBA_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6C3336250896245778AB5830956BC040" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_459FF8F0E636B6E9606C5830956BACBA_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_459FF8F0E636B6E9606C5830956BACBA" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6C3336250896245778AB5830956BC040" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_459FF8F0E636B6E9606C5830956BACBA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_261F61EF7804D8EB6AD35830956C5F92" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_459FF8F0E636B6E9606C5830956BACBA" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_261F61EF7804D8EB6AD35830956C5F92" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_FairValueAssetsandLiabilitiesMeasuredonNonRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:label="loc_spxc_FairValueAssetsandLiabilitiesMeasuredonNonRecurringBasisUnobservableInputReconciliationCalculationRollForward_1D1054E5821D21029CD25830956CB5AE" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_980AA24FB783B610906F5830956C84D7" xlink:to="loc_spxc_FairValueAssetsandLiabilitiesMeasuredonNonRecurringBasisUnobservableInputReconciliationCalculationRollForward_1D1054E5821D21029CD25830956CB5AE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteesFairValueDisclosure" xlink:label="loc_us-gaap_GuaranteesFairValueDisclosure_615BB691C93B5985D6645830956C4E42" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_FairValueAssetsandLiabilitiesMeasuredonNonRecurringBasisUnobservableInputReconciliationCalculationRollForward_1D1054E5821D21029CD25830956CB5AE" xlink:to="loc_us-gaap_GuaranteesFairValueDisclosure_615BB691C93B5985D6645830956C4E42" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_8D430885D3A85532F1115830956D62B1" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_FairValueAssetsandLiabilitiesMeasuredonNonRecurringBasisUnobservableInputReconciliationCalculationRollForward_1D1054E5821D21029CD25830956CB5AE" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_8D430885D3A85532F1115830956D62B1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_59CE582B2A47FF56963C5830956D169D" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_FairValueAssetsandLiabilitiesMeasuredonNonRecurringBasisUnobservableInputReconciliationCalculationRollForward_1D1054E5821D21029CD25830956CB5AE" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_59CE582B2A47FF56963C5830956D169D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_BF48855E09ED1D19D7C35830956DACD9" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_FairValueAssetsandLiabilitiesMeasuredonNonRecurringBasisUnobservableInputReconciliationCalculationRollForward_1D1054E5821D21029CD25830956CB5AE" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_BF48855E09ED1D19D7C35830956DACD9" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/FairValueTables" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/GoodwillAndOtherIntangibleAssets" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/GoodwillAndOtherIntangibleAssetsDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="loc_us-gaap_GoodwillLineItems_D73BC810DCF344C413C8E29E505BB4D9" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_B0799CD2066C372050BCE29E5057A3F0" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_D73BC810DCF344C413C8E29E505BB4D9" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_B0799CD2066C372050BCE29E5057A3F0" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_92787CA3C5CABA388668E29E5058963A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_B0799CD2066C372050BCE29E5057A3F0" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_92787CA3C5CABA388668E29E5058963A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_40EE3B9F4ACFE88938B0E29E5058FA8C_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_92787CA3C5CABA388668E29E5058963A" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_40EE3B9F4ACFE88938B0E29E5058FA8C_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_40EE3B9F4ACFE88938B0E29E5058FA8C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_92787CA3C5CABA388668E29E5058963A" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_40EE3B9F4ACFE88938B0E29E5058FA8C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SchonstedtInstrumentCompanyMember" xlink:label="loc_spxc_SchonstedtInstrumentCompanyMember_869341A37A0D216F2C84E29E50590D18" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_40EE3B9F4ACFE88938B0E29E5058FA8C" xlink:to="loc_spxc_SchonstedtInstrumentCompanyMember_869341A37A0D216F2C84E29E50590D18" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_CuesInc.Member" xlink:label="loc_spxc_CuesInc.Member_94A21E935D31D780ECB1E29E50598553" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_40EE3B9F4ACFE88938B0E29E5058FA8C" xlink:to="loc_spxc_CuesInc.Member_94A21E935D31D780ECB1E29E50598553" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_AC58AF3E74A30E70C261E29E50595BF0" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_B0799CD2066C372050BCE29E5057A3F0" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_AC58AF3E74A30E70C261E29E50595BF0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_3BE43EACB5A8069CADF4E29E5059C3C2_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_AC58AF3E74A30E70C261E29E50595BF0" xlink:to="loc_us-gaap_SegmentDomain_3BE43EACB5A8069CADF4E29E5059C3C2_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_3BE43EACB5A8069CADF4E29E5059C3C2" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_AC58AF3E74A30E70C261E29E50595BF0" xlink:to="loc_us-gaap_SegmentDomain_3BE43EACB5A8069CADF4E29E5059C3C2" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_HVACReportableSegmentMember" xlink:label="loc_spxc_HVACReportableSegmentMember_666EE38D6D2442780A78E29E505A9A6F" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3BE43EACB5A8069CADF4E29E5059C3C2" xlink:to="loc_spxc_HVACReportableSegmentMember_666EE38D6D2442780A78E29E505A9A6F" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DetectionandMeasurementReportableSegmentMember" xlink:label="loc_spxc_DetectionandMeasurementReportableSegmentMember_F33B5DF7814FD08EA4D3E29E505A5323" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3BE43EACB5A8069CADF4E29E5059C3C2" xlink:to="loc_spxc_DetectionandMeasurementReportableSegmentMember_F33B5DF7814FD08EA4D3E29E505A5323" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_EngineeredSolutionsReportableSegmentMember" xlink:label="loc_spxc_EngineeredSolutionsReportableSegmentMember_B5CEF70E6BA1E44E3CFBE29E505A3C50" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3BE43EACB5A8069CADF4E29E5059C3C2" xlink:to="loc_spxc_EngineeredSolutionsReportableSegmentMember_B5CEF70E6BA1E44E3CFBE29E505A3C50" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllOtherSegmentsMember" xlink:label="loc_us-gaap_AllOtherSegmentsMember_68913628F35C5F127CF5E29E505A5BBE" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3BE43EACB5A8069CADF4E29E5059C3C2" xlink:to="loc_us-gaap_AllOtherSegmentsMember_68913628F35C5F127CF5E29E505A5BBE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillRollForward" xlink:label="loc_us-gaap_GoodwillRollForward_2294DA8688BB434E6FF3E29E505B2BBB" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_D73BC810DCF344C413C8E29E505BB4D9" xlink:to="loc_us-gaap_GoodwillRollForward_2294DA8688BB434E6FF3E29E505B2BBB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillGross" xlink:label="loc_us-gaap_GoodwillGross_EC1FEA8FEF3AE3E6BE1FE29E505B0BEF" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_2294DA8688BB434E6FF3E29E505B2BBB" xlink:to="loc_us-gaap_GoodwillGross_EC1FEA8FEF3AE3E6BE1FE29E505B0BEF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_029F7E153695F54C184FE29E505BC92A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_2294DA8688BB434E6FF3E29E505B2BBB" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_029F7E153695F54C184FE29E505BC92A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_1278CD60A32BAEBCB128E29E505C2CFD" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_2294DA8688BB434E6FF3E29E505B2BBB" xlink:to="loc_us-gaap_Goodwill_1278CD60A32BAEBCB128E29E505C2CFD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_1C9DA0F4F4796B101015E29E505C5840" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_2294DA8688BB434E6FF3E29E505B2BBB" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_1C9DA0F4F4796B101015E29E505C5840" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillImpairmentLoss" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_4C2E3C407F9FE5BC5F8AE29E505C9F3F" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_2294DA8688BB434E6FF3E29E505B2BBB" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_4C2E3C407F9FE5BC5F8AE29E505C9F3F" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_GrossGoodwillRelatedToForeignCurrencyTranslationAndOther" xlink:label="loc_spxc_GrossGoodwillRelatedToForeignCurrencyTranslationAndOther_77170BB22AF1D6FA3966E29E505C233C" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_2294DA8688BB434E6FF3E29E505B2BBB" xlink:to="loc_spxc_GrossGoodwillRelatedToForeignCurrencyTranslationAndOther_77170BB22AF1D6FA3966E29E505C233C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_AccumulatedImpairmentsRelatedToForeignCurrencyTranslationAndOther" xlink:label="loc_spxc_AccumulatedImpairmentsRelatedToForeignCurrencyTranslationAndOther_B4B5B791B0474E85C305E29E505C9A79" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_2294DA8688BB434E6FF3E29E505B2BBB" xlink:to="loc_spxc_AccumulatedImpairmentsRelatedToForeignCurrencyTranslationAndOther_B4B5B791B0474E85C305E29E505C9A79" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_GoodwillRelatedToForeignCurrencyTranslationAndOther" xlink:label="loc_spxc_GoodwillRelatedToForeignCurrencyTranslationAndOther_34542E6001E37DD4A20EE29E505D3FAF" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_2294DA8688BB434E6FF3E29E505B2BBB" xlink:to="loc_spxc_GoodwillRelatedToForeignCurrencyTranslationAndOther_34542E6001E37DD4A20EE29E505D3FAF" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/GoodwillAndOtherIntangibleAssetsNarrativeDetails" xlink:type="extended">

<link:loc xlink:href="spxc-20181231.xsd#spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems" xlink:label="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems_29231CD2F932D10DA773CF4278A13B3D" xlink:type="locator"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable" xlink:label="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_6D99259C13B1E4B0DF45CF42789D5BA8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems_29231CD2F932D10DA773CF4278A13B3D" xlink:to="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_6D99259C13B1E4B0DF45CF42789D5BA8" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="loc_us-gaap_SubsegmentsAxis_CFC5266CE5B3C7E1B95ECF42789D9F00" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_6D99259C13B1E4B0DF45CF42789D5BA8" xlink:to="loc_us-gaap_SubsegmentsAxis_CFC5266CE5B3C7E1B95ECF42789D9F00" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_402C0A9559F82CAD9E3FCF42789EB2F8_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_CFC5266CE5B3C7E1B95ECF42789D9F00" xlink:to="loc_us-gaap_SubsegmentsDomain_402C0A9559F82CAD9E3FCF42789EB2F8_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_402C0A9559F82CAD9E3FCF42789EB2F8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_CFC5266CE5B3C7E1B95ECF42789D9F00" xlink:to="loc_us-gaap_SubsegmentsDomain_402C0A9559F82CAD9E3FCF42789EB2F8" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SPXHeatTransferBusinessMember" xlink:label="loc_spxc_SPXHeatTransferBusinessMember_FA3773F8613E4C833B6DCF42789EAF0D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_402C0A9559F82CAD9E3FCF42789EB2F8" xlink:to="loc_spxc_SPXHeatTransferBusinessMember_FA3773F8613E4C833B6DCF42789EAF0D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_E4802CF28D14DA990E6DCF42789EEF2A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_6D99259C13B1E4B0DF45CF42789D5BA8" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_E4802CF28D14DA990E6DCF42789EEF2A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_FC64929EB792DD58C873CF42789E3A54_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_E4802CF28D14DA990E6DCF42789EEF2A" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_FC64929EB792DD58C873CF42789E3A54_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_FC64929EB792DD58C873CF42789E3A54" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_E4802CF28D14DA990E6DCF42789EEF2A" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_FC64929EB792DD58C873CF42789E3A54" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TrademarksMember" xlink:label="loc_us-gaap_TrademarksMember_02176EA5C0C77A3940B0CF42789F9834" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_FC64929EB792DD58C873CF42789E3A54" xlink:to="loc_us-gaap_TrademarksMember_02176EA5C0C77A3940B0CF42789F9834" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_CDC9700EDA2226D2087CCF42789F660F" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_6D99259C13B1E4B0DF45CF42789D5BA8" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_CDC9700EDA2226D2087CCF42789F660F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_7EFA8B71CDA9EF1165E3CF42789F48CC_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_CDC9700EDA2226D2087CCF42789F660F" xlink:to="loc_us-gaap_SegmentDomain_7EFA8B71CDA9EF1165E3CF42789F48CC_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_7EFA8B71CDA9EF1165E3CF42789F48CC" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_CDC9700EDA2226D2087CCF42789F660F" xlink:to="loc_us-gaap_SegmentDomain_7EFA8B71CDA9EF1165E3CF42789F48CC" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_HVACReportableSegmentMember" xlink:label="loc_spxc_HVACReportableSegmentMember_8EF0B65DDFC5614F745CCF4278A0D565" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_7EFA8B71CDA9EF1165E3CF42789F48CC" xlink:to="loc_spxc_HVACReportableSegmentMember_8EF0B65DDFC5614F745CCF4278A0D565" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_EngineeredSolutionsReportableSegmentMember" xlink:label="loc_spxc_EngineeredSolutionsReportableSegmentMember_93377CBF54043DFEE7B1CF4278A0C173" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_7EFA8B71CDA9EF1165E3CF42789F48CC" xlink:to="loc_spxc_EngineeredSolutionsReportableSegmentMember_93377CBF54043DFEE7B1CF4278A0C173" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DetectionandMeasurementReportableSegmentMember" xlink:label="loc_spxc_DetectionandMeasurementReportableSegmentMember_5A9E1005D858A545871FCF4278A0FEE3" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_7EFA8B71CDA9EF1165E3CF42789F48CC" xlink:to="loc_spxc_DetectionandMeasurementReportableSegmentMember_5A9E1005D858A545871FCF4278A0FEE3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_32A63FC00CE1F640CBBFCF4278A0043B" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_6D99259C13B1E4B0DF45CF42789D5BA8" xlink:to="loc_srt_RangeAxis_32A63FC00CE1F640CBBFCF4278A0043B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_C6B94B77FD4B9168AC81CF4278A01121_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_32A63FC00CE1F640CBBFCF4278A0043B" xlink:to="loc_srt_RangeMember_C6B94B77FD4B9168AC81CF4278A01121_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_C6B94B77FD4B9168AC81CF4278A01121" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_32A63FC00CE1F640CBBFCF4278A0043B" xlink:to="loc_srt_RangeMember_C6B94B77FD4B9168AC81CF4278A01121" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_E40E47896435E7960BF9CF4278A1B9C5" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_C6B94B77FD4B9168AC81CF4278A01121" xlink:to="loc_srt_MinimumMember_E40E47896435E7960BF9CF4278A1B9C5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_85A58FFE6B749B0B2035CF4278A2C556" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems_29231CD2F932D10DA773CF4278A13B3D" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_85A58FFE6B749B0B2035CF4278A2C556" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_EF36D93C3A022812ABF1CF4278A2CF25" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems_29231CD2F932D10DA773CF4278A13B3D" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_EF36D93C3A022812ABF1CF4278A2CF25" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount" xlink:label="loc_us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount_BC2149F6F93474A0E6A2CF4278A28A69" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems_29231CD2F932D10DA773CF4278A13B3D" xlink:to="loc_us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount_BC2149F6F93474A0E6A2CF4278A28A69" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_C0A793C85B3C416E60E1CF4278A227C0" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems_29231CD2F932D10DA773CF4278A13B3D" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_C0A793C85B3C416E60E1CF4278A227C0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleOfIntangibleAssets" xlink:label="loc_us-gaap_ProceedsFromSaleOfIntangibleAssets_3035058F689C2772DD6DCF4278A298D5" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems_29231CD2F932D10DA773CF4278A13B3D" xlink:to="loc_us-gaap_ProceedsFromSaleOfIntangibleAssets_3035058F689C2772DD6DCF4278A298D5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_7E8F31302F3E17384920CF4278A211DC" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems_29231CD2F932D10DA773CF4278A13B3D" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_7E8F31302F3E17384920CF4278A211DC" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/GoodwillAndOtherIntangibleAssetsScheduleOfIntangibleAssetsDetails" xlink:type="extended">

<link:loc xlink:href="spxc-20181231.xsd#spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems" xlink:label="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems_19D17C3B39F1B0797ADC615EAD22FCDE" xlink:type="locator"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable" xlink:label="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_C01F0BFCA5662B11DA9F615EAD1B8070" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems_19D17C3B39F1B0797ADC615EAD22FCDE" xlink:to="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_C01F0BFCA5662B11DA9F615EAD1B8070" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_89654EB238A8606CC4EA615EAD1BD962" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_C01F0BFCA5662B11DA9F615EAD1B8070" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_89654EB238A8606CC4EA615EAD1BD962" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_5558256C3A8723B2F5B0615EAD1B5755_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_89654EB238A8606CC4EA615EAD1BD962" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_5558256C3A8723B2F5B0615EAD1B5755_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_5558256C3A8723B2F5B0615EAD1B5755" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_89654EB238A8606CC4EA615EAD1BD962" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_5558256C3A8723B2F5B0615EAD1B5755" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationsMember" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationsMember_800EDB3BCAD525A0D655615EAD1BCDB7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_5558256C3A8723B2F5B0615EAD1B5755" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationsMember_800EDB3BCAD525A0D655615EAD1BCDB7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_FB57E538BE384C5BB161615EAD1C1A35" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_C01F0BFCA5662B11DA9F615EAD1B8070" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_FB57E538BE384C5BB161615EAD1C1A35" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_D098ADFF4DBEAA788219615EAD1CAB8C_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_FB57E538BE384C5BB161615EAD1C1A35" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_D098ADFF4DBEAA788219615EAD1CAB8C_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_D098ADFF4DBEAA788219615EAD1CAB8C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_FB57E538BE384C5BB161615EAD1C1A35" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_D098ADFF4DBEAA788219615EAD1CAB8C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SPXHeatTransferBusinessMember" xlink:label="loc_spxc_SPXHeatTransferBusinessMember_835E53320B7BC9F63727615EAD1C8201" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_D098ADFF4DBEAA788219615EAD1CAB8C" xlink:to="loc_spxc_SPXHeatTransferBusinessMember_835E53320B7BC9F63727615EAD1C8201" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_2CC18018798CA15A7E4B615EAD1D5EC1" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_C01F0BFCA5662B11DA9F615EAD1B8070" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_2CC18018798CA15A7E4B615EAD1D5EC1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_E503E3C145FE590CC53C615EAD1D8BD4_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_2CC18018798CA15A7E4B615EAD1D5EC1" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_E503E3C145FE590CC53C615EAD1D8BD4_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_E503E3C145FE590CC53C615EAD1D8BD4" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_2CC18018798CA15A7E4B615EAD1D5EC1" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_E503E3C145FE590CC53C615EAD1D8BD4" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SchonstedtInstrumentCompanyMember" xlink:label="loc_spxc_SchonstedtInstrumentCompanyMember_05C749E720BA3AF84512615EAD1DBB9C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_E503E3C145FE590CC53C615EAD1D8BD4" xlink:to="loc_spxc_SchonstedtInstrumentCompanyMember_05C749E720BA3AF84512615EAD1DBB9C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_CuesInc.Member" xlink:label="loc_spxc_CuesInc.Member_9780B7A217C802FF09A3615EAD1EF19E" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_E503E3C145FE590CC53C615EAD1D8BD4" xlink:to="loc_spxc_CuesInc.Member_9780B7A217C802FF09A3615EAD1EF19E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_BFD2C0A1ACB1991193C1615EAD1EAE0B" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_C01F0BFCA5662B11DA9F615EAD1B8070" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_BFD2C0A1ACB1991193C1615EAD1EAE0B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8DA332463BEA0585AF7E615EAD1F3F57_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_BFD2C0A1ACB1991193C1615EAD1EAE0B" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8DA332463BEA0585AF7E615EAD1F3F57_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8DA332463BEA0585AF7E615EAD1F3F57" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_BFD2C0A1ACB1991193C1615EAD1EAE0B" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8DA332463BEA0585AF7E615EAD1F3F57" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="loc_us-gaap_CustomerRelationshipsMember_D2DAEB92616FF2317BB4615EAD1F28F7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8DA332463BEA0585AF7E615EAD1F3F57" xlink:to="loc_us-gaap_CustomerRelationshipsMember_D2DAEB92616FF2317BB4615EAD1F28F7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_F9176302B03115AECDFC615EAD201C73" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8DA332463BEA0585AF7E615EAD1F3F57" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_F9176302B03115AECDFC615EAD201C73" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PatentsMember" xlink:label="loc_us-gaap_PatentsMember_EC2EE77F093006BD6E2F615EAD20D358" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8DA332463BEA0585AF7E615EAD1F3F57" xlink:to="loc_us-gaap_PatentsMember_EC2EE77F093006BD6E2F615EAD20D358" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_6BEEEB486C14A12C3F1B615EAD20A092" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8DA332463BEA0585AF7E615EAD1F3F57" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_6BEEEB486C14A12C3F1B615EAD20A092" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OrderOrProductionBacklogMember" xlink:label="loc_us-gaap_OrderOrProductionBacklogMember_EBAD34752E1BCF3C7368615EAD20BD01" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8DA332463BEA0585AF7E615EAD1F3F57" xlink:to="loc_us-gaap_OrderOrProductionBacklogMember_EBAD34752E1BCF3C7368615EAD20BD01" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_9FC5D966417A24E97C5C615EAD21934C" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_C01F0BFCA5662B11DA9F615EAD1B8070" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_9FC5D966417A24E97C5C615EAD21934C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_65AB81F78F9ACAB99BE6615EAD2110D6_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_9FC5D966417A24E97C5C615EAD21934C" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_65AB81F78F9ACAB99BE6615EAD2110D6_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_65AB81F78F9ACAB99BE6615EAD2110D6" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_9FC5D966417A24E97C5C615EAD21934C" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_65AB81F78F9ACAB99BE6615EAD2110D6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TrademarksMember" xlink:label="loc_us-gaap_TrademarksMember_C8DE78993ED1E3B544A1615EAD21DBC3" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_65AB81F78F9ACAB99BE6615EAD2110D6" xlink:to="loc_us-gaap_TrademarksMember_C8DE78993ED1E3B544A1615EAD21DBC3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_74D8353F55AD51C1230F615EAD225109" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems_19D17C3B39F1B0797ADC615EAD22FCDE" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_74D8353F55AD51C1230F615EAD225109" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_52ABF79C274A2C4B5947615EAD221C19" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_74D8353F55AD51C1230F615EAD225109" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_52ABF79C274A2C4B5947615EAD221C19" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_1A78A837E9DA292D04E3615EAD23B223" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_74D8353F55AD51C1230F615EAD225109" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_1A78A837E9DA292D04E3615EAD23B223" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_EEC8438A8FAA76965EA5615EAD23B72A" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_74D8353F55AD51C1230F615EAD225109" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_EEC8438A8FAA76965EA5615EAD23B72A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_4DEFAB3C9C33E06C6414615EAD2386E7" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_74D8353F55AD51C1230F615EAD225109" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_4DEFAB3C9C33E06C6414615EAD2386E7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_AB60A1A5BB59312E14B5615EAD236C39" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_74D8353F55AD51C1230F615EAD225109" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_AB60A1A5BB59312E14B5615EAD236C39" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationIntangibleAssets" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationIntangibleAssets_4FCEFC10BAFAB953399E615EAD2481CB" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems_19D17C3B39F1B0797ADC615EAD22FCDE" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationIntangibleAssets_4FCEFC10BAFAB953399E615EAD2481CB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwillAbstract" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwillAbstract_F7BB1C3EBA0BB0DBF4A0615EAD248A54" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems_19D17C3B39F1B0797ADC615EAD22FCDE" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwillAbstract_F7BB1C3EBA0BB0DBF4A0615EAD248A54" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_6A42275621B4A6FBB62A615EAD2483E0" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwillAbstract_F7BB1C3EBA0BB0DBF4A0615EAD248A54" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_6A42275621B4A6FBB62A615EAD2483E0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_7500300E02F9C486652F615EAD245216" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems_19D17C3B39F1B0797ADC615EAD22FCDE" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_7500300E02F9C486652F615EAD245216" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/GoodwillAndOtherIntangibleAssetsTables" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/IncomeTaxes" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/IncomeTaxesDetails" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/IncomeTaxesNarrativeDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLossCarryforwardsTable" xlink:label="loc_us-gaap_OperatingLossCarryforwardsTable_FB127BAB6AB89CFBADD8E24A302DC7AF" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_OperatingLossCarryforwardsTable_FB127BAB6AB89CFBADD8E24A302DC7AF" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_B61C8A9D0307FB95D3DCE24A302E0500" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_FB127BAB6AB89CFBADD8E24A302DC7AF" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_B61C8A9D0307FB95D3DCE24A302E0500" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_A8D854FAF214982AFEEAE24A302EA353_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_B61C8A9D0307FB95D3DCE24A302E0500" xlink:to="loc_us-gaap_TypeOfAdoptionMember_A8D854FAF214982AFEEAE24A302EA353_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_A8D854FAF214982AFEEAE24A302EA353" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_B61C8A9D0307FB95D3DCE24A302E0500" xlink:to="loc_us-gaap_TypeOfAdoptionMember_A8D854FAF214982AFEEAE24A302EA353" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201609Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201609Member_5C29526497DAB384C17DE24A302EDC7C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_A8D854FAF214982AFEEAE24A302EA353" xlink:to="loc_us-gaap_AccountingStandardsUpdate201609Member_5C29526497DAB384C17DE24A302EDC7C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_7D52CD359785E9FC42D0E24A302FE349" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_FB127BAB6AB89CFBADD8E24A302DC7AF" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_7D52CD359785E9FC42D0E24A302FE349" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_3E4675438EC7D343D37DE24A302FF56D_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_7D52CD359785E9FC42D0E24A302FE349" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_3E4675438EC7D343D37DE24A302FF56D_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_7D52CD359785E9FC42D0E24A302FE349" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_3E4675438EC7D343D37DE24A302FF56D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignCountryMember" xlink:label="loc_us-gaap_ForeignCountryMember_E3DA522E63C1AA30FE4AE24A302F4B39" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_3E4675438EC7D343D37DE24A302FF56D" xlink:to="loc_us-gaap_ForeignCountryMember_E3DA522E63C1AA30FE4AE24A302F4B39" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_966E904EC5F1C1C08BB3E24A30308BD3" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_FB127BAB6AB89CFBADD8E24A302DC7AF" xlink:to="loc_srt_RangeAxis_966E904EC5F1C1C08BB3E24A30308BD3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_3B1742975E3650B23EECE24A3030FD9F_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_966E904EC5F1C1C08BB3E24A30308BD3" xlink:to="loc_srt_RangeMember_3B1742975E3650B23EECE24A3030FD9F_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_3B1742975E3650B23EECE24A3030FD9F" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_966E904EC5F1C1C08BB3E24A30308BD3" xlink:to="loc_srt_RangeMember_3B1742975E3650B23EECE24A3030FD9F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_9E02C2FAFD08B9E60794E24A3030EB58" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_3B1742975E3650B23EECE24A3030FD9F" xlink:to="loc_srt_MinimumMember_9E02C2FAFD08B9E60794E24A3030EB58" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_9B9D5D8DB79D1AEC9E8CE24A303056BD" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_3B1742975E3650B23EECE24A3030FD9F" xlink:to="loc_srt_MaximumMember_9B9D5D8DB79D1AEC9E8CE24A303056BD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_BDDA8ED813F58FABA2FEE24A30317C5B" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_FB127BAB6AB89CFBADD8E24A302DC7AF" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_BDDA8ED813F58FABA2FEE24A30317C5B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_14BD46BB593BD92152B7E24A3031486B_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_BDDA8ED813F58FABA2FEE24A30317C5B" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_14BD46BB593BD92152B7E24A3031486B_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_14BD46BB593BD92152B7E24A3031486B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_BDDA8ED813F58FABA2FEE24A30317C5B" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_14BD46BB593BD92152B7E24A3031486B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember" xlink:label="loc_us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember_39A49353384F030B912EE24A3031831A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_14BD46BB593BD92152B7E24A3031486B" xlink:to="loc_us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember_39A49353384F030B912EE24A3031831A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_95758523FFE259E9D94DE24A30325A4C" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_FB127BAB6AB89CFBADD8E24A302DC7AF" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_95758523FFE259E9D94DE24A30325A4C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_E02598DAA9EBCCE4EA8FE24A303257AA_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_95758523FFE259E9D94DE24A30325A4C" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_E02598DAA9EBCCE4EA8FE24A303257AA_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_E02598DAA9EBCCE4EA8FE24A303257AA" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_95758523FFE259E9D94DE24A30325A4C" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_E02598DAA9EBCCE4EA8FE24A303257AA" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DryCoolingBusinessMember" xlink:label="loc_spxc_DryCoolingBusinessMember_006C7F2AA336176C7ABBE24A303259C3" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_E02598DAA9EBCCE4EA8FE24A303257AA" xlink:to="loc_spxc_DryCoolingBusinessMember_006C7F2AA336176C7ABBE24A303259C3" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateExistingIncomeTaxExpenseBenefit" xlink:label="loc_spxc_TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateExistingIncomeTaxExpenseBenefit_D9D44AAFE3E9A5895CB6E24A3033C5F6" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_spxc_TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateExistingIncomeTaxExpenseBenefit_D9D44AAFE3E9A5895CB6E24A3033C5F6" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateProvisionalIncomeTaxExpenseBenefit" xlink:label="loc_spxc_TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateProvisionalIncomeTaxExpenseBenefit_589C388B37BC5A0A0D9AE24A3033AAA0" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_spxc_TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateProvisionalIncomeTaxExpenseBenefit_589C388B37BC5A0A0D9AE24A3033AAA0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic_AC1D81D5815541B0B0B3E24A3033CF75" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic_AC1D81D5815541B0B0B3E24A3033CF75" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal_59E0CB775A404E54C1CFE24A3034547E" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal_59E0CB775A404E54C1CFE24A3034547E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign_DF5CCD2309135CF5212BE24A30344BC5" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign_DF5CCD2309135CF5212BE24A30344BC5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxCreditCarryforwardAmount" xlink:label="loc_us-gaap_TaxCreditCarryforwardAmount_BD66D8A2E2D7D359FFBCE24A3034FE97" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_TaxCreditCarryforwardAmount_BD66D8A2E2D7D359FFBCE24A3034FE97" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DeferredTaxAssetsOperatingLossAndTaxCreditCarryforwardsSubjectToExpirationDuringNext12Months" xlink:label="loc_spxc_DeferredTaxAssetsOperatingLossAndTaxCreditCarryforwardsSubjectToExpirationDuringNext12Months_577A1F0BB3AD01614936E24A3034EC4A" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_spxc_DeferredTaxAssetsOperatingLossAndTaxCreditCarryforwardsSubjectToExpirationDuringNext12Months_577A1F0BB3AD01614936E24A3034EC4A" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DeferredTaxAssetsOperatingLossAndTaxCreditCarryforwardsSubjectToExpirationInFutureYears" xlink:label="loc_spxc_DeferredTaxAssetsOperatingLossAndTaxCreditCarryforwardsSubjectToExpirationInFutureYears_0C8CAC4F4259CE64BDA2E24A303449D2" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_spxc_DeferredTaxAssetsOperatingLossAndTaxCreditCarryforwardsSubjectToExpirationInFutureYears_0C8CAC4F4259CE64BDA2E24A303449D2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:label="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_8E539F3D335DDAC675C6E24A3035EAE6" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_8E539F3D335DDAC675C6E24A3035EAE6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UndistributedEarningsOfForeignSubsidiaries" xlink:label="loc_us-gaap_UndistributedEarningsOfForeignSubsidiaries_B72B883B008D3225B270E24A3035DC02" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_UndistributedEarningsOfForeignSubsidiaries_B72B883B008D3225B270E24A3035DC02" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_DCE624CD16C9BDCA3298E24A3035D109" xlink:type="locator"/>

<link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_UnrecognizedTaxBenefits_DCE624CD16C9BDCA3298E24A3035D109" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_UnrecognizedTaxBenefitsNet" xlink:label="loc_spxc_UnrecognizedTaxBenefitsNet_FA6AA11128F908E73A5CE24A3035A52B" xlink:type="locator"/>

<link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_spxc_UnrecognizedTaxBenefitsNet_FA6AA11128F908E73A5CE24A3035A52B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_2BCDBA123A8215B1BA02E24A303520D1" xlink:type="locator"/>

<link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_2BCDBA123A8215B1BA02E24A303520D1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued_34A49E6CAC5E0CDDE40FE24A3036A0DB" xlink:type="locator"/>

<link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued_34A49E6CAC5E0CDDE40FE24A3036A0DB" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccruedNet" xlink:label="loc_spxc_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccruedNet_CFA97E4DFBDBA6FFFDE1E24A30365442" xlink:type="locator"/>

<link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_spxc_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccruedNet_CFA97E4DFBDBA6FFFDE1E24A30365442" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense_630EC2E77A991F74536CE24A3036AA57" xlink:type="locator"/>

<link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense_630EC2E77A991F74536CE24A3036AA57" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued_8D330D11D11B0C628DADE24A30369612" xlink:type="locator"/>

<link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued_8D330D11D11B0C628DADE24A30369612" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible" xlink:label="loc_us-gaap_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible_85289CF02F997CE66B9AE24A30378CF9" xlink:type="locator"/>

<link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible_85289CF02F997CE66B9AE24A30378CF9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_9459D24422F8DFAE66CFE24A30372C0F" xlink:type="locator"/>

<link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_9459D24422F8DFAE66CFE24A30372C0F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes" xlink:label="loc_us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_0C58453AA391EF9D6762E24A3037437D" xlink:type="locator"/>

<link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_0C58453AA391EF9D6762E24A3037437D" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_IncomeTaxExpenseBenefitFromAuditSettlementsAndStatuteExpiration" xlink:label="loc_spxc_IncomeTaxExpenseBenefitFromAuditSettlementsAndStatuteExpiration_D205A75708414931AAD6E24A3037124F" xlink:type="locator"/>

<link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_spxc_IncomeTaxExpenseBenefitFromAuditSettlementsAndStatuteExpiration_D205A75708414931AAD6E24A3037124F" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_EffectiveIncomeTaxReconciliationChangeinDeferredTaxAssetsValuationAllowanceForeignOperatingLossCarryforwards" xlink:label="loc_spxc_EffectiveIncomeTaxReconciliationChangeinDeferredTaxAssetsValuationAllowanceForeignOperatingLossCarryforwards_A239D91F024FE4ACB605E24A30374F57" xlink:type="locator"/>

<link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_spxc_EffectiveIncomeTaxReconciliationChangeinDeferredTaxAssetsValuationAllowanceForeignOperatingLossCarryforwards_A239D91F024FE4ACB605E24A30374F57" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationDispositionOfBusiness" xlink:label="loc_us-gaap_IncomeTaxReconciliationDispositionOfBusiness_A35D129AADAAC87DD16FE24A3038563D" xlink:type="locator"/>

<link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_IncomeTaxReconciliationDispositionOfBusiness_A35D129AADAAC87DD16FE24A3038563D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnSaleOfBusiness" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_2368244066F7463D9F71E24A3038FFFB" xlink:type="locator"/>

<link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_D638C3331358F78C852CE24A30334A11" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_2368244066F7463D9F71E24A3038FFFB" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/IncomeTaxesScheduleOfUnrecognizedTaxBenefitsDetails" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/IncomeTaxesTables" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/Indebtedness" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/IndebtednessConsolidatedLeverageRatioDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_90ED3FE6F9D4AD09D8D3E24A2FE0FF0E" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_E28DB3FD94D856E7B64FE24A2FD877C1" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_90ED3FE6F9D4AD09D8D3E24A2FE0FF0E" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_E28DB3FD94D856E7B64FE24A2FD877C1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_EB5C3A4CF2223B4F5863E24A2FD924D7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_E28DB3FD94D856E7B64FE24A2FD877C1" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_EB5C3A4CF2223B4F5863E24A2FD924D7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_916F508B2E116BCADA4AE24A2FD993EF_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_EB5C3A4CF2223B4F5863E24A2FD924D7" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_916F508B2E116BCADA4AE24A2FD993EF_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_EB5C3A4CF2223B4F5863E24A2FD924D7" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_916F508B2E116BCADA4AE24A2FD993EF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansPayableMember" xlink:label="loc_us-gaap_LoansPayableMember_574DE457457B6BCB3012E24A2FDA9F77" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_916F508B2E116BCADA4AE24A2FD993EF" xlink:to="loc_us-gaap_LoansPayableMember_574DE457457B6BCB3012E24A2FDA9F77" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_2B0779A024ACC1F0F795E24A2FDA2C49" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_E28DB3FD94D856E7B64FE24A2FD877C1" xlink:to="loc_us-gaap_CreditFacilityAxis_2B0779A024ACC1F0F795E24A2FDA2C49" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_A6786A243F6A268387A5E24A2FDA0295_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_2B0779A024ACC1F0F795E24A2FDA2C49" xlink:to="loc_us-gaap_CreditFacilityDomain_A6786A243F6A268387A5E24A2FDA0295_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_2B0779A024ACC1F0F795E24A2FDA2C49" xlink:to="loc_us-gaap_CreditFacilityDomain_A6786A243F6A268387A5E24A2FDA0295" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DomesticLineOfCreditMember" xlink:label="loc_us-gaap_DomesticLineOfCreditMember_F31840303A867D6A7523E24A2FDACA0E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_A6786A243F6A268387A5E24A2FDA0295" xlink:to="loc_us-gaap_DomesticLineOfCreditMember_F31840303A867D6A7523E24A2FDACA0E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_2DE0F63F4D06DA207516E24A2FDB7AA1" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_A6786A243F6A268387A5E24A2FDA0295" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_2DE0F63F4D06DA207516E24A2FDB7AA1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:label="loc_us-gaap_LetterOfCreditMember_51297CC13124235C9CE4E24A2FDB956C" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_A6786A243F6A268387A5E24A2FDA0295" xlink:to="loc_us-gaap_LetterOfCreditMember_51297CC13124235C9CE4E24A2FDB956C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignLineOfCreditMember" xlink:label="loc_us-gaap_ForeignLineOfCreditMember_3104F44034753356C9FFE24A2FDB2707" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_A6786A243F6A268387A5E24A2FDA0295" xlink:to="loc_us-gaap_ForeignLineOfCreditMember_3104F44034753356C9FFE24A2FDB2707" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_B675A9F5836BCA993DC9E24A2FDCE465" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_A6786A243F6A268387A5E24A2FDA0295" xlink:to="loc_us-gaap_LineOfCreditMember_B675A9F5836BCA993DC9E24A2FDCE465" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_E068736029451768DA82E24A2FDC049C" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_E28DB3FD94D856E7B64FE24A2FD877C1" xlink:to="loc_us-gaap_VariableRateAxis_E068736029451768DA82E24A2FDC049C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_0DFBD6C5BF13ADFF9F41E24A2FDC4629_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_E068736029451768DA82E24A2FDC049C" xlink:to="loc_us-gaap_VariableRateDomain_0DFBD6C5BF13ADFF9F41E24A2FDC4629_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_E068736029451768DA82E24A2FDC049C" xlink:to="loc_us-gaap_VariableRateDomain_0DFBD6C5BF13ADFF9F41E24A2FDC4629" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_8E6162983A5B851BF167E24A2FDC7FE1" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_0DFBD6C5BF13ADFF9F41E24A2FDC4629" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_8E6162983A5B851BF167E24A2FDC7FE1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BaseRateMember" xlink:label="loc_us-gaap_BaseRateMember_C9771288D9C01FD9377DE24A2FDC2E20" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_0DFBD6C5BF13ADFF9F41E24A2FDC4629" xlink:to="loc_us-gaap_BaseRateMember_C9771288D9C01FD9377DE24A2FDC2E20" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_A76ED8BB422D59912626E24A2FDDEFB6" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_E28DB3FD94D856E7B64FE24A2FD877C1" xlink:to="loc_us-gaap_DebtInstrumentAxis_A76ED8BB422D59912626E24A2FDDEFB6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_E70F9C479E9BBF163500E24A2FDDDE07_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_A76ED8BB422D59912626E24A2FDDEFB6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_E70F9C479E9BBF163500E24A2FDDDE07_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_A76ED8BB422D59912626E24A2FDDEFB6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_E70F9C479E9BBF163500E24A2FDDDE07" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SeniorCreditAgreementRange1Member" xlink:label="loc_spxc_SeniorCreditAgreementRange1Member_F9A6CE76AFCCF4E00D5DE24A2FDDD8F4" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_E70F9C479E9BBF163500E24A2FDDDE07" xlink:to="loc_spxc_SeniorCreditAgreementRange1Member_F9A6CE76AFCCF4E00D5DE24A2FDDD8F4" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SeniorCreditAgreementRange2Member" xlink:label="loc_spxc_SeniorCreditAgreementRange2Member_B21B6E23CD275D1EF6FDE24A2FDE55EA" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_E70F9C479E9BBF163500E24A2FDDDE07" xlink:to="loc_spxc_SeniorCreditAgreementRange2Member_B21B6E23CD275D1EF6FDE24A2FDE55EA" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SeniorCreditAgreementRange3Member" xlink:label="loc_spxc_SeniorCreditAgreementRange3Member_ED3F1ADB701D69CDB738E24A2FDE4554" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_E70F9C479E9BBF163500E24A2FDDDE07" xlink:to="loc_spxc_SeniorCreditAgreementRange3Member_ED3F1ADB701D69CDB738E24A2FDE4554" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SeniorCreditAgreementRange4Member" xlink:label="loc_spxc_SeniorCreditAgreementRange4Member_B9AA2F4B450D310C6423E24A2FDE1F11" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_E70F9C479E9BBF163500E24A2FDDDE07" xlink:to="loc_spxc_SeniorCreditAgreementRange4Member_B9AA2F4B450D310C6423E24A2FDE1F11" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SeniorCreditAgreementRange5Member" xlink:label="loc_spxc_SeniorCreditAgreementRange5Member_93DDA10E8120CD847EB2E24A2FDE0026" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_E70F9C479E9BBF163500E24A2FDDDE07" xlink:to="loc_spxc_SeniorCreditAgreementRange5Member_93DDA10E8120CD847EB2E24A2FDE0026" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_2F98064A650A9DFCA2F5E24A2FDF2221" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_E28DB3FD94D856E7B64FE24A2FD877C1" xlink:to="loc_srt_RangeAxis_2F98064A650A9DFCA2F5E24A2FDF2221" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_A8B7C07EEC5D50BD7694E24A2FDF5EC8_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_2F98064A650A9DFCA2F5E24A2FDF2221" xlink:to="loc_srt_RangeMember_A8B7C07EEC5D50BD7694E24A2FDF5EC8_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_A8B7C07EEC5D50BD7694E24A2FDF5EC8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_2F98064A650A9DFCA2F5E24A2FDF2221" xlink:to="loc_srt_RangeMember_A8B7C07EEC5D50BD7694E24A2FDF5EC8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_3DD4D98AE355FAE8DA14E24A2FE07269" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_A8B7C07EEC5D50BD7694E24A2FDF5EC8" xlink:to="loc_srt_MinimumMember_3DD4D98AE355FAE8DA14E24A2FE07269" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_7230A9F2B3F935B11F5CE24A2FE072AD" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_A8B7C07EEC5D50BD7694E24A2FDF5EC8" xlink:to="loc_srt_MaximumMember_7230A9F2B3F935B11F5CE24A2FE072AD" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCovenantTermsConsolidatedLeverageRatio" xlink:label="loc_spxc_DebtInstrumentCovenantTermsConsolidatedLeverageRatio_5BEB54A6460F221CAA7FE24A2FE03366" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_90ED3FE6F9D4AD09D8D3E24A2FE0FF0E" xlink:to="loc_spxc_DebtInstrumentCovenantTermsConsolidatedLeverageRatio_5BEB54A6460F221CAA7FE24A2FE03366" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_67B52E9D712530EA11F4E24A2FE12D40" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_90ED3FE6F9D4AD09D8D3E24A2FE0FF0E" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_67B52E9D712530EA11F4E24A2FE12D40" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentFeePercentage" xlink:label="loc_spxc_DebtInstrumentFeePercentage_764DF74B867FE9642092E24A2FE13955" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_90ED3FE6F9D4AD09D8D3E24A2FE0FF0E" xlink:to="loc_spxc_DebtInstrumentFeePercentage_764DF74B867FE9642092E24A2FE13955" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/IndebtednessDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_354889AF39B69DF9648FDD881396D76F" xlink:type="locator"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ScheduleOfDebtInstrumentsTable" xlink:label="loc_spxc_ScheduleOfDebtInstrumentsTable_A516083FEA79B1E00353DD8813925366" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_354889AF39B69DF9648FDD881396D76F" xlink:to="loc_spxc_ScheduleOfDebtInstrumentsTable_A516083FEA79B1E00353DD8813925366" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_48E8A2ADA8268F650D2DDE8BE902C025" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_ScheduleOfDebtInstrumentsTable_A516083FEA79B1E00353DD8813925366" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_48E8A2ADA8268F650D2DDE8BE902C025" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_8FE69233C4C870F377B9DE8BE903FDA9_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_48E8A2ADA8268F650D2DDE8BE902C025" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_8FE69233C4C870F377B9DE8BE903FDA9_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_8FE69233C4C870F377B9DE8BE903FDA9" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_48E8A2ADA8268F650D2DDE8BE902C025" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_8FE69233C4C870F377B9DE8BE903FDA9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_EB550BDD3C05D72C625BDE8C0F1731FF" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_8FE69233C4C870F377B9DE8BE903FDA9" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_EB550BDD3C05D72C625BDE8C0F1731FF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_8753A9DDDA92AD5D7571DD88139290DE" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_ScheduleOfDebtInstrumentsTable_A516083FEA79B1E00353DD8813925366" xlink:to="loc_us-gaap_CreditFacilityAxis_8753A9DDDA92AD5D7571DD88139290DE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_E66A76EBF27CFDFD2BA0DD881392E92C_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_8753A9DDDA92AD5D7571DD88139290DE" xlink:to="loc_us-gaap_CreditFacilityDomain_E66A76EBF27CFDFD2BA0DD881392E92C_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_E66A76EBF27CFDFD2BA0DD881392E92C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_8753A9DDDA92AD5D7571DD88139290DE" xlink:to="loc_us-gaap_CreditFacilityDomain_E66A76EBF27CFDFD2BA0DD881392E92C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_097CE1CC844783F5BF14DD8813924EF1" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_E66A76EBF27CFDFD2BA0DD881392E92C" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_097CE1CC844783F5BF14DD8813924EF1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansPayableMember" xlink:label="loc_us-gaap_LoansPayableMember_F22CD6B63AEB2DB7A972DD881396A2B1" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_E66A76EBF27CFDFD2BA0DD881392E92C" xlink:to="loc_us-gaap_LoansPayableMember_F22CD6B63AEB2DB7A972DD881396A2B1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_3D6B40090CD49C2E3F84DD8813968571" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_E66A76EBF27CFDFD2BA0DD881392E92C" xlink:to="loc_us-gaap_LineOfCreditMember_3D6B40090CD49C2E3F84DD8813968571" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignLineOfCreditMember" xlink:label="loc_us-gaap_ForeignLineOfCreditMember_A3D61E5272D2C62F99C8DD8813968F73" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_E66A76EBF27CFDFD2BA0DD881392E92C" xlink:to="loc_us-gaap_ForeignLineOfCreditMember_A3D61E5272D2C62F99C8DD8813968F73" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_2B8BD79CE60EB09973BEDD881396BBE3" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_ScheduleOfDebtInstrumentsTable_A516083FEA79B1E00353DD8813925366" xlink:to="loc_us-gaap_DebtInstrumentAxis_2B8BD79CE60EB09973BEDD881396BBE3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_E69C47E69B26E8C2FC5ADD8813965D67_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_2B8BD79CE60EB09973BEDD881396BBE3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_E69C47E69B26E8C2FC5ADD8813965D67_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_E69C47E69B26E8C2FC5ADD8813965D67" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_2B8BD79CE60EB09973BEDD881396BBE3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_E69C47E69B26E8C2FC5ADD8813965D67" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_CurrentRevolvingSPXFacilitiesMember" xlink:label="loc_spxc_CurrentRevolvingSPXFacilitiesMember_402CAAD645EE6379EE4FDD881396AAFE" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_E69C47E69B26E8C2FC5ADD8813965D67" xlink:to="loc_spxc_CurrentRevolvingSPXFacilitiesMember_402CAAD645EE6379EE4FDD881396AAFE" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_CurrentSPXTermLoanFacilitiesMember" xlink:label="loc_spxc_CurrentSPXTermLoanFacilitiesMember_EDA65562866BD0B4DB23DD8813965762" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_E69C47E69B26E8C2FC5ADD8813965D67" xlink:to="loc_spxc_CurrentSPXTermLoanFacilitiesMember_EDA65562866BD0B4DB23DD8813965762" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_CDFFC282D82F9440C3E1DD88139695FB" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_E69C47E69B26E8C2FC5ADD8813965D67" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_CDFFC282D82F9440C3E1DD88139695FB" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_OtherBorrowingsMember" xlink:label="loc_spxc_OtherBorrowingsMember_11C0B3A8AB1983F59A3ADD8813962DDF" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_E69C47E69B26E8C2FC5ADD8813965D67" xlink:to="loc_spxc_OtherBorrowingsMember_11C0B3A8AB1983F59A3ADD8813962DDF" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_TermLoanMember" xlink:label="loc_spxc_TermLoanMember_5A06B42052AD92C58590DD8813968406" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_E69C47E69B26E8C2FC5ADD8813965D67" xlink:to="loc_spxc_TermLoanMember_5A06B42052AD92C58590DD8813968406" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_NewTermLoanMember" xlink:label="loc_spxc_NewTermLoanMember_2A09B8E875910048851FDD881396937B" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_E69C47E69B26E8C2FC5ADD8813965D67" xlink:to="loc_spxc_NewTermLoanMember_2A09B8E875910048851FDD881396937B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_44D7C149D1911CE69AD4DD881396800B" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_ScheduleOfDebtInstrumentsTable_A516083FEA79B1E00353DD8813925366" xlink:to="loc_srt_StatementGeographicalAxis_44D7C149D1911CE69AD4DD881396800B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_EE5023A414E0842D7275DD8813961A62_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_44D7C149D1911CE69AD4DD881396800B" xlink:to="loc_srt_SegmentGeographicalDomain_EE5023A414E0842D7275DD8813961A62_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_EE5023A414E0842D7275DD8813961A62" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_44D7C149D1911CE69AD4DD881396800B" xlink:to="loc_srt_SegmentGeographicalDomain_EE5023A414E0842D7275DD8813961A62" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_CN" xlink:label="loc_country_CN_5F2DBE496579DFA9EFF9DD8813962A3C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_EE5023A414E0842D7275DD8813961A62" xlink:to="loc_country_CN_5F2DBE496579DFA9EFF9DD8813962A3C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtRollForward" xlink:label="loc_spxc_DebtRollForward_59EF65A9574E65B7674FDD881396A6BC" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_354889AF39B69DF9648FDD881396D76F" xlink:to="loc_spxc_DebtRollForward_59EF65A9574E65B7674FDD881396A6BC" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount" xlink:label="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_D10777943F79865B6595DD881396A688" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_DebtRollForward_59EF65A9574E65B7674FDD881396A6BC" xlink:to="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_D10777943F79865B6595DD881396A688" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOfDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfDebt_CA6410B07ED5FD1064CCDD88139A800E" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_DebtRollForward_59EF65A9574E65B7674FDD881396A6BC" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfDebt_CA6410B07ED5FD1064CCDD88139A800E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfDebt" xlink:label="loc_us-gaap_RepaymentsOfDebt_BC00167A19F69362D7ADDD88139A788C" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_DebtRollForward_59EF65A9574E65B7674FDD881396A6BC" xlink:to="loc_us-gaap_RepaymentsOfDebt_BC00167A19F69362D7ADDD88139A788C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentIncreaseDecreaseOtherNet" xlink:label="loc_us-gaap_DebtInstrumentIncreaseDecreaseOtherNet_6B1A2962023A8AADAE9CDD88139A902B" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_DebtRollForward_59EF65A9574E65B7674FDD881396A6BC" xlink:to="loc_us-gaap_DebtInstrumentIncreaseDecreaseOtherNet_6B1A2962023A8AADAE9CDD88139A902B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="loc_us-gaap_ShortTermBorrowings_6B716A64F2544C1B6ED3DD88139AB093" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_354889AF39B69DF9648FDD881396D76F" xlink:to="loc_us-gaap_ShortTermBorrowings_6B716A64F2544C1B6ED3DD88139AB093" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_72E140AEB07805380552DD88139B8913" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_354889AF39B69DF9648FDD881396D76F" xlink:to="loc_us-gaap_LongTermDebtCurrent_72E140AEB07805380552DD88139B8913" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_F7E76BC5BF3AF6932166DD88139B6670" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_354889AF39B69DF9648FDD881396D76F" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_F7E76BC5BF3AF6932166DD88139B6670" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_PercentageOfInitialPrincipalAmountOfTermLoanToBeRepaidAnnuallyInQuarterlyInstallments" xlink:label="loc_spxc_PercentageOfInitialPrincipalAmountOfTermLoanToBeRepaidAnnuallyInQuarterlyInstallments_032FED107910D14E0152DD88139B32D6" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_354889AF39B69DF9648FDD881396D76F" xlink:to="loc_spxc_PercentageOfInitialPrincipalAmountOfTermLoanToBeRepaidAnnuallyInQuarterlyInstallments_032FED107910D14E0152DD88139B32D6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_2F332F11C9EFE4983645DD88139B4BE6" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_354889AF39B69DF9648FDD881396D76F" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_2F332F11C9EFE4983645DD88139B4BE6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_DA5E697567C9ED0EB791DD88139B9FA0" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_354889AF39B69DF9648FDD881396D76F" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_DA5E697567C9ED0EB791DD88139B9FA0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_1B20C5D7EB720C7DDDE9DD88139B7614" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_354889AF39B69DF9648FDD881396D76F" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_1B20C5D7EB720C7DDDE9DD88139B7614" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermBankLoansAndNotesPayable" xlink:label="loc_us-gaap_ShortTermBankLoansAndNotesPayable_48DA82A8C2EFE82D75D9DD88139C5336" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_354889AF39B69DF9648FDD881396D76F" xlink:to="loc_us-gaap_ShortTermBankLoansAndNotesPayable_48DA82A8C2EFE82D75D9DD88139C5336" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeaseObligations" xlink:label="loc_us-gaap_CapitalLeaseObligations_5F056E53FF174D3D52EADD88139C9F3A" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_354889AF39B69DF9648FDD881396D76F" xlink:to="loc_us-gaap_CapitalLeaseObligations_5F056E53FF174D3D52EADD88139C9F3A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_A7A35F96B26827B5AC87DD88139CEF34" xlink:type="locator"/>

<link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_354889AF39B69DF9648FDD881396D76F" xlink:to="loc_us-gaap_LineOfCredit_A7A35F96B26827B5AC87DD88139CEF34" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/IndebtednessSeniorCreditFacilitiesDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_6F5A1D3E9D24D935C8F9DD88138334B6" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_70EDA7A0C3AC97748A65DD8813833E88" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_6F5A1D3E9D24D935C8F9DD88138334B6" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_70EDA7A0C3AC97748A65DD8813833E88" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_94A13A96EDF45D3FC554DE8A9099D0B1" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_70EDA7A0C3AC97748A65DD8813833E88" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_94A13A96EDF45D3FC554DE8A9099D0B1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_7D67EC4E78C2C35F0002DE8A909CFE2D_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_94A13A96EDF45D3FC554DE8A9099D0B1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_7D67EC4E78C2C35F0002DE8A909CFE2D_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_7D67EC4E78C2C35F0002DE8A909CFE2D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_94A13A96EDF45D3FC554DE8A9099D0B1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_7D67EC4E78C2C35F0002DE8A909CFE2D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_FDDF02A1A88B5737520CDE8ABA1EBC14" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_7D67EC4E78C2C35F0002DE8A909CFE2D" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_FDDF02A1A88B5737520CDE8ABA1EBC14" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_AD1A392547D8AB55F632DD881383C5AE" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_70EDA7A0C3AC97748A65DD8813833E88" xlink:to="loc_us-gaap_DebtInstrumentAxis_AD1A392547D8AB55F632DD881383C5AE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_B47D692E3B33E222C258DD8813837624_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_AD1A392547D8AB55F632DD881383C5AE" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_B47D692E3B33E222C258DD8813837624_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_B47D692E3B33E222C258DD8813837624" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_AD1A392547D8AB55F632DD881383C5AE" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_B47D692E3B33E222C258DD8813837624" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SeniorCreditFacilitiesMember" xlink:label="loc_spxc_SeniorCreditFacilitiesMember_93976D5487BBB4D69AFBDD881383E51B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_B47D692E3B33E222C258DD8813837624" xlink:to="loc_spxc_SeniorCreditFacilitiesMember_93976D5487BBB4D69AFBDD881383E51B" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_NewTermLoanMember" xlink:label="loc_spxc_NewTermLoanMember_EF1187B2D35699F30D51DD8813836379" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_B47D692E3B33E222C258DD8813837624" xlink:to="loc_spxc_NewTermLoanMember_EF1187B2D35699F30D51DD8813836379" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ParticipationForeignCreditInstrumentFacilityMember" xlink:label="loc_spxc_ParticipationForeignCreditInstrumentFacilityMember_1CC5147E9550F75A3FC8DD881383F6F0" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_B47D692E3B33E222C258DD8813837624" xlink:to="loc_spxc_ParticipationForeignCreditInstrumentFacilityMember_1CC5147E9550F75A3FC8DD881383F6F0" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BilateralForeignCreditInstrumentFacilityMember" xlink:label="loc_spxc_BilateralForeignCreditInstrumentFacilityMember_0989114C09C4F637CC3FDD8813833A7F" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_B47D692E3B33E222C258DD8813837624" xlink:to="loc_spxc_BilateralForeignCreditInstrumentFacilityMember_0989114C09C4F637CC3FDD8813833A7F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignLineOfCreditMember" xlink:label="loc_us-gaap_ForeignLineOfCreditMember_B3A17CF87EE9D8A8BE27DD881383F9C0" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_B47D692E3B33E222C258DD8813837624" xlink:to="loc_us-gaap_ForeignLineOfCreditMember_B3A17CF87EE9D8A8BE27DD881383F9C0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_32DD7570CCCFBCDA44E1DD8813833A8A" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_70EDA7A0C3AC97748A65DD8813833E88" xlink:to="loc_us-gaap_CreditFacilityAxis_32DD7570CCCFBCDA44E1DD8813833A8A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_2C6356FE38DAC0F51975DD88138308F8_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_32DD7570CCCFBCDA44E1DD8813833A8A" xlink:to="loc_us-gaap_CreditFacilityDomain_2C6356FE38DAC0F51975DD88138308F8_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_2C6356FE38DAC0F51975DD88138308F8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_32DD7570CCCFBCDA44E1DD8813833A8A" xlink:to="loc_us-gaap_CreditFacilityDomain_2C6356FE38DAC0F51975DD88138308F8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignLineOfCreditMember" xlink:label="loc_us-gaap_ForeignLineOfCreditMember_EF0D644E0D67DEE5EB74DD881383A47A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_2C6356FE38DAC0F51975DD88138308F8" xlink:to="loc_us-gaap_ForeignLineOfCreditMember_EF0D644E0D67DEE5EB74DD881383A47A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_667F752D50F4033CC2B5DD8813831EC9" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_2C6356FE38DAC0F51975DD88138308F8" xlink:to="loc_us-gaap_LineOfCreditMember_667F752D50F4033CC2B5DD8813831EC9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DomesticLineOfCreditMember" xlink:label="loc_us-gaap_DomesticLineOfCreditMember_810578039AA5E5FDCE66DD881383E5DA" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_2C6356FE38DAC0F51975DD88138308F8" xlink:to="loc_us-gaap_DomesticLineOfCreditMember_810578039AA5E5FDCE66DD881383E5DA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:label="loc_us-gaap_LetterOfCreditMember_72E9C2D84B29A74906F3DD8813832206" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_2C6356FE38DAC0F51975DD88138308F8" xlink:to="loc_us-gaap_LetterOfCreditMember_72E9C2D84B29A74906F3DD8813832206" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_28A6C2A3CA8E429D6A01DD881383FCB4" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_6F5A1D3E9D24D935C8F9DD88138334B6" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_28A6C2A3CA8E429D6A01DD881383FCB4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet" xlink:label="loc_us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet_9973C84FFC52A7694019DD8813878DD6" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_6F5A1D3E9D24D935C8F9DD88138334B6" xlink:to="loc_us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet_9973C84FFC52A7694019DD8813878DD6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_38894534752BBEA75F24DD881387E6DF" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_6F5A1D3E9D24D935C8F9DD88138334B6" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_38894534752BBEA75F24DD881387E6DF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WriteOffOfDeferredDebtIssuanceCost" xlink:label="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_02A4B990721BBD96CB88DD88138799F9" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_6F5A1D3E9D24D935C8F9DD88138334B6" xlink:to="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_02A4B990721BBD96CB88DD88138799F9" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCovenantTermsMaximumAmountofParticipationinLineofCreditFacility" xlink:label="loc_spxc_DebtInstrumentCovenantTermsMaximumAmountofParticipationinLineofCreditFacility_5C37BBEBC70C58037C7FDD881387889A" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_6F5A1D3E9D24D935C8F9DD88138334B6" xlink:to="loc_spxc_DebtInstrumentCovenantTermsMaximumAmountofParticipationinLineofCreditFacility_5C37BBEBC70C58037C7FDD881387889A" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCovenantTermsMaximumConsolidatedSeniorSecuredLeverageRatio" xlink:label="loc_spxc_DebtInstrumentCovenantTermsMaximumConsolidatedSeniorSecuredLeverageRatio_59BBF3B30246B494F04CDD88138706A6" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_6F5A1D3E9D24D935C8F9DD88138334B6" xlink:to="loc_spxc_DebtInstrumentCovenantTermsMaximumConsolidatedSeniorSecuredLeverageRatio_59BBF3B30246B494F04CDD88138706A6" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatio" xlink:label="loc_spxc_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatio_91546725080A0C6AC625DD88138805B9" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_6F5A1D3E9D24D935C8F9DD88138334B6" xlink:to="loc_spxc_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatio_91546725080A0C6AC625DD88138805B9" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatioafterPermittedAcquisitions" xlink:label="loc_spxc_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatioafterPermittedAcquisitions_11EE761ABE0E18415362DD8813889FA5" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_6F5A1D3E9D24D935C8F9DD88138334B6" xlink:to="loc_spxc_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatioafterPermittedAcquisitions_11EE761ABE0E18415362DD8813889FA5" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/IndebtednessSeniorDebtPriorTermLoanDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_8CD319080BBC73112B25DD88135DAECE" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_us-gaap_DebtInstrumentTable_8CD319080BBC73112B25DD88135DAECE" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_05E80AAAFCEC18DFF9E1DD88135D5D16" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8CD319080BBC73112B25DD88135DAECE" xlink:to="loc_srt_StatementGeographicalAxis_05E80AAAFCEC18DFF9E1DD88135D5D16" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_1FD60D64C3FB9A60E2B8DD88135D4796_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_05E80AAAFCEC18DFF9E1DD88135D5D16" xlink:to="loc_srt_SegmentGeographicalDomain_1FD60D64C3FB9A60E2B8DD88135D4796_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_1FD60D64C3FB9A60E2B8DD88135D4796" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_05E80AAAFCEC18DFF9E1DD88135D5D16" xlink:to="loc_srt_SegmentGeographicalDomain_1FD60D64C3FB9A60E2B8DD88135D4796" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ChinaIndiaandSouthAfricaMember" xlink:label="loc_spxc_ChinaIndiaandSouthAfricaMember_3404474DC3E17584262EDD88135D1A3E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1FD60D64C3FB9A60E2B8DD88135D4796" xlink:to="loc_spxc_ChinaIndiaandSouthAfricaMember_3404474DC3E17584262EDD88135D1A3E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_AE428A3AE1FC15ACD999DD88135D354A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8CD319080BBC73112B25DD88135DAECE" xlink:to="loc_us-gaap_CreditFacilityAxis_AE428A3AE1FC15ACD999DD88135D354A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_F4F80562C4D37228025EDD88135D86CF_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_AE428A3AE1FC15ACD999DD88135D354A" xlink:to="loc_us-gaap_CreditFacilityDomain_F4F80562C4D37228025EDD88135D86CF_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_F4F80562C4D37228025EDD88135D86CF" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_AE428A3AE1FC15ACD999DD88135D354A" xlink:to="loc_us-gaap_CreditFacilityDomain_F4F80562C4D37228025EDD88135D86CF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_84D15DFBFDE4F90E253CDD88135D243D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_F4F80562C4D37228025EDD88135D86CF" xlink:to="loc_us-gaap_LineOfCreditMember_84D15DFBFDE4F90E253CDD88135D243D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:label="loc_us-gaap_LetterOfCreditMember_3FFEB939149175B6EEF5DD88135D71E7" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_F4F80562C4D37228025EDD88135D86CF" xlink:to="loc_us-gaap_LetterOfCreditMember_3FFEB939149175B6EEF5DD88135D71E7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignLineOfCreditMember" xlink:label="loc_us-gaap_ForeignLineOfCreditMember_9A679FF5BFA47F6E7C5BDD88135D5C80" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_F4F80562C4D37228025EDD88135D86CF" xlink:to="loc_us-gaap_ForeignLineOfCreditMember_9A679FF5BFA47F6E7C5BDD88135D5C80" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DomesticLineOfCreditMember" xlink:label="loc_us-gaap_DomesticLineOfCreditMember_6BFC55B69FAB9C38D5A6DD88135DFDF0" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_F4F80562C4D37228025EDD88135D86CF" xlink:to="loc_us-gaap_DomesticLineOfCreditMember_6BFC55B69FAB9C38D5A6DD88135DFDF0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_97251799D3EBB8918E7CDD88135D6568" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_F4F80562C4D37228025EDD88135D86CF" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_97251799D3EBB8918E7CDD88135D6568" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_8A877BAE3C2AF5C0A46EDD88135D4AE4" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8CD319080BBC73112B25DD88135DAECE" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_8A877BAE3C2AF5C0A46EDD88135D4AE4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_310BBC9D5D98A7C8483ADD88135D41A5_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_8A877BAE3C2AF5C0A46EDD88135D4AE4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_310BBC9D5D98A7C8483ADD88135D41A5_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_310BBC9D5D98A7C8483ADD88135D41A5" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_8A877BAE3C2AF5C0A46EDD88135D4AE4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_310BBC9D5D98A7C8483ADD88135D41A5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansPayableMember" xlink:label="loc_us-gaap_LoansPayableMember_B69A228CC575FA362C6DDD88135D1FE3" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_310BBC9D5D98A7C8483ADD88135D41A5" xlink:to="loc_us-gaap_LoansPayableMember_B69A228CC575FA362C6DDD88135D1FE3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_DC421D1A114DA047385ADE8DF8F5CC2A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_310BBC9D5D98A7C8483ADD88135D41A5" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_DC421D1A114DA047385ADE8DF8F5CC2A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_63576ED5A14FADD895F0DD881361BA72" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8CD319080BBC73112B25DD88135DAECE" xlink:to="loc_us-gaap_DebtInstrumentAxis_63576ED5A14FADD895F0DD881361BA72" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_0FCA24BA82AFA31118F2DD88136154A6_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_63576ED5A14FADD895F0DD881361BA72" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_0FCA24BA82AFA31118F2DD88136154A6_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_0FCA24BA82AFA31118F2DD88136154A6" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_63576ED5A14FADD895F0DD881361BA72" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_0FCA24BA82AFA31118F2DD88136154A6" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SeniorCreditFacilitiesMember" xlink:label="loc_spxc_SeniorCreditFacilitiesMember_D15B74866A9746309AEFDD881361C753" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_0FCA24BA82AFA31118F2DD88136154A6" xlink:to="loc_spxc_SeniorCreditFacilitiesMember_D15B74866A9746309AEFDD881361C753" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_PurchaseCardProgramMember" xlink:label="loc_spxc_PurchaseCardProgramMember_4A161D9144920F4ABF02DD8813610149" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_0FCA24BA82AFA31118F2DD88136154A6" xlink:to="loc_spxc_PurchaseCardProgramMember_4A161D9144920F4ABF02DD8813610149" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_47B51B511DFA9CE7E50CDD8813616D85" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8CD319080BBC73112B25DD88135DAECE" xlink:to="loc_us-gaap_VariableRateAxis_47B51B511DFA9CE7E50CDD8813616D85" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_6079EA440D72A2FB85D3DD88136111E7_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_47B51B511DFA9CE7E50CDD8813616D85" xlink:to="loc_us-gaap_VariableRateDomain_6079EA440D72A2FB85D3DD88136111E7_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_6079EA440D72A2FB85D3DD88136111E7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_47B51B511DFA9CE7E50CDD8813616D85" xlink:to="loc_us-gaap_VariableRateDomain_6079EA440D72A2FB85D3DD88136111E7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BaseRateMember" xlink:label="loc_us-gaap_BaseRateMember_5F142A62F60D2EF01BFEDD881361CA2A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_6079EA440D72A2FB85D3DD88136111E7" xlink:to="loc_us-gaap_BaseRateMember_5F142A62F60D2EF01BFEDD881361CA2A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalFundsEffectiveSwapRateMember" xlink:label="loc_us-gaap_FederalFundsEffectiveSwapRateMember_63A67DDA7883D0703D9FDD881361699D" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_6079EA440D72A2FB85D3DD88136111E7" xlink:to="loc_us-gaap_FederalFundsEffectiveSwapRateMember_63A67DDA7883D0703D9FDD881361699D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_4AAE9ADFD07C1A502D23DD881361229F" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_6079EA440D72A2FB85D3DD88136111E7" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_4AAE9ADFD07C1A502D23DD881361229F" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_LondonInterbankOfferedRateLIBORPeriodOneMember" xlink:label="loc_spxc_LondonInterbankOfferedRateLIBORPeriodOneMember_CB5FF89DA03F2574994CDD881361EBC8" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_6079EA440D72A2FB85D3DD88136111E7" xlink:to="loc_spxc_LondonInterbankOfferedRateLIBORPeriodOneMember_CB5FF89DA03F2574994CDD881361EBC8" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_LondonInterbankOfferedRateLIBORPeriodTwoMember" xlink:label="loc_spxc_LondonInterbankOfferedRateLIBORPeriodTwoMember_35797F692A3414E45BFADD881361D2B7" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_6079EA440D72A2FB85D3DD88136111E7" xlink:to="loc_spxc_LondonInterbankOfferedRateLIBORPeriodTwoMember_35797F692A3414E45BFADD881361D2B7" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_LondonInterbankOfferedRateLIBORPeriodThreeMember" xlink:label="loc_spxc_LondonInterbankOfferedRateLIBORPeriodThreeMember_D4F44DF4F6088057E41DDD88136115D4" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_6079EA440D72A2FB85D3DD88136111E7" xlink:to="loc_spxc_LondonInterbankOfferedRateLIBORPeriodThreeMember_D4F44DF4F6088057E41DDD88136115D4" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_LondonInterbankOfferedRateLIBORPeriodFourMember" xlink:label="loc_spxc_LondonInterbankOfferedRateLIBORPeriodFourMember_1EBB6CCAF0AE9A05A50ADD881361EC96" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_6079EA440D72A2FB85D3DD88136111E7" xlink:to="loc_spxc_LondonInterbankOfferedRateLIBORPeriodFourMember_1EBB6CCAF0AE9A05A50ADD881361EC96" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_4606F3E254F66FF11644DD881361620E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_4606F3E254F66FF11644DD881361620E" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCovenantTermsMinimumAmountofCashandCashEquivalents" xlink:label="loc_spxc_DebtInstrumentCovenantTermsMinimumAmountofCashandCashEquivalents_BB9315E15CAC81BE4B81DD881361839B" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_spxc_DebtInstrumentCovenantTermsMinimumAmountofCashandCashEquivalents_BB9315E15CAC81BE4B81DD881361839B" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentBasisSpreadonVariableRateDurationofInterestPeriod" xlink:label="loc_spxc_DebtInstrumentBasisSpreadonVariableRateDurationofInterestPeriod_A87A3C045FCEF4A108BEDD8813612CC8" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_spxc_DebtInstrumentBasisSpreadonVariableRateDurationofInterestPeriod_A87A3C045FCEF4A108BEDD8813612CC8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtWeightedAverageInterestRate" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate_2E5FFF08033324A42BD3DD881365AADE" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_us-gaap_DebtWeightedAverageInterestRate_2E5FFF08033324A42BD3DD881365AADE" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentFrontingFee" xlink:label="loc_spxc_DebtInstrumentFrontingFee_47990F2CC4F55CB80E70DD881365C648" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_spxc_DebtInstrumentFrontingFee_47990F2CC4F55CB80E70DD881365C648" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCovenantTermsMaximumPeriodtoReinvestProceeds" xlink:label="loc_spxc_DebtInstrumentCovenantTermsMaximumPeriodtoReinvestProceeds_1E465F98D03B90785C02DD8813655115" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_spxc_DebtInstrumentCovenantTermsMaximumPeriodtoReinvestProceeds_1E465F98D03B90785C02DD8813655115" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentAdditionalPeriodtoReinvestProceedsifCommittedtobeReinvested" xlink:label="loc_spxc_DebtInstrumentAdditionalPeriodtoReinvestProceedsifCommittedtobeReinvested_F0639879751902D87AD8DD881365DE1E" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_spxc_DebtInstrumentAdditionalPeriodtoReinvestProceedsifCommittedtobeReinvested_F0639879751902D87AD8DD881365DE1E" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCollateralPercentageofCapitalStockofDomesticSubsidiaries" xlink:label="loc_spxc_DebtInstrumentCollateralPercentageofCapitalStockofDomesticSubsidiaries_D5059DBD3BF6B9380B79DD88136558B1" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_spxc_DebtInstrumentCollateralPercentageofCapitalStockofDomesticSubsidiaries_D5059DBD3BF6B9380B79DD88136558B1" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCollateralPercentageofCapitalStockofMaterialFirstTierForeignSubsidiaries" xlink:label="loc_spxc_DebtInstrumentCollateralPercentageofCapitalStockofMaterialFirstTierForeignSubsidiaries_20ED35E758DA748A934FDD881365749F" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_spxc_DebtInstrumentCollateralPercentageofCapitalStockofMaterialFirstTierForeignSubsidiaries_20ED35E758DA748A934FDD881365749F" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCovenantTermsMinimumConsolidatedInterestCoverageRatio" xlink:label="loc_spxc_DebtInstrumentCovenantTermsMinimumConsolidatedInterestCoverageRatio_E1CB4DC33249E9503236DD88136565A3" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_spxc_DebtInstrumentCovenantTermsMinimumConsolidatedInterestCoverageRatio_E1CB4DC33249E9503236DD88136565A3" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatio" xlink:label="loc_spxc_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatio_FDEEAFD2C541D860C778DD881366FC17" xlink:type="locator"/>

<link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_spxc_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatio_FDEEAFD2C541D860C778DD881366FC17" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatioafterPermittedAcquisitions" xlink:label="loc_spxc_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatioafterPermittedAcquisitions_EAD616E4CFDE94422923DD881366AF79" xlink:type="locator"/>

<link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_spxc_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatioafterPermittedAcquisitions_EAD616E4CFDE94422923DD881366AF79" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatiotoRepurchaseCapitalStockandPayDividends" xlink:label="loc_spxc_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatiotoRepurchaseCapitalStockandPayDividends_663938F8ADDB230482C4DD881366545A" xlink:type="locator"/>

<link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_spxc_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatiotoRepurchaseCapitalStockandPayDividends_663938F8ADDB230482C4DD881366545A" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCovenantTermsAggregateAmountofCapitalStockRepurchasesandDividendDeclarations" xlink:label="loc_spxc_DebtInstrumentCovenantTermsAggregateAmountofCapitalStockRepurchasesandDividendDeclarations_AF6CB3C82FC6656B81C8DD8813662945" xlink:type="locator"/>

<link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_spxc_DebtInstrumentCovenantTermsAggregateAmountofCapitalStockRepurchasesandDividendDeclarations_AF6CB3C82FC6656B81C8DD8813662945" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCovenantTermsAdditionalAmountofCapitalStockRepurchasesandDividendDeclarations" xlink:label="loc_spxc_DebtInstrumentCovenantTermsAdditionalAmountofCapitalStockRepurchasesandDividendDeclarations_5BE9459FE14D1518714BDD8813660D69" xlink:type="locator"/>

<link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_spxc_DebtInstrumentCovenantTermsAdditionalAmountofCapitalStockRepurchasesandDividendDeclarations_5BE9459FE14D1518714BDD8813660D69" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCovenantTermsPercentageofCumulativeConsolidatedNetIncome" xlink:label="loc_spxc_DebtInstrumentCovenantTermsPercentageofCumulativeConsolidatedNetIncome_5BA7CB324ABB86AC2FA5DD8813663BFE" xlink:type="locator"/>

<link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_spxc_DebtInstrumentCovenantTermsPercentageofCumulativeConsolidatedNetIncome_5BA7CB324ABB86AC2FA5DD8813663BFE" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DebtInstrumentCovenantTermsPercentageofConsolidatedNetDeficit" xlink:label="loc_spxc_DebtInstrumentCovenantTermsPercentageofConsolidatedNetDeficit_762EAAC3C8D8AF6F4F0DDD881366428E" xlink:type="locator"/>

<link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_spxc_DebtInstrumentCovenantTermsPercentageofConsolidatedNetDeficit_762EAAC3C8D8AF6F4F0DDD881366428E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_36EE174A937D2F577149DD881366C7D2" xlink:type="locator"/>

<link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_36EE174A937D2F577149DD881366C7D2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WriteOffOfDeferredDebtIssuanceCost" xlink:label="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_069F688C4EDBF7C52B64DD8813662C91" xlink:type="locator"/>

<link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_069F688C4EDBF7C52B64DD8813662C91" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_6950A085A45E60EE5406DD881366D04F" xlink:type="locator"/>

<link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_6950A085A45E60EE5406DD881366D04F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansPayable" xlink:label="loc_us-gaap_LoansPayable_76DDFF4A3346C7B04447DD881366DD46" xlink:type="locator"/>

<link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_us-gaap_LoansPayable_76DDFF4A3346C7B04447DD881366DD46" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_4EBDC2B11268C9CCA70ADD8813662AB8" xlink:type="locator"/>

<link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_4EBDC2B11268C9CCA70ADD8813662AB8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_2CD321D0E36224B439B5DD881366A604" xlink:type="locator"/>

<link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_78C27A4359E941CAC904DD881361270A" xlink:to="loc_us-gaap_LineOfCredit_2CD321D0E36224B439B5DD881366A604" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/IndebtednessTables" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/InformationOnReportableAndOtherOperatingSegments" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/InformationOnReportableAndOtherOperatingSegmentsDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_3A83293A8DD907F0B216E730B0A6425C" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_79AE2A191153F71B4647E730B09B1EAF" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3A83293A8DD907F0B216E730B0A6425C" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_79AE2A191153F71B4647E730B09B1EAF" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="loc_us-gaap_TypeOfArrangementAxis_F98573238D5C635478E8E730B09C92FA" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_79AE2A191153F71B4647E730B09B1EAF" xlink:to="loc_us-gaap_TypeOfArrangementAxis_F98573238D5C635478E8E730B09C92FA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_DA47F7D57B5FFB563535E730B09C0201_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TypeOfArrangementAxis_F98573238D5C635478E8E730B09C92FA" xlink:to="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_DA47F7D57B5FFB563535E730B09C0201_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_DA47F7D57B5FFB563535E730B09C0201" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TypeOfArrangementAxis_F98573238D5C635478E8E730B09C92FA" xlink:to="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_DA47F7D57B5FFB563535E730B09C0201" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_LargePowerProjectsMember" xlink:label="loc_spxc_LargePowerProjectsMember_1666620F1615E53EC114E730B09C98FC" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_DA47F7D57B5FFB563535E730B09C0201" xlink:to="loc_spxc_LargePowerProjectsMember_1666620F1615E53EC114E730B09C98FC" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ChangeInAccountingEstimateByTypeAxis" xlink:label="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_B8F2A0EE550E8C40B16EE730B09DC708" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_79AE2A191153F71B4647E730B09B1EAF" xlink:to="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_B8F2A0EE550E8C40B16EE730B09DC708" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ChangeInAccountingEstimateTypeDomain" xlink:label="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_CD501B3A0364E0A9F88FE730B09D9F1B_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_B8F2A0EE550E8C40B16EE730B09DC708" xlink:to="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_CD501B3A0364E0A9F88FE730B09D9F1B_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ChangeInAccountingEstimateTypeDomain" xlink:label="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_CD501B3A0364E0A9F88FE730B09D9F1B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_B8F2A0EE550E8C40B16EE730B09DC708" xlink:to="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_CD501B3A0364E0A9F88FE730B09D9F1B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractsAccountedForUnderPercentageOfCompletionMember" xlink:label="loc_us-gaap_ContractsAccountedForUnderPercentageOfCompletionMember_99462E75AB045361429AE730B09D0037" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_CD501B3A0364E0A9F88FE730B09D9F1B" xlink:to="loc_us-gaap_ContractsAccountedForUnderPercentageOfCompletionMember_99462E75AB045361429AE730B09D0037" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_BC82DDC388A09B9837ECE730B09DD3AD" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_79AE2A191153F71B4647E730B09B1EAF" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_BC82DDC388A09B9837ECE730B09DD3AD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_8C281760057BD0AE2145E730B09E9D05_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_BC82DDC388A09B9837ECE730B09DD3AD" xlink:to="loc_us-gaap_SegmentDomain_8C281760057BD0AE2145E730B09E9D05_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_8C281760057BD0AE2145E730B09E9D05" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_BC82DDC388A09B9837ECE730B09DD3AD" xlink:to="loc_us-gaap_SegmentDomain_8C281760057BD0AE2145E730B09E9D05" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_HVACReportableSegmentMember" xlink:label="loc_spxc_HVACReportableSegmentMember_FDAAFDAEE3DC0245D5C2E730B09E8543" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_8C281760057BD0AE2145E730B09E9D05" xlink:to="loc_spxc_HVACReportableSegmentMember_FDAAFDAEE3DC0245D5C2E730B09E8543" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DetectionandMeasurementReportableSegmentMember" xlink:label="loc_spxc_DetectionandMeasurementReportableSegmentMember_D9D2600652CECF6E576CE730B0A37C74" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_8C281760057BD0AE2145E730B09E9D05" xlink:to="loc_spxc_DetectionandMeasurementReportableSegmentMember_D9D2600652CECF6E576CE730B0A37C74" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_EngineeredSolutionsReportableSegmentMember" xlink:label="loc_spxc_EngineeredSolutionsReportableSegmentMember_1EE2241610CE7B0FC4EFE730B0A35C1A" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_8C281760057BD0AE2145E730B09E9D05" xlink:to="loc_spxc_EngineeredSolutionsReportableSegmentMember_1EE2241610CE7B0FC4EFE730B0A35C1A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllOtherSegmentsMember" xlink:label="loc_us-gaap_AllOtherSegmentsMember_832FE751235AAF908A04E730B0A4B723" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_8C281760057BD0AE2145E730B09E9D05" xlink:to="loc_us-gaap_AllOtherSegmentsMember_832FE751235AAF908A04E730B0A4B723" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsAxis" xlink:label="loc_srt_ConsolidationItemsAxis_558972100EC671787CF2E730B0A4683D" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_79AE2A191153F71B4647E730B09B1EAF" xlink:to="loc_srt_ConsolidationItemsAxis_558972100EC671787CF2E730B0A4683D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_B07E2FB17AE6118D4203E730B0A49059_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_558972100EC671787CF2E730B0A4683D" xlink:to="loc_srt_ConsolidationItemsDomain_B07E2FB17AE6118D4203E730B0A49059_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_B07E2FB17AE6118D4203E730B0A49059" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_558972100EC671787CF2E730B0A4683D" xlink:to="loc_srt_ConsolidationItemsDomain_B07E2FB17AE6118D4203E730B0A49059" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_5831F080218D09563622E730B0A4F69C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_B07E2FB17AE6118D4203E730B0A49059" xlink:to="loc_us-gaap_OperatingSegmentsMember_5831F080218D09563622E730B0A4F69C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="loc_us-gaap_CorporateNonSegmentMember_0230584CEF13EB459D7BE730B0A4AB7E" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_B07E2FB17AE6118D4203E730B0A49059" xlink:to="loc_us-gaap_CorporateNonSegmentMember_0230584CEF13EB459D7BE730B0A4AB7E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MaterialReconcilingItemsMember" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_F3E821B06C9B1127E1A7E730B0A5444B" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_B07E2FB17AE6118D4203E730B0A49059" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_F3E821B06C9B1127E1A7E730B0A5444B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_3453AE6EBE332B327E0FE730B0A53347" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_79AE2A191153F71B4647E730B09B1EAF" xlink:to="loc_srt_StatementGeographicalAxis_3453AE6EBE332B327E0FE730B0A53347" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_1474E50DDF9CB34C6E46E730B0A59997_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_3453AE6EBE332B327E0FE730B0A53347" xlink:to="loc_srt_SegmentGeographicalDomain_1474E50DDF9CB34C6E46E730B0A59997_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_1474E50DDF9CB34C6E46E730B0A59997" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_3453AE6EBE332B327E0FE730B0A53347" xlink:to="loc_srt_SegmentGeographicalDomain_1474E50DDF9CB34C6E46E730B0A59997" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_country_US_572E479BD75A343B615DE730B0A5545D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1474E50DDF9CB34C6E46E730B0A59997" xlink:to="loc_country_US_572E479BD75A343B615DE730B0A5545D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_CN" xlink:label="loc_country_CN_7DEEEEAE6AD91F871480E730B0A59500" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1474E50DDF9CB34C6E46E730B0A59997" xlink:to="loc_country_CN_7DEEEEAE6AD91F871480E730B0A59500" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_ZA" xlink:label="loc_country_ZA_24C015F852A231730F1FE730B0A65AB9" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1474E50DDF9CB34C6E46E730B0A59997" xlink:to="loc_country_ZA_24C015F852A231730F1FE730B0A65AB9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_GB" xlink:label="loc_country_GB_7E53A4B518ACBD6D1BD6E730B0A60B55" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1474E50DDF9CB34C6E46E730B0A59997" xlink:to="loc_country_GB_7E53A4B518ACBD6D1BD6E730B0A60B55" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_OtherForeignCountriesMember" xlink:label="loc_spxc_OtherForeignCountriesMember_E7507687C5D28C05B496E730B0A6DB86" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1474E50DDF9CB34C6E46E730B0A59997" xlink:to="loc_spxc_OtherForeignCountriesMember_E7507687C5D28C05B496E730B0A6DB86" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NumberOfCountriesInWhichEntityOperates" xlink:label="loc_us-gaap_NumberOfCountriesInWhichEntityOperates_EA4CAD61600C536A8A38E730B0A65B87" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3A83293A8DD907F0B216E730B0A6425C" xlink:to="loc_us-gaap_NumberOfCountriesInWhichEntityOperates_EA4CAD61600C536A8A38E730B0A65B87" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_NumberOfCountriesInWhichEntitySellsItsProductsAndServices" xlink:label="loc_spxc_NumberOfCountriesInWhichEntitySellsItsProductsAndServices_A0F2919A74BE5B2D3B3BE730B0A7659C" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3A83293A8DD907F0B216E730B0A6425C" xlink:to="loc_spxc_NumberOfCountriesInWhichEntitySellsItsProductsAndServices_A0F2919A74BE5B2D3B3BE730B0A7659C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:label="loc_us-gaap_NumberOfReportableSegments_03A2D8828B99AA6F7031E730B0A7E422" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3A83293A8DD907F0B216E730B0A6425C" xlink:to="loc_us-gaap_NumberOfReportableSegments_03A2D8828B99AA6F7031E730B0A7E422" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_F97C60265E1BE7CAC210E730B0A7B7E4" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3A83293A8DD907F0B216E730B0A6425C" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerAbstract_F97C60265E1BE7CAC210E730B0A7B7E4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9E91B7F2DEE249D8F957E730B0A7DF00" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_F97C60265E1BE7CAC210E730B0A7B7E4" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9E91B7F2DEE249D8F957E730B0A7DF00" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingIncomeLossAbstract" xlink:label="loc_us-gaap_OperatingIncomeLossAbstract_F429158DBEED20D52EA2E730B0A7D256" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3A83293A8DD907F0B216E730B0A6425C" xlink:to="loc_us-gaap_OperatingIncomeLossAbstract_F429158DBEED20D52EA2E730B0A7D256" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_938BBD4B38E8E351BC1EE730B0A8D4D2" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingIncomeLossAbstract_F429158DBEED20D52EA2E730B0A7D256" xlink:to="loc_us-gaap_OperatingIncomeLoss_938BBD4B38E8E351BC1EE730B0A8D4D2" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_OperatingExpense" xlink:label="loc_spxc_OperatingExpense_22FD5392E8E091AA14DFE730B0A80F72" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingIncomeLossAbstract_F429158DBEED20D52EA2E730B0A7D256" xlink:to="loc_spxc_OperatingExpense_22FD5392E8E091AA14DFE730B0A80F72" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitExpense" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitExpense_E98D5265DA81B54D3D48E730B0A8F096" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingIncomeLossAbstract_F429158DBEED20D52EA2E730B0A7D256" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitExpense_E98D5265DA81B54D3D48E730B0A8F096" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_C1348C0B780938F3A251E730B0A8EAAB" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingIncomeLossAbstract_F429158DBEED20D52EA2E730B0A7D256" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_C1348C0B780938F3A251E730B0A8EAAB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_8DE01FCA6B288F37D6ADE730B0A81BC3" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingIncomeLossAbstract_F429158DBEED20D52EA2E730B0A7D256" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_8DE01FCA6B288F37D6ADE730B0A81BC3" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SpecialCharges" xlink:label="loc_spxc_SpecialCharges_F37D1F90C61B619DD6C3E730B0A9BB4C" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingIncomeLossAbstract_F429158DBEED20D52EA2E730B0A7D256" xlink:to="loc_spxc_SpecialCharges_F37D1F90C61B619DD6C3E730B0A9BB4C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnSaleOfBusiness" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_11EC0905786852C77BC2E730B0A95550" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingIncomeLossAbstract_F429158DBEED20D52EA2E730B0A7D256" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_11EC0905786852C77BC2E730B0A95550" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireProductiveAssetsAbstract" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssetsAbstract_916F7708A9984A41A2B7E730B0A91C24" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3A83293A8DD907F0B216E730B0A6425C" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssetsAbstract_916F7708A9984A41A2B7E730B0A91C24" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireProductiveAssets" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_B7F2F08A8092EBF50C3BE730B0A9B12E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PaymentsToAcquireProductiveAssetsAbstract_916F7708A9984A41A2B7E730B0A91C24" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_B7F2F08A8092EBF50C3BE730B0A9B12E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepreciationAndAmortizationAbstract" xlink:label="loc_us-gaap_DepreciationAndAmortizationAbstract_12116A6CA098D571D66CE730B0A99BEB" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3A83293A8DD907F0B216E730B0A6425C" xlink:to="loc_us-gaap_DepreciationAndAmortizationAbstract_12116A6CA098D571D66CE730B0A99BEB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_31E28CE0BEE1F9B77FD2E730B0A9F9F3" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DepreciationAndAmortizationAbstract_12116A6CA098D571D66CE730B0A99BEB" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_31E28CE0BEE1F9B77FD2E730B0A9F9F3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_2EF22C86C48D0AE30C40E730B0AA5D3D" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3A83293A8DD907F0B216E730B0A6425C" xlink:to="loc_us-gaap_AssetsAbstract_2EF22C86C48D0AE30C40E730B0AA5D3D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_02912CFB619CA2966222E730B0AAA71D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2EF22C86C48D0AE30C40E730B0AA5D3D" xlink:to="loc_us-gaap_Assets_02912CFB619CA2966222E730B0AAA71D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsNoncurrentAbstract" xlink:label="loc_us-gaap_AssetsNoncurrentAbstract_133317560EFA0D8016F8E730B0AA31CF" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3A83293A8DD907F0B216E730B0A6425C" xlink:to="loc_us-gaap_AssetsNoncurrentAbstract_133317560EFA0D8016F8E730B0AA31CF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoncurrentAssets" xlink:label="loc_us-gaap_NoncurrentAssets_CE84D4CB579CDE820D6FE730B0AA9302" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsNoncurrentAbstract_133317560EFA0D8016F8E730B0AA31CF" xlink:to="loc_us-gaap_NoncurrentAssets_CE84D4CB579CDE820D6FE730B0AA9302" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ProceedsfromContractTermination" xlink:label="loc_spxc_ProceedsfromContractTermination_0EBD98DC828BB4EDAB6FE730B0ABAA9B" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3A83293A8DD907F0B216E730B0A6425C" xlink:to="loc_spxc_ProceedsfromContractTermination_0EBD98DC828BB4EDAB6FE730B0ABAA9B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnContractTermination" xlink:label="loc_us-gaap_GainLossOnContractTermination_B13EB799BBCF198663E9E730B0ABC877" xlink:type="locator"/>

<link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3A83293A8DD907F0B216E730B0A6425C" xlink:to="loc_us-gaap_GainLossOnContractTermination_B13EB799BBCF198663E9E730B0ABC877" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/InformationOnReportableAndOtherOperatingSegmentsTables" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/InventoriesNet" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/InventoriesNetDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InventoryLineItems" xlink:label="loc_us-gaap_InventoryLineItems_774CB74E0F03D14EA018E730B05463D9" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InventoryCurrentTable" xlink:label="loc_us-gaap_InventoryCurrentTable_690AAF9ED625C9F2FEAEE730B0525134" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_InventoryLineItems_774CB74E0F03D14EA018E730B05463D9" xlink:to="loc_us-gaap_InventoryCurrentTable_690AAF9ED625C9F2FEAEE730B0525134" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_96B693C6CBF1E588E0F7E730B052B797" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InventoryCurrentTable_690AAF9ED625C9F2FEAEE730B0525134" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_96B693C6CBF1E588E0F7E730B052B797" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_228CB3CE48A89DDE1351E730B052B159_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_96B693C6CBF1E588E0F7E730B052B797" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_228CB3CE48A89DDE1351E730B052B159_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_228CB3CE48A89DDE1351E730B052B159" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_96B693C6CBF1E588E0F7E730B052B797" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_228CB3CE48A89DDE1351E730B052B159" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_CuesInc.Member" xlink:label="loc_spxc_CuesInc.Member_581448C8200A6148D8D7E730B052E6DA" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_228CB3CE48A89DDE1351E730B052B159" xlink:to="loc_spxc_CuesInc.Member_581448C8200A6148D8D7E730B052E6DA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_04846F2D7BFD3BED8293E730B0525FFC" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InventoryCurrentTable_690AAF9ED625C9F2FEAEE730B0525134" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_04846F2D7BFD3BED8293E730B0525FFC" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_B440DBD97422E71BF550E730B0532285_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_04846F2D7BFD3BED8293E730B0525FFC" xlink:to="loc_us-gaap_TypeOfAdoptionMember_B440DBD97422E71BF550E730B0532285_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_B440DBD97422E71BF550E730B0532285" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_04846F2D7BFD3BED8293E730B0525FFC" xlink:to="loc_us-gaap_TypeOfAdoptionMember_B440DBD97422E71BF550E730B0532285" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201409Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201409Member_45FCD2D8F70D748A8912E730B05390BD" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_B440DBD97422E71BF550E730B0532285" xlink:to="loc_us-gaap_AccountingStandardsUpdate201409Member_45FCD2D8F70D748A8912E730B05390BD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_0DEB4044D11D0EDCCCE0E730B053AFC2" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InventoryCurrentTable_690AAF9ED625C9F2FEAEE730B0525134" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_0DEB4044D11D0EDCCCE0E730B053AFC2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_06DA33DA8E655EBDD78AE730B054ADF0_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_0DEB4044D11D0EDCCCE0E730B053AFC2" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_06DA33DA8E655EBDD78AE730B054ADF0_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_0DEB4044D11D0EDCCCE0E730B053AFC2" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_06DA33DA8E655EBDD78AE730B054ADF0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member" xlink:label="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_F5D1BC970D62C46D9BDEE730B054A614" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_06DA33DA8E655EBDD78AE730B054ADF0" xlink:to="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_F5D1BC970D62C46D9BDEE730B054A614" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_3033440930D889542512E7C24515E321" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_774CB74E0F03D14EA018E730B05463D9" xlink:to="loc_us-gaap_InventoryNet_3033440930D889542512E7C24515E321" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_5A02B7E2B7E2B9D6515AE730B054DB22" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_774CB74E0F03D14EA018E730B05463D9" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_5A02B7E2B7E2B9D6515AE730B054DB22" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/InventoriesNetTables" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/NewAccountingPronouncements" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/NewAccountingPronouncementsApplicationOfAsc606Details" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_C868175B2EE513D67C0EC86947C42C2B" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_3A75B60C110B789A2F1EC86947B446B2" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_C868175B2EE513D67C0EC86947C42C2B" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_3A75B60C110B789A2F1EC86947B446B2" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_276AB9F9C69281319674C86947B5EE8A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_3A75B60C110B789A2F1EC86947B446B2" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_276AB9F9C69281319674C86947B5EE8A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_855D1CA703C430B70DE6C86947B65C69_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_276AB9F9C69281319674C86947B5EE8A" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_855D1CA703C430B70DE6C86947B65C69_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_855D1CA703C430B70DE6C86947B65C69" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_276AB9F9C69281319674C86947B5EE8A" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_855D1CA703C430B70DE6C86947B65C69" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CalculatedUnderRevenueGuidanceInEffectBeforeTopic606Member" xlink:label="loc_us-gaap_CalculatedUnderRevenueGuidanceInEffectBeforeTopic606Member_CBC1B5BE53945EF5962FC86947B60BC0" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_855D1CA703C430B70DE6C86947B65C69" xlink:to="loc_us-gaap_CalculatedUnderRevenueGuidanceInEffectBeforeTopic606Member_CBC1B5BE53945EF5962FC86947B60BC0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member" xlink:label="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_1BECCAE86580DCDD9B4BC86947B65D9F" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_855D1CA703C430B70DE6C86947B65C69" xlink:to="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_1BECCAE86580DCDD9B4BC86947B65D9F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_C8D6C57F867D3251BC45C86947B698EB" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_3A75B60C110B789A2F1EC86947B446B2" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_C8D6C57F867D3251BC45C86947B698EB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_DC6CC571B4F817A7C6F1C86947BF55E1_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_C8D6C57F867D3251BC45C86947B698EB" xlink:to="loc_us-gaap_TypeOfAdoptionMember_DC6CC571B4F817A7C6F1C86947BF55E1_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_DC6CC571B4F817A7C6F1C86947BF55E1" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_C8D6C57F867D3251BC45C86947B698EB" xlink:to="loc_us-gaap_TypeOfAdoptionMember_DC6CC571B4F817A7C6F1C86947BF55E1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201409Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201409Member_B09AA0710DE74A0CB821C86947C31EDD" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_DC6CC571B4F817A7C6F1C86947BF55E1" xlink:to="loc_us-gaap_AccountingStandardsUpdate201409Member_B09AA0710DE74A0CB821C86947C31EDD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_1AEFD33047EF623B1879C86947C44119" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_C868175B2EE513D67C0EC86947C42C2B" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_1AEFD33047EF623B1879C86947C44119" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_FE621B909BBE712B3730C86947C775CD" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_C868175B2EE513D67C0EC86947C42C2B" xlink:to="loc_us-gaap_InventoryNet_FE621B909BBE712B3730C86947C775CD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerAssetNetCurrent" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetCurrent_279C978C877A813617B2C86947C92E08" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_C868175B2EE513D67C0EC86947C42C2B" xlink:to="loc_us-gaap_ContractWithCustomerAssetNetCurrent_279C978C877A813617B2C86947C92E08" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_0734363028E5C2562828C86947C9170B" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_C868175B2EE513D67C0EC86947C42C2B" xlink:to="loc_us-gaap_OtherAssetsCurrent_0734363028E5C2562828C86947C9170B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_99A6D7B16FD7BCE16977C86947CAED5D" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_C868175B2EE513D67C0EC86947C42C2B" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_99A6D7B16FD7BCE16977C86947CAED5D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiability" xlink:label="loc_us-gaap_ContractWithCustomerLiability_E39A4189B33B8892C88CC86947CA7F71" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_C868175B2EE513D67C0EC86947C42C2B" xlink:to="loc_us-gaap_ContractWithCustomerLiability_E39A4189B33B8892C88CC86947CA7F71" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_3C4DD337319861DA0886C86947CA8127" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_C868175B2EE513D67C0EC86947C42C2B" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_3C4DD337319861DA0886C86947CA8127" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_59EF251D5448408F7012C86947CB0174" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_C868175B2EE513D67C0EC86947C42C2B" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_59EF251D5448408F7012C86947CB0174" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_F8A0F384C898ADCB1EA5C86947CB833A" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_C868175B2EE513D67C0EC86947C42C2B" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_F8A0F384C898ADCB1EA5C86947CB833A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_50F7E3009F9762FA42C8C86947CC9B65" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_C868175B2EE513D67C0EC86947C42C2B" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_50F7E3009F9762FA42C8C86947CC9B65" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/NewAccountingPronouncementsNarrativeDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_A032B4A07D55DF46BC48E2306806DE0B" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D19C60C10702F59AC42AE23068030A89" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_A032B4A07D55DF46BC48E2306806DE0B" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D19C60C10702F59AC42AE23068030A89" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_994429344EE0EE2DC2A0E23068032B6A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D19C60C10702F59AC42AE23068030A89" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_994429344EE0EE2DC2A0E23068032B6A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_4D14326D5DA8975B134BE230680322AC_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_994429344EE0EE2DC2A0E23068032B6A" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_4D14326D5DA8975B134BE230680322AC_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_4D14326D5DA8975B134BE230680322AC" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_994429344EE0EE2DC2A0E23068032B6A" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_4D14326D5DA8975B134BE230680322AC" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_FBC3AB2297B53457E1B1E2306803AD61" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_4D14326D5DA8975B134BE230680322AC" xlink:to="loc_us-gaap_SubsequentEventMember_FBC3AB2297B53457E1B1E2306803AD61" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_A11434F135B0C8E6181CE230680442C1" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D19C60C10702F59AC42AE23068030A89" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_A11434F135B0C8E6181CE230680442C1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_F8BD4A88E55B341CB079E23068041EAF_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_A11434F135B0C8E6181CE230680442C1" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_F8BD4A88E55B341CB079E23068041EAF_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_F8BD4A88E55B341CB079E23068041EAF" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_A11434F135B0C8E6181CE230680442C1" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_F8BD4A88E55B341CB079E23068041EAF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member" xlink:label="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_7106EE0B3FA16D21952FE2306804E6F9" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_F8BD4A88E55B341CB079E23068041EAF" xlink:to="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_7106EE0B3FA16D21952FE2306804E6F9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_DE8EB00B529A61C68D4DE23068049556" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D19C60C10702F59AC42AE23068030A89" xlink:to="loc_us-gaap_StatementScenarioAxis_DE8EB00B529A61C68D4DE23068049556" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_15D9DC016BEBCDCA7180E23068045730_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_DE8EB00B529A61C68D4DE23068049556" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_15D9DC016BEBCDCA7180E23068045730_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_15D9DC016BEBCDCA7180E23068045730" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_DE8EB00B529A61C68D4DE23068049556" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_15D9DC016BEBCDCA7180E23068045730" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioForecastMember" xlink:label="loc_us-gaap_ScenarioForecastMember_E832B3BE5C065FCB1EEDE2306805E965" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_15D9DC016BEBCDCA7180E23068045730" xlink:to="loc_us-gaap_ScenarioForecastMember_E832B3BE5C065FCB1EEDE2306805E965" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_0CF46DFFD47391F2C936E2306805621C" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_D19C60C10702F59AC42AE23068030A89" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_0CF46DFFD47391F2C936E2306805621C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_881972ABA6961AB57049E23068057556_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_0CF46DFFD47391F2C936E2306805621C" xlink:to="loc_us-gaap_TypeOfAdoptionMember_881972ABA6961AB57049E23068057556_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_881972ABA6961AB57049E23068057556" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_0CF46DFFD47391F2C936E2306805621C" xlink:to="loc_us-gaap_TypeOfAdoptionMember_881972ABA6961AB57049E23068057556" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201601Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201601Member_5A3F25F53F8A91398B05E230680581CE" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_881972ABA6961AB57049E23068057556" xlink:to="loc_us-gaap_AccountingStandardsUpdate201601Member_5A3F25F53F8A91398B05E230680581CE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201602Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201602Member_7E83F26BF06567FB49BDE2306806C92F" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_881972ABA6961AB57049E23068057556" xlink:to="loc_us-gaap_AccountingStandardsUpdate201602Member_7E83F26BF06567FB49BDE2306806C92F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201615Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201615Member_865705A598F5BD7679ABE23068067FB3" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_881972ABA6961AB57049E23068057556" xlink:to="loc_us-gaap_AccountingStandardsUpdate201615Member_865705A598F5BD7679ABE23068067FB3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201616Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201616Member_BCE4190B0DD376EBCF2CE2306806329B" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_881972ABA6961AB57049E23068057556" xlink:to="loc_us-gaap_AccountingStandardsUpdate201616Member_BCE4190B0DD376EBCF2CE2306806329B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201707Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201707Member_815D4871AEF3BDE8DE05E2306806128E" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_881972ABA6961AB57049E23068057556" xlink:to="loc_us-gaap_AccountingStandardsUpdate201707Member_815D4871AEF3BDE8DE05E2306806128E" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_AccountingStandardsUpdate201802Member" xlink:label="loc_spxc_AccountingStandardsUpdate201802Member_BBE45A055439D2DD45E8E2306806CF99" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_881972ABA6961AB57049E23068057556" xlink:to="loc_spxc_AccountingStandardsUpdate201802Member_BBE45A055439D2DD45E8E2306806CF99" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_4395BEF980DFE70BF36BE2306807B14A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_A032B4A07D55DF46BC48E2306806DE0B" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_4395BEF980DFE70BF36BE2306807B14A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_2E3B2488CF6F2340E0ABE23068072D70" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_A032B4A07D55DF46BC48E2306806DE0B" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_2E3B2488CF6F2340E0ABE23068072D70" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaap_OperatingLeaseLiability_2C86EABC7C66A83071D9E23068070D23" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_A032B4A07D55DF46BC48E2306806DE0B" xlink:to="loc_us-gaap_OperatingLeaseLiability_2C86EABC7C66A83071D9E23068070D23" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromLifeInsurancePolicies" xlink:label="loc_us-gaap_ProceedsFromLifeInsurancePolicies_C77EC778D015B3E0C163E2306807A813" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_A032B4A07D55DF46BC48E2306806DE0B" xlink:to="loc_us-gaap_ProceedsFromLifeInsurancePolicies_C77EC778D015B3E0C163E2306807A813" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_AF19BB2E61B77BBE1F74E23068076A84" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_A032B4A07D55DF46BC48E2306806DE0B" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_AF19BB2E61B77BBE1F74E23068076A84" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent" xlink:label="loc_us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent_B3A3F60F703DD5C6A615E23068084CD7" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_A032B4A07D55DF46BC48E2306806DE0B" xlink:to="loc_us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent_B3A3F60F703DD5C6A615E23068084CD7" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/NewAccountingPronouncementsTables" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/QuarterlyResultsUnaudited" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/QuarterlyResultsUnauditedDetails" xlink:type="extended">

<link:loc xlink:href="spxc-20181231.xsd#spxc_QuarterlyFinancialInformationLineItems" xlink:label="loc_spxc_QuarterlyFinancialInformationLineItems_C03BA538DBD10E3893CBE730ADAF2791" xlink:type="locator"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_QuarterlyFinancialInformationDisclosureTable" xlink:label="loc_spxc_QuarterlyFinancialInformationDisclosureTable_D88D62BB16991F57C696E730ADA81540" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_spxc_QuarterlyFinancialInformationLineItems_C03BA538DBD10E3893CBE730ADAF2791" xlink:to="loc_spxc_QuarterlyFinancialInformationDisclosureTable_D88D62BB16991F57C696E730ADA81540" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_A22E60D5BFEF842A5413E730ADA87429" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_QuarterlyFinancialInformationDisclosureTable_D88D62BB16991F57C696E730ADA81540" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_A22E60D5BFEF842A5413E730ADA87429" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_364663CD4FD9B3A1FB58E730ADA87A5D_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_A22E60D5BFEF842A5413E730ADA87429" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_364663CD4FD9B3A1FB58E730ADA87A5D_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_364663CD4FD9B3A1FB58E730ADA87A5D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_A22E60D5BFEF842A5413E730ADA87429" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_364663CD4FD9B3A1FB58E730ADA87A5D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfBySaleMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_28C886646672FD0E872FE730ADA94487" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_364663CD4FD9B3A1FB58E730ADA87A5D" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_28C886646672FD0E872FE730ADA94487" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4502F8500B501E27DE86E730ADA9ABE6" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_QuarterlyFinancialInformationDisclosureTable_D88D62BB16991F57C696E730ADA81540" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4502F8500B501E27DE86E730ADA9ABE6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_FE7447495B3CF2B4FBEAE730ADA9BE3E_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4502F8500B501E27DE86E730ADA9ABE6" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_FE7447495B3CF2B4FBEAE730ADA9BE3E_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_FE7447495B3CF2B4FBEAE730ADA9BE3E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4502F8500B501E27DE86E730ADA9ABE6" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_FE7447495B3CF2B4FBEAE730ADA9BE3E" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BalckeDurrBusinessMember" xlink:label="loc_spxc_BalckeDurrBusinessMember_0E70158022D3AAF7B120E730ADAA9ED2" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_FE7447495B3CF2B4FBEAE730ADA9BE3E" xlink:to="loc_spxc_BalckeDurrBusinessMember_0E70158022D3AAF7B120E730ADAA9ED2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CounterpartyNameAxis" xlink:label="loc_srt_CounterpartyNameAxis_5BB179DAA42778E8CC10E730ADAA5CA1" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_QuarterlyFinancialInformationDisclosureTable_D88D62BB16991F57C696E730ADA81540" xlink:to="loc_srt_CounterpartyNameAxis_5BB179DAA42778E8CC10E730ADAA5CA1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_B815B5CC00D50EBBACABE730ADAA0B96_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_5BB179DAA42778E8CC10E730ADAA5CA1" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_B815B5CC00D50EBBACABE730ADAA0B96_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_B815B5CC00D50EBBACABE730ADAA0B96" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_5BB179DAA42778E8CC10E730ADAA5CA1" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_B815B5CC00D50EBBACABE730ADAA0B96" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SubsidiaryofmutaresAGtheBuyerMember" xlink:label="loc_spxc_SubsidiaryofmutaresAGtheBuyerMember_5A3A0D24675BA76B7CBAE730ADAA923E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_B815B5CC00D50EBBACABE730ADAA0B96" xlink:to="loc_spxc_SubsidiaryofmutaresAGtheBuyerMember_5A3A0D24675BA76B7CBAE730ADAA923E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanNameAxis" xlink:label="loc_us-gaap_RetirementPlanNameAxis_94EEE063D36BD40CE7C9E730ADAA55EF" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_QuarterlyFinancialInformationDisclosureTable_D88D62BB16991F57C696E730ADA81540" xlink:to="loc_us-gaap_RetirementPlanNameAxis_94EEE063D36BD40CE7C9E730ADAA55EF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanNameDomain" xlink:label="loc_us-gaap_RetirementPlanNameDomain_73628B27236C22993306E730ADAAC09C_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanNameAxis_94EEE063D36BD40CE7C9E730ADAA55EF" xlink:to="loc_us-gaap_RetirementPlanNameDomain_73628B27236C22993306E730ADAAC09C_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanNameDomain" xlink:label="loc_us-gaap_RetirementPlanNameDomain_73628B27236C22993306E730ADAAC09C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanNameAxis_94EEE063D36BD40CE7C9E730ADAA55EF" xlink:to="loc_us-gaap_RetirementPlanNameDomain_73628B27236C22993306E730ADAAC09C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_U.S.PostretirementPlanOPEBMember" xlink:label="loc_spxc_U.S.PostretirementPlanOPEBMember_1D98B2BBA5F03DE0D996E730ADABB3FA" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanNameDomain_73628B27236C22993306E730ADAAC09C" xlink:to="loc_spxc_U.S.PostretirementPlanOPEBMember_1D98B2BBA5F03DE0D996E730ADABB3FA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_254F04AD1C051E518082E730ADABECD7" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_QuarterlyFinancialInformationDisclosureTable_D88D62BB16991F57C696E730ADA81540" xlink:to="loc_srt_StatementGeographicalAxis_254F04AD1C051E518082E730ADABECD7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_1B683DCC2720C2CB72CAE730ADAB1F2B_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_254F04AD1C051E518082E730ADABECD7" xlink:to="loc_srt_SegmentGeographicalDomain_1B683DCC2720C2CB72CAE730ADAB1F2B_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_1B683DCC2720C2CB72CAE730ADAB1F2B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_254F04AD1C051E518082E730ADABECD7" xlink:to="loc_srt_SegmentGeographicalDomain_1B683DCC2720C2CB72CAE730ADAB1F2B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_ZA" xlink:label="loc_country_ZA_68C4162921CA6AD31098E730ADAB0B6C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1B683DCC2720C2CB72CAE730ADAB1F2B" xlink:to="loc_country_ZA_68C4162921CA6AD31098E730ADAB0B6C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="loc_us-gaap_TypeOfArrangementAxis_3C7963442B64A4BD21F7E730ADACC5E0" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_QuarterlyFinancialInformationDisclosureTable_D88D62BB16991F57C696E730ADA81540" xlink:to="loc_us-gaap_TypeOfArrangementAxis_3C7963442B64A4BD21F7E730ADACC5E0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_005021B23808ACC7F6C4E730ADACE19A_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TypeOfArrangementAxis_3C7963442B64A4BD21F7E730ADACC5E0" xlink:to="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_005021B23808ACC7F6C4E730ADACE19A_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_005021B23808ACC7F6C4E730ADACE19A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TypeOfArrangementAxis_3C7963442B64A4BD21F7E730ADACC5E0" xlink:to="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_005021B23808ACC7F6C4E730ADACE19A" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_LargePowerProjectsMember" xlink:label="loc_spxc_LargePowerProjectsMember_94D72937637082AE4385E730ADACD9D9" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_005021B23808ACC7F6C4E730ADACE19A" xlink:to="loc_spxc_LargePowerProjectsMember_94D72937637082AE4385E730ADACD9D9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsAxis" xlink:label="loc_srt_ConsolidationItemsAxis_F27D5811DB8D10534099E730ADACA7C6" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_QuarterlyFinancialInformationDisclosureTable_D88D62BB16991F57C696E730ADA81540" xlink:to="loc_srt_ConsolidationItemsAxis_F27D5811DB8D10534099E730ADACA7C6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_D7D44298FA06C0CABA47E730ADADB197_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_F27D5811DB8D10534099E730ADACA7C6" xlink:to="loc_srt_ConsolidationItemsDomain_D7D44298FA06C0CABA47E730ADADB197_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_D7D44298FA06C0CABA47E730ADADB197" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_F27D5811DB8D10534099E730ADACA7C6" xlink:to="loc_srt_ConsolidationItemsDomain_D7D44298FA06C0CABA47E730ADADB197" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_3DF51452625CCD2E2C18E730ADADD461" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_D7D44298FA06C0CABA47E730ADADB197" xlink:to="loc_us-gaap_OperatingSegmentsMember_3DF51452625CCD2E2C18E730ADADD461" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_A4E4ECC9016951119317E730ADADE7DD" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_QuarterlyFinancialInformationDisclosureTable_D88D62BB16991F57C696E730ADA81540" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_A4E4ECC9016951119317E730ADADE7DD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_DD62E9A9B1D43B5509DBE730ADADB606_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_A4E4ECC9016951119317E730ADADE7DD" xlink:to="loc_us-gaap_SegmentDomain_DD62E9A9B1D43B5509DBE730ADADB606_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_DD62E9A9B1D43B5509DBE730ADADB606" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_A4E4ECC9016951119317E730ADADE7DD" xlink:to="loc_us-gaap_SegmentDomain_DD62E9A9B1D43B5509DBE730ADADB606" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_EngineeredSolutionsReportableSegmentMember" xlink:label="loc_spxc_EngineeredSolutionsReportableSegmentMember_70F00643F34C2945A257E730ADAE0ADD" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_DD62E9A9B1D43B5509DBE730ADADB606" xlink:to="loc_spxc_EngineeredSolutionsReportableSegmentMember_70F00643F34C2945A257E730ADAE0ADD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllOtherSegmentsMember" xlink:label="loc_us-gaap_AllOtherSegmentsMember_FF5F04E580F9988BCBACE7F46D6062CD" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_DD62E9A9B1D43B5509DBE730ADADB606" xlink:to="loc_us-gaap_AllOtherSegmentsMember_FF5F04E580F9988BCBACE7F46D6062CD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ChangeInAccountingEstimateByTypeAxis" xlink:label="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_A913C037DA1EE24A17C3E730ADAE1EFD" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_spxc_QuarterlyFinancialInformationDisclosureTable_D88D62BB16991F57C696E730ADA81540" xlink:to="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_A913C037DA1EE24A17C3E730ADAE1EFD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ChangeInAccountingEstimateTypeDomain" xlink:label="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_F23E2DB9A5DAD177926DE730ADAE3C67_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_A913C037DA1EE24A17C3E730ADAE1EFD" xlink:to="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_F23E2DB9A5DAD177926DE730ADAE3C67_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ChangeInAccountingEstimateTypeDomain" xlink:label="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_F23E2DB9A5DAD177926DE730ADAE3C67" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_A913C037DA1EE24A17C3E730ADAE1EFD" xlink:to="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_F23E2DB9A5DAD177926DE730ADAE3C67" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractsAccountedForUnderPercentageOfCompletionMember" xlink:label="loc_us-gaap_ContractsAccountedForUnderPercentageOfCompletionMember_886678488455EDB2792DE730ADAEBEE4" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_F23E2DB9A5DAD177926DE730ADAE3C67" xlink:to="loc_us-gaap_ContractsAccountedForUnderPercentageOfCompletionMember_886678488455EDB2792DE730ADAEBEE4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_A04958A1E9203D403A19E730ADAFED8B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_QuarterlyFinancialInformationLineItems_C03BA538DBD10E3893CBE730ADAF2791" xlink:to="loc_us-gaap_OperatingIncomeLoss_A04958A1E9203D403A19E730ADAFED8B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_98A56ACCA96B6C30DDFAE7E3D2672CF4" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_QuarterlyFinancialInformationLineItems_C03BA538DBD10E3893CBE730ADAF2791" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_98A56ACCA96B6C30DDFAE7E3D2672CF4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_012064BC7EFF26F4E10DE730ADAF146D" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_QuarterlyFinancialInformationLineItems_C03BA538DBD10E3893CBE730ADAF2791" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_012064BC7EFF26F4E10DE730ADAF146D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligationIncreaseDecreaseForRemeasurementDueToSettlement" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationIncreaseDecreaseForRemeasurementDueToSettlement_52487ABE84216435E3F9E730ADAF1F81" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_QuarterlyFinancialInformationLineItems_C03BA538DBD10E3893CBE730ADAF2791" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligationIncreaseDecreaseForRemeasurementDueToSettlement_52487ABE84216435E3F9E730ADAF1F81" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnContractTermination" xlink:label="loc_us-gaap_GainLossOnContractTermination_EB95AE1F03166271D4B9E730ADAFE2A8" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_QuarterlyFinancialInformationLineItems_C03BA538DBD10E3893CBE730ADAF2791" xlink:to="loc_us-gaap_GainLossOnContractTermination_EB95AE1F03166271D4B9E730ADAFE2A8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit_28EBB7180D48BAF2CB67E730ADAF2385" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_QuarterlyFinancialInformationLineItems_C03BA538DBD10E3893CBE730ADAF2791" xlink:to="loc_us-gaap_DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit_28EBB7180D48BAF2CB67E730ADAF2385" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_IncomeTaxExpenseBenefitFromLossOnInvestmentInForeignSubsidiary" xlink:label="loc_spxc_IncomeTaxExpenseBenefitFromLossOnInvestmentInForeignSubsidiary_F379C313F6A0AEC2B140E730ADB0ABD0" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_QuarterlyFinancialInformationLineItems_C03BA538DBD10E3893CBE730ADAF2791" xlink:to="loc_spxc_IncomeTaxExpenseBenefitFromLossOnInvestmentInForeignSubsidiary_F379C313F6A0AEC2B140E730ADB0ABD0" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateExistingIncomeTaxExpenseBenefit" xlink:label="loc_spxc_TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateExistingIncomeTaxExpenseBenefit_AB426D6E9CDDE8C88311E730ADB0A322" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_QuarterlyFinancialInformationLineItems_C03BA538DBD10E3893CBE730ADAF2791" xlink:to="loc_spxc_TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateExistingIncomeTaxExpenseBenefit_AB426D6E9CDDE8C88311E730ADB0A322" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationAmountOfAdjustmentToPriorPeriodGainLossOnDisposalNetOfTax" xlink:label="loc_us-gaap_DiscontinuedOperationAmountOfAdjustmentToPriorPeriodGainLossOnDisposalNetOfTax_0A4924BC662EDA1CCC0EE730ADB0FA10" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_QuarterlyFinancialInformationLineItems_C03BA538DBD10E3893CBE730ADAF2791" xlink:to="loc_us-gaap_DiscontinuedOperationAmountOfAdjustmentToPriorPeriodGainLossOnDisposalNetOfTax_0A4924BC662EDA1CCC0EE730ADB0FA10" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_AE8974FF11E8CA156DBEE730ADB0FA57" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_QuarterlyFinancialInformationLineItems_C03BA538DBD10E3893CBE730ADAF2791" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_AE8974FF11E8CA156DBEE730ADB0FA57" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/QuarterlyResultsUnauditedTables" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/RevenuesFromContracts" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/RevenuesFromContractsDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_361C10FCAEBA7A4241E3E74D0349E38F" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_30A16CD829A1AE2AAB81E74D03455665" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_361C10FCAEBA7A4241E3E74D0349E38F" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_30A16CD829A1AE2AAB81E74D03455665" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_5944A507E6C66535025DE74D03452AA7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_30A16CD829A1AE2AAB81E74D03455665" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_5944A507E6C66535025DE74D03452AA7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_EC22CB91EDC0840AF43FE74D0346E6C4_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_5944A507E6C66535025DE74D03452AA7" xlink:to="loc_us-gaap_SegmentDomain_EC22CB91EDC0840AF43FE74D0346E6C4_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_EC22CB91EDC0840AF43FE74D0346E6C4" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_5944A507E6C66535025DE74D03452AA7" xlink:to="loc_us-gaap_SegmentDomain_EC22CB91EDC0840AF43FE74D0346E6C4" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_HVACReportableSegmentMember" xlink:label="loc_spxc_HVACReportableSegmentMember_BDB113396AAD68067107E74D034650D6" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_EC22CB91EDC0840AF43FE74D0346E6C4" xlink:to="loc_spxc_HVACReportableSegmentMember_BDB113396AAD68067107E74D034650D6" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DetectionandMeasurementReportableSegmentMember" xlink:label="loc_spxc_DetectionandMeasurementReportableSegmentMember_14637F32770A6B61869DE74D0346380C" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_EC22CB91EDC0840AF43FE74D0346E6C4" xlink:to="loc_spxc_DetectionandMeasurementReportableSegmentMember_14637F32770A6B61869DE74D0346380C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_EngineeredSolutionsReportableSegmentMember" xlink:label="loc_spxc_EngineeredSolutionsReportableSegmentMember_B0ABF72111ABCA36F677E74D0347DC51" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_EC22CB91EDC0840AF43FE74D0346E6C4" xlink:to="loc_spxc_EngineeredSolutionsReportableSegmentMember_B0ABF72111ABCA36F677E74D0347DC51" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllOtherSegmentsMember" xlink:label="loc_us-gaap_AllOtherSegmentsMember_D9CD8D3C20686427B1A5E74D0347E620" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_EC22CB91EDC0840AF43FE74D0346E6C4" xlink:to="loc_us-gaap_AllOtherSegmentsMember_D9CD8D3C20686427B1A5E74D0347E620" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ProductOrServiceAxis" xlink:label="loc_srt_ProductOrServiceAxis_3E68096852565F9D9566E74D03474882" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_30A16CD829A1AE2AAB81E74D03455665" xlink:to="loc_srt_ProductOrServiceAxis_3E68096852565F9D9566E74D03474882" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_862957DE3CDE2277EF42E74D0347746C_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_3E68096852565F9D9566E74D03474882" xlink:to="loc_srt_ProductsAndServicesDomain_862957DE3CDE2277EF42E74D0347746C_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_3E68096852565F9D9566E74D03474882" xlink:to="loc_srt_ProductsAndServicesDomain_862957DE3CDE2277EF42E74D0347746C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_CoolingEquipmentAndServicesMember" xlink:label="loc_spxc_CoolingEquipmentAndServicesMember_93C4A8453BA61593EE81E74D0347C073" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_862957DE3CDE2277EF42E74D0347746C" xlink:to="loc_spxc_CoolingEquipmentAndServicesMember_93C4A8453BA61593EE81E74D0347C073" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_HeatingandVentilationMember" xlink:label="loc_spxc_HeatingandVentilationMember_88CE2174098923B4D141E74D03485F5E" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_862957DE3CDE2277EF42E74D0347746C" xlink:to="loc_spxc_HeatingandVentilationMember_88CE2174098923B4D141E74D03485F5E" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_UndergroundPipeLocatorsandInspectionsEquipmentMember" xlink:label="loc_spxc_UndergroundPipeLocatorsandInspectionsEquipmentMember_63E19B1AFA0F7A240E74E74D0348B137" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_862957DE3CDE2277EF42E74D0347746C" xlink:to="loc_spxc_UndergroundPipeLocatorsandInspectionsEquipmentMember_63E19B1AFA0F7A240E74E74D0348B137" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_CommunicationTechnologiesandBusFareCollectionSystemsMember" xlink:label="loc_spxc_CommunicationTechnologiesandBusFareCollectionSystemsMember_C5A9909ED49C81100F34E74D0348C8B7" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_862957DE3CDE2277EF42E74D0347746C" xlink:to="loc_spxc_CommunicationTechnologiesandBusFareCollectionSystemsMember_C5A9909ED49C81100F34E74D0348C8B7" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_PowerTransformersMember" xlink:label="loc_spxc_PowerTransformersMember_BBFF54B45A768130A5A6E74D034821B5" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_862957DE3CDE2277EF42E74D0347746C" xlink:to="loc_spxc_PowerTransformersMember_BBFF54B45A768130A5A6E74D034821B5" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ProcessCoolingProjectsMember" xlink:label="loc_spxc_ProcessCoolingProjectsMember_CFEE0B051BFD01303224E74D0348BA24" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_862957DE3CDE2277EF42E74D0347746C" xlink:to="loc_spxc_ProcessCoolingProjectsMember_CFEE0B051BFD01303224E74D0348BA24" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SouthAfricanProjectsMember" xlink:label="loc_spxc_SouthAfricanProjectsMember_0A3245C0C848478E0E72E74D0348E453" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_862957DE3CDE2277EF42E74D0347746C" xlink:to="loc_spxc_SouthAfricanProjectsMember_0A3245C0C848478E0E72E74D0348E453" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceAxis" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_05A70B9E1C7F8A72FC56E74D03499878" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_30A16CD829A1AE2AAB81E74D03455665" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_05A70B9E1C7F8A72FC56E74D03499878" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9B4A889E058A48B2E468E74D0349769F_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_05A70B9E1C7F8A72FC56E74D03499878" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9B4A889E058A48B2E468E74D0349769F_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_05A70B9E1C7F8A72FC56E74D03499878" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9B4A889E058A48B2E468E74D0349769F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TransferredAtPointInTimeMember" xlink:label="loc_us-gaap_TransferredAtPointInTimeMember_74ED0598F6D2CC2A9568E74D03497F31" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9B4A889E058A48B2E468E74D0349769F" xlink:to="loc_us-gaap_TransferredAtPointInTimeMember_74ED0598F6D2CC2A9568E74D03497F31" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TransferredOverTimeMember" xlink:label="loc_us-gaap_TransferredOverTimeMember_4885F88FA892FF7B16ADE74D0349A49B" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9B4A889E058A48B2E468E74D0349769F" xlink:to="loc_us-gaap_TransferredOverTimeMember_4885F88FA892FF7B16ADE74D0349A49B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_FA421B2DE15CA591CE09E74D034AEEAB" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_361C10FCAEBA7A4241E3E74D0349E38F" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_FA421B2DE15CA591CE09E74D034AEEAB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsReceivableNet" xlink:label="loc_us-gaap_AccountsReceivableNet_040F58848C8C094AC9C8E74D034A314F" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_361C10FCAEBA7A4241E3E74D0349E38F" xlink:to="loc_us-gaap_AccountsReceivableNet_040F58848C8C094AC9C8E74D034A314F" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_IncreaseDecreaseinAccountsReceivableNet" xlink:label="loc_spxc_IncreaseDecreaseinAccountsReceivableNet_18D610D50DFADB550B61E74D034A0CAC" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_361C10FCAEBA7A4241E3E74D0349E38F" xlink:to="loc_spxc_IncreaseDecreaseinAccountsReceivableNet_18D610D50DFADB550B61E74D034A0CAC" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerAssetNetCurrent" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetCurrent_B5D89DC22C5CCB5D3F9EE74D034A96A7" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_361C10FCAEBA7A4241E3E74D0349E38F" xlink:to="loc_us-gaap_ContractWithCustomerAssetNetCurrent_B5D89DC22C5CCB5D3F9EE74D034A96A7" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_IncreaseDecreaseinContractwithCustomerAssetNetCurrent" xlink:label="loc_spxc_IncreaseDecreaseinContractwithCustomerAssetNetCurrent_AF314F85805F6154F654E74D034A3EAE" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_361C10FCAEBA7A4241E3E74D0349E38F" xlink:to="loc_spxc_IncreaseDecreaseinContractwithCustomerAssetNetCurrent_AF314F85805F6154F654E74D034A3EAE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_14AF1597767900DF1F81E74D034B5CF6" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_361C10FCAEBA7A4241E3E74D0349E38F" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_14AF1597767900DF1F81E74D034B5CF6" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_IncreaseDecreaseinContractwithCustomerLiabilityCurrent" xlink:label="loc_spxc_IncreaseDecreaseinContractwithCustomerLiabilityCurrent_E2A137FD651DF0144DA8E74D034BA806" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_361C10FCAEBA7A4241E3E74D0349E38F" xlink:to="loc_spxc_IncreaseDecreaseinContractwithCustomerLiabilityCurrent_E2A137FD651DF0144DA8E74D034BA806" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_E44851C4EE3E4B265FB5E74D034BA4C4" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_361C10FCAEBA7A4241E3E74D0349E38F" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_E44851C4EE3E4B265FB5E74D034BA4C4" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_IncreaseDecreaseinContractwithCustomerLiabilityNoncurrent" xlink:label="loc_spxc_IncreaseDecreaseinContractwithCustomerLiabilityNoncurrent_861274D083EE4EF5AD3EE74D034B8777" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_361C10FCAEBA7A4241E3E74D0349E38F" xlink:to="loc_spxc_IncreaseDecreaseinContractwithCustomerLiabilityNoncurrent_861274D083EE4EF5AD3EE74D034B8777" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ContractwithCustomersNet" xlink:label="loc_spxc_ContractwithCustomersNet_D45DAAC30AC04E596DABE74D034B3D60" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_361C10FCAEBA7A4241E3E74D0349E38F" xlink:to="loc_spxc_ContractwithCustomersNet_D45DAAC30AC04E596DABE74D034B3D60" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_IncreaseDecreaseinContractwithCustomersNet" xlink:label="loc_spxc_IncreaseDecreaseinContractwithCustomersNet_1A221C0D6BE2287F269AE74D034BBE86" xlink:type="locator"/>

<link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_361C10FCAEBA7A4241E3E74D0349E38F" xlink:to="loc_spxc_IncreaseDecreaseinContractwithCustomersNet_1A221C0D6BE2287F269AE74D034BBE86" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/RevenuesFromContractsEffectOfAsc606Details" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems" xlink:label="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable" xlink:label="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_1BDD78244BEA91436F97E29E511F65F9" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_1BDD78244BEA91436F97E29E511F65F9" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_5AE5A4C728BF5D4C5546E29E512024E8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_1BDD78244BEA91436F97E29E511F65F9" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_5AE5A4C728BF5D4C5546E29E512024E8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_CF9928516A621763F3FBE29E51207438_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_5AE5A4C728BF5D4C5546E29E512024E8" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_CF9928516A621763F3FBE29E51207438_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_CF9928516A621763F3FBE29E51207438" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_5AE5A4C728BF5D4C5546E29E512024E8" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_CF9928516A621763F3FBE29E51207438" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member" xlink:label="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_BEF0F282D72885E3FBEBE29E5121B8C4" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_CF9928516A621763F3FBE29E51207438" xlink:to="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_BEF0F282D72885E3FBEBE29E5121B8C4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CalculatedUnderRevenueGuidanceInEffectBeforeTopic606Member" xlink:label="loc_us-gaap_CalculatedUnderRevenueGuidanceInEffectBeforeTopic606Member_BE1B63C9775173B18A99E29E51214B30" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_CF9928516A621763F3FBE29E51207438" xlink:to="loc_us-gaap_CalculatedUnderRevenueGuidanceInEffectBeforeTopic606Member_BE1B63C9775173B18A99E29E51214B30" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_EF034913551FFD169ABEE29E512196A2" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_1BDD78244BEA91436F97E29E511F65F9" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_EF034913551FFD169ABEE29E512196A2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_AB091C0E4129F0F92B16E29E512114B6_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_EF034913551FFD169ABEE29E512196A2" xlink:to="loc_us-gaap_TypeOfAdoptionMember_AB091C0E4129F0F92B16E29E512114B6_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_AB091C0E4129F0F92B16E29E512114B6" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_EF034913551FFD169ABEE29E512196A2" xlink:to="loc_us-gaap_TypeOfAdoptionMember_AB091C0E4129F0F92B16E29E512114B6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201409Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201409Member_3D2AC1061303C975C3D9E29E5122347A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_AB091C0E4129F0F92B16E29E512114B6" xlink:to="loc_us-gaap_AccountingStandardsUpdate201409Member_3D2AC1061303C975C3D9E29E5122347A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_87D6DCBB44EFFEA99E5EE29E51236577" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_87D6DCBB44EFFEA99E5EE29E51236577" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_8A09DA4DADDE4CEC7A7BE29E51237303" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_8A09DA4DADDE4CEC7A7BE29E51237303" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_D71B72134832C843046FE29E5123F59A" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_D71B72134832C843046FE29E5123F59A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_C97B2A0EB7BD12212EF2E29E51235FCC" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_OperatingIncomeLoss_C97B2A0EB7BD12212EF2E29E51235FCC" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_3AE23DF9AAA9FD5ACB4CE29E5123170B" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_3AE23DF9AAA9FD5ACB4CE29E5123170B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_9DF9FBA80ADA09CD7EB0E29E5129AC62" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_9DF9FBA80ADA09CD7EB0E29E5129AC62" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_BBB60651DC77EF79377BE29E5129D916" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_BBB60651DC77EF79377BE29E5129D916" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_7675335830A9D0982B09E29E5129158F" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_ProfitLoss_7675335830A9D0982B09E29E5129158F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_94A48E080A0DA1564685E29E512A0C93" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_94A48E080A0DA1564685E29E512A0C93" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_EA59CCB0D05B6132C876E29E512A6A70" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_EA59CCB0D05B6132C876E29E512A6A70" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_D0FC43284E4B242E3E12E29E512A021B" xlink:type="locator"/>

<link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_EarningsPerShareBasic_D0FC43284E4B242E3E12E29E512A021B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_B6115057F361326FA8EBE29E512A711F" xlink:type="locator"/>

<link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_B6115057F361326FA8EBE29E512A711F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_2CD750624AF573D93EA4E29E512AEE38" xlink:type="locator"/>

<link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_EarningsPerShareDiluted_2CD750624AF573D93EA4E29E512AEE38" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_CFAFFD7158BBEE5E24FDE29E512A1A9E" xlink:type="locator"/>

<link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_CFAFFD7158BBEE5E24FDE29E512A1A9E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerAssetNetCurrent" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetCurrent_5049ECDADD9864139DC4E29E512B76EF" xlink:type="locator"/>

<link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_ContractWithCustomerAssetNetCurrent_5049ECDADD9864139DC4E29E512B76EF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_5F94C62AC7E2F0FA9F84E29E512BAB1A" xlink:type="locator"/>

<link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_InventoryNet_5F94C62AC7E2F0FA9F84E29E512BAB1A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_216CB1B61A9CD7841A43E29E512B8C54" xlink:type="locator"/>

<link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_OtherAssetsCurrent_216CB1B61A9CD7841A43E29E512B8C54" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_9044C38B9C0BF9B765D8E29E512B1CBA" xlink:type="locator"/>

<link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_AssetsCurrent_9044C38B9C0BF9B765D8E29E512B1CBA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_825DB7D982E4B504170DE29E512B01FE" xlink:type="locator"/>

<link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_825DB7D982E4B504170DE29E512B01FE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_D220C28C85436E19AAD6E29E512CDBB4" xlink:type="locator"/>

<link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_Assets_D220C28C85436E19AAD6E29E512CDBB4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_3F9CB8DE6A8522FD9D78E29E512C870A" xlink:type="locator"/>

<link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_3F9CB8DE6A8522FD9D78E29E512C870A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_DFAF14362FF5D04F7719E29E512C285E" xlink:type="locator"/>

<link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_DFAF14362FF5D04F7719E29E512C285E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_8197324F329D2D1E0C1AE29E512C15E6" xlink:type="locator"/>

<link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_LiabilitiesCurrent_8197324F329D2D1E0C1AE29E512C15E6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_3911A7EC88FFD5393E7FE29E512C0F00" xlink:type="locator"/>

<link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_3911A7EC88FFD5393E7FE29E512C0F00" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_F9A86A6BB0554439ADAEE29E512DC83E" xlink:type="locator"/>

<link:definitionArc order="25" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_F9A86A6BB0554439ADAEE29E512DC83E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_196F4F08632191ED87F7E29E512DC5A0" xlink:type="locator"/>

<link:definitionArc order="26" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_196F4F08632191ED87F7E29E512DC5A0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_C27A15109F05A78F0CA6E29E512D72B1" xlink:type="locator"/>

<link:definitionArc order="27" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_C27A15109F05A78F0CA6E29E512D72B1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_25D77031DEC6400C665FE29E512D0107" xlink:type="locator"/>

<link:definitionArc order="28" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_25D77031DEC6400C665FE29E512D0107" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_44277FB3BA7EEAF53C99E29E512DD034" xlink:type="locator"/>

<link:definitionArc order="29" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_68D76669A7046CA99ED0E29E5122614C" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_44277FB3BA7EEAF53C99E29E512DD034" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/RevenuesFromContractsNarrativeDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_EE43F01AA018A1E8F172E9787C9BB85E" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_2D969904601FC33324F2E9787C8FC193" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_EE43F01AA018A1E8F172E9787C9BB85E" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_2D969904601FC33324F2E9787C8FC193" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ProductOrServiceAxis" xlink:label="loc_srt_ProductOrServiceAxis_A9EB829673CD4DD32AF7E9787C8F09BF" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_2D969904601FC33324F2E9787C8FC193" xlink:to="loc_srt_ProductOrServiceAxis_A9EB829673CD4DD32AF7E9787C8F09BF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_D561273BBD2822A31633E9787C90B6D9_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_A9EB829673CD4DD32AF7E9787C8F09BF" xlink:to="loc_srt_ProductsAndServicesDomain_D561273BBD2822A31633E9787C90B6D9_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_D561273BBD2822A31633E9787C90B6D9" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_A9EB829673CD4DD32AF7E9787C8F09BF" xlink:to="loc_srt_ProductsAndServicesDomain_D561273BBD2822A31633E9787C90B6D9" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_PowerTransformersMember" xlink:label="loc_spxc_PowerTransformersMember_1EA3BA93243A9F3E9949E9787C90FEC8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_D561273BBD2822A31633E9787C90B6D9" xlink:to="loc_spxc_PowerTransformersMember_1EA3BA93243A9F3E9949E9787C90FEC8" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ProcessCoolingProjectsMember" xlink:label="loc_spxc_ProcessCoolingProjectsMember_F077DA0AE40970A6A517E9787C90E77A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_D561273BBD2822A31633E9787C90B6D9" xlink:to="loc_spxc_ProcessCoolingProjectsMember_F077DA0AE40970A6A517E9787C90E77A" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SPXHeatTransferBusinessMember" xlink:label="loc_spxc_SPXHeatTransferBusinessMember_6D817DB09994434403C9E9787C9125B4" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_D561273BBD2822A31633E9787C90B6D9" xlink:to="loc_spxc_SPXHeatTransferBusinessMember_6D817DB09994434403C9E9787C9125B4" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SouthAfricanProjectsMember" xlink:label="loc_spxc_SouthAfricanProjectsMember_4DAA87811D28024965B8E9787C91AFAD" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_D561273BBD2822A31633E9787C90B6D9" xlink:to="loc_spxc_SouthAfricanProjectsMember_4DAA87811D28024965B8E9787C91AFAD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_02612F2E9468A4E5C398E9787C91BFF4" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_2D969904601FC33324F2E9787C8FC193" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_02612F2E9468A4E5C398E9787C91BFF4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_B7FFF0C3EBCAB1AAD85EE9787C91EC68_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_02612F2E9468A4E5C398E9787C91BFF4" xlink:to="loc_us-gaap_SegmentDomain_B7FFF0C3EBCAB1AAD85EE9787C91EC68_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_B7FFF0C3EBCAB1AAD85EE9787C91EC68" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_02612F2E9468A4E5C398E9787C91BFF4" xlink:to="loc_us-gaap_SegmentDomain_B7FFF0C3EBCAB1AAD85EE9787C91EC68" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_HVACReportableSegmentMember" xlink:label="loc_spxc_HVACReportableSegmentMember_F1AF35EC170170F4E1DBE9787C9256B4" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_B7FFF0C3EBCAB1AAD85EE9787C91EC68" xlink:to="loc_spxc_HVACReportableSegmentMember_F1AF35EC170170F4E1DBE9787C9256B4" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DetectionandMeasurementReportableSegmentMember" xlink:label="loc_spxc_DetectionandMeasurementReportableSegmentMember_1827F4AF771C0E5CB245E9787C924A8C" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_B7FFF0C3EBCAB1AAD85EE9787C91EC68" xlink:to="loc_spxc_DetectionandMeasurementReportableSegmentMember_1827F4AF771C0E5CB245E9787C924A8C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_EngineeredSolutionsReportableSegmentMember" xlink:label="loc_spxc_EngineeredSolutionsReportableSegmentMember_FFA4F8FF90E17979F020E9787C92B8C8" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_B7FFF0C3EBCAB1AAD85EE9787C91EC68" xlink:to="loc_spxc_EngineeredSolutionsReportableSegmentMember_FFA4F8FF90E17979F020E9787C92B8C8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_DF959746737E214E13BAE9787C93B71A" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_2D969904601FC33324F2E9787C8FC193" xlink:to="loc_srt_RangeAxis_DF959746737E214E13BAE9787C93B71A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_4DDAAA68D3C2A2BDC637E9787C939448_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_DF959746737E214E13BAE9787C93B71A" xlink:to="loc_srt_RangeMember_4DDAAA68D3C2A2BDC637E9787C939448_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_4DDAAA68D3C2A2BDC637E9787C939448" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_DF959746737E214E13BAE9787C93B71A" xlink:to="loc_srt_RangeMember_4DDAAA68D3C2A2BDC637E9787C939448" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_0B5943AE38FB758AAB6CE9787C93ABD7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_4DDAAA68D3C2A2BDC637E9787C939448" xlink:to="loc_srt_MinimumMember_0B5943AE38FB758AAB6CE9787C93ABD7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_C5AE46EF8C0BCEE11DE3E9787C947221" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_4DDAAA68D3C2A2BDC637E9787C939448" xlink:to="loc_srt_MaximumMember_C5AE46EF8C0BCEE11DE3E9787C947221" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="loc_us-gaap_TypeOfArrangementAxis_04736B2B93A85E601048E9787C94CE8A" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_2D969904601FC33324F2E9787C8FC193" xlink:to="loc_us-gaap_TypeOfArrangementAxis_04736B2B93A85E601048E9787C94CE8A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_B13C6326B462C75DAF31E9787C947BC1_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TypeOfArrangementAxis_04736B2B93A85E601048E9787C94CE8A" xlink:to="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_B13C6326B462C75DAF31E9787C947BC1_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_B13C6326B462C75DAF31E9787C947BC1" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TypeOfArrangementAxis_04736B2B93A85E601048E9787C94CE8A" xlink:to="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_B13C6326B462C75DAF31E9787C947BC1" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_LargePowerProjectsMember" xlink:label="loc_spxc_LargePowerProjectsMember_1AFDA16A1C0A7DDFA173E9787C94C06A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_B13C6326B462C75DAF31E9787C947BC1" xlink:to="loc_spxc_LargePowerProjectsMember_1AFDA16A1C0A7DDFA173E9787C94C06A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_293BA475819D28D5EFE1E9787C9AEEAD" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_2D969904601FC33324F2E9787C8FC193" xlink:to="loc_srt_StatementGeographicalAxis_293BA475819D28D5EFE1E9787C9AEEAD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_E803A8F7567F22EDB3C3E9787C9A361B_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_293BA475819D28D5EFE1E9787C9AEEAD" xlink:to="loc_srt_SegmentGeographicalDomain_E803A8F7567F22EDB3C3E9787C9A361B_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_E803A8F7567F22EDB3C3E9787C9A361B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_293BA475819D28D5EFE1E9787C9AEEAD" xlink:to="loc_srt_SegmentGeographicalDomain_E803A8F7567F22EDB3C3E9787C9A361B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_ZA" xlink:label="loc_country_ZA_9CD70FAAB6BDE388CEA1E9787C9A3371" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_E803A8F7567F22EDB3C3E9787C9A361B" xlink:to="loc_country_ZA_9CD70FAAB6BDE388CEA1E9787C9A3371" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnapprovedChangeOrdersAmount" xlink:label="loc_us-gaap_UnapprovedChangeOrdersAmount_00E1F21C72909E3A453DE9787C9B7474" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_EE43F01AA018A1E8F172E9787C9BB85E" xlink:to="loc_us-gaap_UnapprovedChangeOrdersAmount_00E1F21C72909E3A453DE9787C9B7474" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_CustomerContractTerms" xlink:label="loc_spxc_CustomerContractTerms_4A7BA8A07D8C788CCF27E9787C9BC765" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_EE43F01AA018A1E8F172E9787C9BB85E" xlink:to="loc_spxc_CustomerContractTerms_4A7BA8A07D8C788CCF27E9787C9BC765" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/RevenuesFromContractsRemainingPerformanceObligationsDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_53E7BFFE8C9BB59D47F9E26ED05D6456" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_C45E35AEBFF95900C5D9E26ED043D129" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_53E7BFFE8C9BB59D47F9E26ED05D6456" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_C45E35AEBFF95900C5D9E26ED043D129" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_EDF3CC2B13B6778F188EE26ED058C053" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_C45E35AEBFF95900C5D9E26ED043D129" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_EDF3CC2B13B6778F188EE26ED058C053" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_2E6FAB6F162416722460E24A3195A316" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_53E7BFFE8C9BB59D47F9E26ED05D6456" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_2E6FAB6F162416722460E24A3195A316" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationPercentage" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_45B2DBB846166F22BA85E24A31963D64" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_53E7BFFE8C9BB59D47F9E26ED05D6456" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_45B2DBB846166F22BA85E24A31963D64" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/RevenuesFromContractsTables" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensation" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationAociDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_8636470313BD0BDCADB5E730ADF3DB7B" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_779B81F100FE299049D9E730ADF02F79" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_8636470313BD0BDCADB5E730ADF3DB7B" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_779B81F100FE299049D9E730ADF02F79" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_4E5983B56FC87F5E9B4FE730ADF0551B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_779B81F100FE299049D9E730ADF02F79" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_4E5983B56FC87F5E9B4FE730ADF0551B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_70AB7B0176F08D47AC5DE730ADF07955_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_4E5983B56FC87F5E9B4FE730ADF0551B" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_70AB7B0176F08D47AC5DE730ADF07955_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_70AB7B0176F08D47AC5DE730ADF07955" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_4E5983B56FC87F5E9B4FE730ADF0551B" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_70AB7B0176F08D47AC5DE730ADF07955" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherExpenseMember" xlink:label="loc_us-gaap_OtherExpenseMember_746A5F899D5938BEE577E730ADF06E9D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_70AB7B0176F08D47AC5DE730ADF07955" xlink:to="loc_us-gaap_OtherExpenseMember_746A5F899D5938BEE577E730ADF06E9D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanNameAxis" xlink:label="loc_us-gaap_RetirementPlanNameAxis_788DEAC4C97E6FE8EC4AE730ADF0355D" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_779B81F100FE299049D9E730ADF02F79" xlink:to="loc_us-gaap_RetirementPlanNameAxis_788DEAC4C97E6FE8EC4AE730ADF0355D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanNameDomain" xlink:label="loc_us-gaap_RetirementPlanNameDomain_5C6CBCC761012836251EE730ADF0EA67_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanNameAxis_788DEAC4C97E6FE8EC4AE730ADF0355D" xlink:to="loc_us-gaap_RetirementPlanNameDomain_5C6CBCC761012836251EE730ADF0EA67_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanNameDomain" xlink:label="loc_us-gaap_RetirementPlanNameDomain_5C6CBCC761012836251EE730ADF0EA67" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanNameAxis_788DEAC4C97E6FE8EC4AE730ADF0355D" xlink:to="loc_us-gaap_RetirementPlanNameDomain_5C6CBCC761012836251EE730ADF0EA67" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_U.S.PostretirementPlanOPEBMember" xlink:label="loc_spxc_U.S.PostretirementPlanOPEBMember_7C8EBF8D72BAD47EB212E730ADF01ECF" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanNameDomain_5C6CBCC761012836251EE730ADF0EA67" xlink:to="loc_spxc_U.S.PostretirementPlanOPEBMember_7C8EBF8D72BAD47EB212E730ADF01ECF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_E9025E343FF01AE1E7A1E730ADF227E2" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_779B81F100FE299049D9E730ADF02F79" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_E9025E343FF01AE1E7A1E730ADF227E2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_7BF7C22143C0A9FA1B9BE730ADF282CD_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_E9025E343FF01AE1E7A1E730ADF227E2" xlink:to="loc_us-gaap_EquityComponentDomain_7BF7C22143C0A9FA1B9BE730ADF282CD_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_7BF7C22143C0A9FA1B9BE730ADF282CD" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_E9025E343FF01AE1E7A1E730ADF227E2" xlink:to="loc_us-gaap_EquityComponentDomain_7BF7C22143C0A9FA1B9BE730ADF282CD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_E6708D0DDA8081FF0527E730ADF2C2D6" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_7BF7C22143C0A9FA1B9BE730ADF282CD" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_E6708D0DDA8081FF0527E730ADF2C2D6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_684895EED2BC30821985E730ADF2746C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_E6708D0DDA8081FF0527E730ADF2C2D6" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_684895EED2BC30821985E730ADF2746C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember" xlink:label="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_D35F424A79623FA58B43E730ADF344BD" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_E6708D0DDA8081FF0527E730ADF2C2D6" xlink:to="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_D35F424A79623FA58B43E730ADF344BD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_CC327D047CF760B2CD7EE730ADF3EE42" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_E6708D0DDA8081FF0527E730ADF2C2D6" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_CC327D047CF760B2CD7EE730ADF3EE42" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_EB9F62FDD44AFA7BBEA2E730ADF3AC5B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_8636470313BD0BDCADB5E730ADF3DB7B" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_EB9F62FDD44AFA7BBEA2E730ADF3AC5B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_4063680475B8A2F1C9B0E730ADF4AAE7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_EB9F62FDD44AFA7BBEA2E730ADF3AC5B" xlink:to="loc_us-gaap_StockholdersEquity_4063680475B8A2F1C9B0E730ADF4AAE7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_F59CA009AC6E44C0B967E730ADF4BC01" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_EB9F62FDD44AFA7BBEA2E730ADF3AC5B" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_F59CA009AC6E44C0B967E730ADF4BC01" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ReclassificationfromAccumulatedOtherComprehensiveIncomeInitialAdoptionof606" xlink:label="loc_spxc_ReclassificationfromAccumulatedOtherComprehensiveIncomeInitialAdoptionof606_5735D846322470435A9CE730ADF412C4" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_EB9F62FDD44AFA7BBEA2E730ADF3AC5B" xlink:to="loc_spxc_ReclassificationfromAccumulatedOtherComprehensiveIncomeInitialAdoptionof606_5735D846322470435A9CE730ADF412C4" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ReclassificationfromAccumulatedOtherComprehensiveIncomeStrandedTaxEffectsResultingfromtheTaxCutsandJobsAct" xlink:label="loc_spxc_ReclassificationfromAccumulatedOtherComprehensiveIncomeStrandedTaxEffectsResultingfromtheTaxCutsandJobsAct_D70B6775A7B9EDCEC613E730ADF4FB6A" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_EB9F62FDD44AFA7BBEA2E730ADF3AC5B" xlink:to="loc_spxc_ReclassificationfromAccumulatedOtherComprehensiveIncomeStrandedTaxEffectsResultingfromtheTaxCutsandJobsAct_D70B6775A7B9EDCEC613E730ADF4FB6A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_6932122B17BAA1D1E41BE730ADF40731" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_EB9F62FDD44AFA7BBEA2E730ADF3AC5B" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_6932122B17BAA1D1E41BE730ADF40731" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_C1D59DAD6A5D19AAF9DFE730ADF4A9FA" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_EB9F62FDD44AFA7BBEA2E730ADF3AC5B" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_C1D59DAD6A5D19AAF9DFE730ADF4A9FA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AociTaxAttributableToParent" xlink:label="loc_us-gaap_AociTaxAttributableToParent_D08AEDA65AFEB4D3007BE730ADF59CEC" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_8636470313BD0BDCADB5E730ADF3DB7B" xlink:to="loc_us-gaap_AociTaxAttributableToParent_D08AEDA65AFEB4D3007BE730ADF59CEC" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAmendments" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAmendments_E064356F8E5D28AB845FE730ADF50A5F" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_8636470313BD0BDCADB5E730ADF3DB7B" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAmendments_E064356F8E5D28AB845FE730ADF50A5F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeGainOnDerivative" xlink:label="loc_us-gaap_DerivativeGainOnDerivative_2D8E2C382D8E8E1E7E73E730ADF571D5" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_8636470313BD0BDCADB5E730ADF3DB7B" xlink:to="loc_us-gaap_DerivativeGainOnDerivative_2D8E2C382D8E8E1E7E73E730ADF571D5" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationCommonStockAndTreasuryStockDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfStockLineItems" xlink:label="loc_us-gaap_ClassOfStockLineItems_0AEA8341AD0C447A72F6623069EEDBEF" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_0BE860606A1CF2DA31E4623069E6104F" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_0AEA8341AD0C447A72F6623069EEDBEF" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_0BE860606A1CF2DA31E4623069E6104F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_DF12C428A2649E3425856214C895D1EC" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_0BE860606A1CF2DA31E4623069E6104F" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_DF12C428A2649E3425856214C895D1EC" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_4CA0A72782074C7124CF6214C8967D8D_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_DF12C428A2649E3425856214C895D1EC" xlink:to="loc_us-gaap_EquityComponentDomain_4CA0A72782074C7124CF6214C8967D8D_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_4CA0A72782074C7124CF6214C8967D8D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_DF12C428A2649E3425856214C895D1EC" xlink:to="loc_us-gaap_EquityComponentDomain_4CA0A72782074C7124CF6214C8967D8D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_F8D0ECE38B0366AFE98E6214C8969849" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4CA0A72782074C7124CF6214C8967D8D" xlink:to="loc_us-gaap_CommonStockMember_F8D0ECE38B0366AFE98E6214C8969849" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="loc_us-gaap_TreasuryStockMember_C6F40B2C41B212AE24BB6214C8964C31" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4CA0A72782074C7124CF6214C8967D8D" xlink:to="loc_us-gaap_TreasuryStockMember_C6F40B2C41B212AE24BB6214C8964C31" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_204663B28FDC5B8693076214C8964CB1" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4CA0A72782074C7124CF6214C8967D8D" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_204663B28FDC5B8693076214C8964CB1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_07CB030EC5C402650A186214C896DB85" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4CA0A72782074C7124CF6214C8967D8D" xlink:to="loc_us-gaap_RetainedEarningsMember_07CB030EC5C402650A186214C896DB85" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_A5B799DD49CB6C33FA006214C89744E3" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_0AEA8341AD0C447A72F6623069EEDBEF" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_A5B799DD49CB6C33FA006214C89744E3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_579BDFB509B60A789EE06214C8971827" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_0AEA8341AD0C447A72F6623069EEDBEF" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_579BDFB509B60A789EE06214C8971827" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SharesOutstandingRollForward" xlink:label="loc_spxc_SharesOutstandingRollForward_E865D3EA97235757BAEB6214C89746C4" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_0AEA8341AD0C447A72F6623069EEDBEF" xlink:to="loc_spxc_SharesOutstandingRollForward_E865D3EA97235757BAEB6214C89746C4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_93023E5EC18A881E4CA56214C897AECA" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_SharesOutstandingRollForward_E865D3EA97235757BAEB6214C89746C4" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_93023E5EC18A881E4CA56214C897AECA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_F1765A0684AA4FBF9E146214C89893CF" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_SharesOutstandingRollForward_E865D3EA97235757BAEB6214C89746C4" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_F1765A0684AA4FBF9E146214C89893CF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockSharesRetired" xlink:label="loc_us-gaap_TreasuryStockSharesRetired_1547ABF157CA77769C226214C8983EBE" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_SharesOutstandingRollForward_E865D3EA97235757BAEB6214C89746C4" xlink:to="loc_us-gaap_TreasuryStockSharesRetired_1547ABF157CA77769C226214C8983EBE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesOther" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesOther_83CB43F0FB38D87B57806214C898EC2D" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_SharesOutstandingRollForward_E865D3EA97235757BAEB6214C89746C4" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesOther_83CB43F0FB38D87B57806214C898EC2D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockRetiredParValueMethodAmount" xlink:label="loc_us-gaap_TreasuryStockRetiredParValueMethodAmount_BF948FD412D19F9CCC236214C8988062" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_SharesOutstandingRollForward_E865D3EA97235757BAEB6214C89746C4" xlink:to="loc_us-gaap_TreasuryStockRetiredParValueMethodAmount_BF948FD412D19F9CCC236214C8988062" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationCommonStockInTreasuryDividendsAndPreferredStockDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_16E73A01C7644430A866E23064613E63" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C7C68705F7FCB1569248E2306460A629" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_16E73A01C7644430A866E23064613E63" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C7C68705F7FCB1569248E2306460A629" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_D9C96A88670FEAE83689E23064600826" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C7C68705F7FCB1569248E2306460A629" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_D9C96A88670FEAE83689E23064600826" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_5BA39A9D4AEECD9DA2AAE230646042DA_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_D9C96A88670FEAE83689E23064600826" xlink:to="loc_us-gaap_EquityComponentDomain_5BA39A9D4AEECD9DA2AAE230646042DA_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_5BA39A9D4AEECD9DA2AAE230646042DA" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_D9C96A88670FEAE83689E23064600826" xlink:to="loc_us-gaap_EquityComponentDomain_5BA39A9D4AEECD9DA2AAE230646042DA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="loc_us-gaap_TreasuryStockMember_7FB6937D528428CC7179E2306461A06E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5BA39A9D4AEECD9DA2AAE230646042DA" xlink:to="loc_us-gaap_TreasuryStockMember_7FB6937D528428CC7179E2306461A06E" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_CommonStockInTreasuryAbstract" xlink:label="loc_spxc_CommonStockInTreasuryAbstract_97F677B0838EC34B1584E230646138FE" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_16E73A01C7644430A866E23064613E63" xlink:to="loc_spxc_CommonStockInTreasuryAbstract_97F677B0838EC34B1584E230646138FE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockSharesRetired" xlink:label="loc_us-gaap_TreasuryStockSharesRetired_627A70E84D65BCDAC62AE230646109A7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_CommonStockInTreasuryAbstract_97F677B0838EC34B1584E230646138FE" xlink:to="loc_us-gaap_TreasuryStockSharesRetired_627A70E84D65BCDAC62AE230646109A7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockRetiredParValueMethodAmount" xlink:label="loc_us-gaap_TreasuryStockRetiredParValueMethodAmount_A89D43D9703AD457B52AE23064610FC2" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_CommonStockInTreasuryAbstract_97F677B0838EC34B1584E230646138FE" xlink:to="loc_us-gaap_TreasuryStockRetiredParValueMethodAmount_A89D43D9703AD457B52AE23064610FC2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_F0F8728ACD1F6B478CE5E2306462D395" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_CommonStockInTreasuryAbstract_97F677B0838EC34B1584E230646138FE" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_F0F8728ACD1F6B478CE5E2306462D395" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:label="loc_us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract_9A31A9157CCDF1B4E541E23064621C2A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_16E73A01C7644430A866E23064613E63" xlink:to="loc_us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract_9A31A9157CCDF1B4E541E23064621C2A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_D1CFE8F42D7613E43C98E2306462D655" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract_9A31A9157CCDF1B4E541E23064621C2A" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_D1CFE8F42D7613E43C98E2306462D655" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_196E12C37BFF1CFE4ED1E2306462C2EA" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract_9A31A9157CCDF1B4E541E23064621C2A" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_196E12C37BFF1CFE4ED1E2306462C2EA" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationIncomeLossPerShareDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_898AC1CE92DC54897DB9E3ED7FC93AC1" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_33A8115837EFC5EBEA79E3ED7FC70559" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_898AC1CE92DC54897DB9E3ED7FC93AC1" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_33A8115837EFC5EBEA79E3ED7FC70559" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_C48CAB4E6FB5919E4894E3ED7FC7DE84" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_33A8115837EFC5EBEA79E3ED7FC70559" xlink:to="loc_us-gaap_AwardTypeAxis_C48CAB4E6FB5919E4894E3ED7FC7DE84" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A8C4110B1696B0088B53E3ED7FC8A2BE_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_C48CAB4E6FB5919E4894E3ED7FC7DE84" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A8C4110B1696B0088B53E3ED7FC8A2BE_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_C48CAB4E6FB5919E4894E3ED7FC7DE84" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A8C4110B1696B0088B53E3ED7FC8A2BE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_D5DCC669127BB909029DE3ED7FC89127" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A8C4110B1696B0088B53E3ED7FC8A2BE" xlink:to="loc_us-gaap_EmployeeStockOptionMember_D5DCC669127BB909029DE3ED7FC89127" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_F8D9F244A1F45313140AE3ED7FC83B2A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_33A8115837EFC5EBEA79E3ED7FC70559" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_F8D9F244A1F45313140AE3ED7FC83B2A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_DCC6F3E25FF1F1A9A7E7E3ED7FC9C656_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_F8D9F244A1F45313140AE3ED7FC83B2A" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_DCC6F3E25FF1F1A9A7E7E3ED7FC9C656_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_F8D9F244A1F45313140AE3ED7FC83B2A" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_DCC6F3E25FF1F1A9A7E7E3ED7FC9C656" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_UnvestedRestrictedStockAndRestrictedStockUnitsthatdidnotMeetRequiredMarketThresholdsforVestingMember" xlink:label="loc_spxc_UnvestedRestrictedStockAndRestrictedStockUnitsthatdidnotMeetRequiredMarketThresholdsforVestingMember_4B1DB88A319506B45F59E3ED7FC969F8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_DCC6F3E25FF1F1A9A7E7E3ED7FC9C656" xlink:to="loc_spxc_UnvestedRestrictedStockAndRestrictedStockUnitsthatdidnotMeetRequiredMarketThresholdsforVestingMember_4B1DB88A319506B45F59E3ED7FC969F8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract" xlink:label="loc_us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract_B669283CFD25EA4956F2E3ED7FC9536B" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_898AC1CE92DC54897DB9E3ED7FC93AC1" xlink:to="loc_us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract_B669283CFD25EA4956F2E3ED7FC9536B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_20602A653DD67D6B77A6E3ED7FCA81C1" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract_B669283CFD25EA4956F2E3ED7FC9536B" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_20602A653DD67D6B77A6E3ED7FCA81C1" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity_1AA32187C606913EDEF0E3ED7FCADC0F" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract_B669283CFD25EA4956F2E3ED7FC9536B" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity_1AA32187C606913EDEF0E3ED7FCADC0F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockDividendsAndOtherAdjustments" xlink:label="loc_us-gaap_PreferredStockDividendsAndOtherAdjustments_0297510A5507344B267EE3ED7FCA088E" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract_B669283CFD25EA4956F2E3ED7FC9536B" xlink:to="loc_us-gaap_PreferredStockDividendsAndOtherAdjustments_0297510A5507344B267EE3ED7FCA088E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperations_F949226555B078F76A0AE3ED7FCBE940" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract_B669283CFD25EA4956F2E3ED7FC9536B" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperations_F949226555B078F76A0AE3ED7FCBE940" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_38F989F826FA5544DCE0E3ED7FCBD56A" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract_B669283CFD25EA4956F2E3ED7FC9536B" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_38F989F826FA5544DCE0E3ED7FCBD56A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest_165D133EA149FA90B552E3ED7FCBE630" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract_B669283CFD25EA4956F2E3ED7FC9536B" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest_165D133EA149FA90B552E3ED7FCBE630" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_7B8B2701C4BE094E0555E3ED7FCB804A" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract_B669283CFD25EA4956F2E3ED7FC9536B" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_7B8B2701C4BE094E0555E3ED7FCB804A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_1F1104BC6DE2B85F050EE3ED7FCBB701" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_898AC1CE92DC54897DB9E3ED7FC93AC1" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_1F1104BC6DE2B85F050EE3ED7FCBB701" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_79B7B682E0B3EC72F9EDE3ED7FCC2032" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_1F1104BC6DE2B85F050EE3ED7FCBB701" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_79B7B682E0B3EC72F9EDE3ED7FCC2032" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_4D2A9B317A8B199D669DE3ED7FCC0D12" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_1F1104BC6DE2B85F050EE3ED7FCBB701" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_4D2A9B317A8B199D669DE3ED7FCC0D12" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_7BEE4221A6691BCFBA54E3ED7FCD9DA0" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_1F1104BC6DE2B85F050EE3ED7FCBB701" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_7BEE4221A6691BCFBA54E3ED7FCD9DA0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_8B55A3F7F43012939E91E3ED7FCDF410" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_898AC1CE92DC54897DB9E3ED7FC93AC1" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_8B55A3F7F43012939E91E3ED7FCDF410" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationLongTermIncentiveCompensationDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CF143B60451C1B72BD7DE23064B86CFF" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D1F48CAE6BC0BB35C0A1E23064B29377" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CF143B60451C1B72BD7DE23064B86CFF" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D1F48CAE6BC0BB35C0A1E23064B29377" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_0213E06D08E06B5C7829E23064B2C136" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D1F48CAE6BC0BB35C0A1E23064B29377" xlink:to="loc_us-gaap_AwardTypeAxis_0213E06D08E06B5C7829E23064B2C136" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A0F73A7C4DB42508E828E23064B3328F_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_0213E06D08E06B5C7829E23064B2C136" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A0F73A7C4DB42508E828E23064B3328F_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A0F73A7C4DB42508E828E23064B3328F" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_0213E06D08E06B5C7829E23064B2C136" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A0F73A7C4DB42508E828E23064B3328F" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_PerformanceSharesRestrictedStockRestrictedStockUnitsandEmployeeStockOptionMember" xlink:label="loc_spxc_PerformanceSharesRestrictedStockRestrictedStockUnitsandEmployeeStockOptionMember_CC7BB12EF75653BCC558E23064B35A10" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A0F73A7C4DB42508E828E23064B3328F" xlink:to="loc_spxc_PerformanceSharesRestrictedStockRestrictedStockUnitsandEmployeeStockOptionMember_CC7BB12EF75653BCC558E23064B35A10" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_PerformanceSharesRestrictedStockandRestrictedStockUnitsMember" xlink:label="loc_spxc_PerformanceSharesRestrictedStockandRestrictedStockUnitsMember_C3858B832443B063B653E23064B301D1" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_PerformanceSharesRestrictedStockRestrictedStockUnitsandEmployeeStockOptionMember_CC7BB12EF75653BCC558E23064B35A10" xlink:to="loc_spxc_PerformanceSharesRestrictedStockandRestrictedStockUnitsMember_C3858B832443B063B653E23064B301D1" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_RestrictedStockAndRestrictedStockUnitsMember" xlink:label="loc_spxc_RestrictedStockAndRestrictedStockUnitsMember_F57E79D4D54831F547AEE23064B3EA79" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_PerformanceSharesRestrictedStockandRestrictedStockUnitsMember_C3858B832443B063B653E23064B301D1" xlink:to="loc_spxc_RestrictedStockAndRestrictedStockUnitsMember_F57E79D4D54831F547AEE23064B3EA79" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PerformanceSharesMember" xlink:label="loc_us-gaap_PerformanceSharesMember_9E0E1011708F8BACF78EE23064B403F5" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_PerformanceSharesRestrictedStockandRestrictedStockUnitsMember_C3858B832443B063B653E23064B301D1" xlink:to="loc_us-gaap_PerformanceSharesMember_9E0E1011708F8BACF78EE23064B403F5" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_LongTermCashAwardsMember" xlink:label="loc_spxc_LongTermCashAwardsMember_5CC26FFDB131470E312CE23064B46A58" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_A0F73A7C4DB42508E828E23064B3328F" xlink:to="loc_spxc_LongTermCashAwardsMember_5CC26FFDB131470E312CE23064B46A58" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_D3477480633623A2D3A1E23064B408EB" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D1F48CAE6BC0BB35C0A1E23064B29377" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_D3477480633623A2D3A1E23064B408EB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_FEE461CB938B237C29A0E23064B462BD_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_D3477480633623A2D3A1E23064B408EB" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_FEE461CB938B237C29A0E23064B462BD_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_FEE461CB938B237C29A0E23064B462BD" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_D3477480633623A2D3A1E23064B408EB" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_FEE461CB938B237C29A0E23064B462BD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember_D2D1CD613B190BC24127E23064B4491E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_FEE461CB938B237C29A0E23064B462BD" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember_D2D1CD613B190BC24127E23064B4491E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_E6F9315E4ABBAB958DFCE23064B5E758" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D1F48CAE6BC0BB35C0A1E23064B29377" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_E6F9315E4ABBAB958DFCE23064B5E758" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_716E91DB506A8E86BDA1E23064B51670_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_E6F9315E4ABBAB958DFCE23064B5E758" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_716E91DB506A8E86BDA1E23064B51670_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_716E91DB506A8E86BDA1E23064B51670" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_E6F9315E4ABBAB958DFCE23064B5E758" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_716E91DB506A8E86BDA1E23064B51670" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SPXFlowIncMember" xlink:label="loc_spxc_SPXFlowIncMember_A544391BE57B68C1DEC1E23064B5B5B9" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_716E91DB506A8E86BDA1E23064B51670" xlink:to="loc_spxc_SPXFlowIncMember_A544391BE57B68C1DEC1E23064B5B5B9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_4F78A60A01969A264133E23064B54C82" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D1F48CAE6BC0BB35C0A1E23064B29377" xlink:to="loc_srt_RangeAxis_4F78A60A01969A264133E23064B54C82" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_3ACB04F6A55520AAF036E23064B6EA4D_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_4F78A60A01969A264133E23064B54C82" xlink:to="loc_srt_RangeMember_3ACB04F6A55520AAF036E23064B6EA4D_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_3ACB04F6A55520AAF036E23064B6EA4D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_4F78A60A01969A264133E23064B54C82" xlink:to="loc_srt_RangeMember_3ACB04F6A55520AAF036E23064B6EA4D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_17799345EEE8F139E696E23064B64410" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_3ACB04F6A55520AAF036E23064B6EA4D" xlink:to="loc_srt_MaximumMember_17799345EEE8F139E696E23064B64410" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_77B95074BB9CECBBDD45E23064B6E4D7" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_3ACB04F6A55520AAF036E23064B6EA4D" xlink:to="loc_srt_MinimumMember_77B95074BB9CECBBDD45E23064B6E4D7" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_IndexTypeAxis" xlink:label="loc_spxc_IndexTypeAxis_92B575095BBAC3FED4F7E23064B6C61E" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D1F48CAE6BC0BB35C0A1E23064B29377" xlink:to="loc_spxc_IndexTypeAxis_92B575095BBAC3FED4F7E23064B6C61E" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_IndexTypeDomain" xlink:label="loc_spxc_IndexTypeDomain_30DBBCFE55C20C7EB375E23064B62155_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_spxc_IndexTypeAxis_92B575095BBAC3FED4F7E23064B6C61E" xlink:to="loc_spxc_IndexTypeDomain_30DBBCFE55C20C7EB375E23064B62155_default" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_IndexTypeDomain" xlink:label="loc_spxc_IndexTypeDomain_30DBBCFE55C20C7EB375E23064B62155" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_spxc_IndexTypeAxis_92B575095BBAC3FED4F7E23064B6C61E" xlink:to="loc_spxc_IndexTypeDomain_30DBBCFE55C20C7EB375E23064B62155" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SP600CapitalGoodsIndexMember" xlink:label="loc_spxc_SP600CapitalGoodsIndexMember_DA8FD2AC76B816693D20E23064B7381D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_spxc_IndexTypeDomain_30DBBCFE55C20C7EB375E23064B62155" xlink:to="loc_spxc_SP600CapitalGoodsIndexMember_DA8FD2AC76B816693D20E23064B7381D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_398541CB964D9672FFADE23064B779D6" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D1F48CAE6BC0BB35C0A1E23064B29377" xlink:to="loc_us-gaap_PlanNameAxis_398541CB964D9672FFADE23064B779D6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_AEE48C00AB67623681B3E23064B75B15_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_398541CB964D9672FFADE23064B779D6" xlink:to="loc_us-gaap_PlanNameDomain_AEE48C00AB67623681B3E23064B75B15_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_398541CB964D9672FFADE23064B779D6" xlink:to="loc_us-gaap_PlanNameDomain_AEE48C00AB67623681B3E23064B75B15" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_StockCompensationPlan2002Member" xlink:label="loc_spxc_StockCompensationPlan2002Member_512E88EA00573C856C11E23064B766AD" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_AEE48C00AB67623681B3E23064B75B15" xlink:to="loc_spxc_StockCompensationPlan2002Member_512E88EA00573C856C11E23064B766AD" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_NonEmployeeDirectorIncentivePlanMember" xlink:label="loc_spxc_NonEmployeeDirectorIncentivePlanMember_22487BA8C9E664601A74E23064B8BEF3" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_AEE48C00AB67623681B3E23064B75B15" xlink:to="loc_spxc_NonEmployeeDirectorIncentivePlanMember_22487BA8C9E664601A74E23064B8BEF3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationAbstract" xlink:label="loc_us-gaap_ShareBasedCompensationAbstract_D0E98D6318A2EED2F67BE23064B88299" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CF143B60451C1B72BD7DE23064B86CFF" xlink:to="loc_us-gaap_ShareBasedCompensationAbstract_D0E98D6318A2EED2F67BE23064B88299" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_B1CC5822A6C5F91DC20CE23064B8DC95" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationAbstract_D0E98D6318A2EED2F67BE23064B88299" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_B1CC5822A6C5F91DC20CE23064B8DC95" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantIncreaseDecrease" xlink:label="loc_spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantIncreaseDecrease_72DB667ABB709BE50A46E23064B9E818" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationAbstract_D0E98D6318A2EED2F67BE23064B88299" xlink:to="loc_spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantIncreaseDecrease_72DB667ABB709BE50A46E23064B9E818" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_D4D021C415E8BDD2E5C6E23064B9C241" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationAbstract_D0E98D6318A2EED2F67BE23064B88299" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_D4D021C415E8BDD2E5C6E23064B9C241" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_FFCBCE43500C849EC3CAE23064B97BDF" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationAbstract_D0E98D6318A2EED2F67BE23064B88299" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_FFCBCE43500C849EC3CAE23064B97BDF" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAmortizationPeriod" xlink:label="loc_spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAmortizationPeriod_8FB11E6CC8BB0F50865BE23064B93702" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationAbstract_D0E98D6318A2EED2F67BE23064B88299" xlink:to="loc_spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAmortizationPeriod_8FB11E6CC8BB0F50865BE23064B93702" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_6013584104C7AFEEC832E23064BA5BE7" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationAbstract_D0E98D6318A2EED2F67BE23064B88299" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_6013584104C7AFEEC832E23064BA5BE7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_1D126A401518A28D2804E23064BAB892" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationAbstract_D0E98D6318A2EED2F67BE23064B88299" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_1D126A401518A28D2804E23064BAB892" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_7AE795197219B64C0148E23064BA2E10" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CF143B60451C1B72BD7DE23064B86CFF" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_7AE795197219B64C0148E23064BA2E10" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_0E8BDD48A6D5F778EF52E23064BA96DD" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_7AE795197219B64C0148E23064BA2E10" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_0E8BDD48A6D5F778EF52E23064BA96DD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_1F0B4F60067B2E90DDCAE23064BA5499" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_7AE795197219B64C0148E23064BA2E10" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_1F0B4F60067B2E90DDCAE23064BA5499" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_EFAF56BBDF09B90208A3E23064BB7772" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_7AE795197219B64C0148E23064BA2E10" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_EFAF56BBDF09B90208A3E23064BB7772" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsTotalShareholderReturnCorrelation" xlink:label="loc_spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsTotalShareholderReturnCorrelation_3B4E650A0701EE51BB63E23064BB9008" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_7AE795197219B64C0148E23064BA2E10" xlink:to="loc_spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsTotalShareholderReturnCorrelation_3B4E650A0701EE51BB63E23064BB9008" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityPeriodBasedOnHistoricalVolatility" xlink:label="loc_spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityPeriodBasedOnHistoricalVolatility_EF0EB8201395DEC9CE81E23064BBB8FF" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_7AE795197219B64C0148E23064BA2E10" xlink:to="loc_spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityPeriodBasedOnHistoricalVolatility_EF0EB8201395DEC9CE81E23064BBB8FF" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateCalculationPeriod" xlink:label="loc_spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateCalculationPeriod_3AD437609C60598E2BA2E23064BB325E" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_7AE795197219B64C0148E23064BA2E10" xlink:to="loc_spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateCalculationPeriod_3AD437609C60598E2BA2E23064BB325E" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationStockActivityDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_A78BFBB145FEB7C5C64ADF574324B8CC" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_009F8AE62E1A0245FC2DDF5743216847" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_A78BFBB145FEB7C5C64ADF574324B8CC" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_009F8AE62E1A0245FC2DDF5743216847" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_8B71260C69A1C9F7B34DDF5743228A06" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_009F8AE62E1A0245FC2DDF5743216847" xlink:to="loc_us-gaap_AwardTypeAxis_8B71260C69A1C9F7B34DDF5743228A06" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E8FCBAC0289B662D1792DF5743221BCE_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_8B71260C69A1C9F7B34DDF5743228A06" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E8FCBAC0289B662D1792DF5743221BCE_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E8FCBAC0289B662D1792DF5743221BCE" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_8B71260C69A1C9F7B34DDF5743228A06" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E8FCBAC0289B662D1792DF5743221BCE" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_PerformanceSharesRestrictedStockandRestrictedStockUnitsMember" xlink:label="loc_spxc_PerformanceSharesRestrictedStockandRestrictedStockUnitsMember_3AFD9DBA23986533D75ADF5743225903" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E8FCBAC0289B662D1792DF5743221BCE" xlink:to="loc_spxc_PerformanceSharesRestrictedStockandRestrictedStockUnitsMember_3AFD9DBA23986533D75ADF5743225903" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_FF1447C4EAAF119DA886DF574323C90A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E8FCBAC0289B662D1792DF5743221BCE" xlink:to="loc_us-gaap_EmployeeStockOptionMember_FF1447C4EAAF119DA886DF574323C90A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_D8842CBFFAFBDCAD1D0ADF574323992A" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_009F8AE62E1A0245FC2DDF5743216847" xlink:to="loc_srt_RangeAxis_D8842CBFFAFBDCAD1D0ADF574323992A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_4060E2936AC52CD3CECBDF5743239F2D_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_D8842CBFFAFBDCAD1D0ADF574323992A" xlink:to="loc_srt_RangeMember_4060E2936AC52CD3CECBDF5743239F2D_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_4060E2936AC52CD3CECBDF5743239F2D" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_D8842CBFFAFBDCAD1D0ADF574323992A" xlink:to="loc_srt_RangeMember_4060E2936AC52CD3CECBDF5743239F2D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_WeightedAverageMember" xlink:label="loc_srt_WeightedAverageMember_5D0701FE7F23F639990ADF574323C9E8" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_4060E2936AC52CD3CECBDF5743239F2D" xlink:to="loc_srt_WeightedAverageMember_5D0701FE7F23F639990ADF574323C9E8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_D17788FE717A6739A4D5DF5743232E4E" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_4060E2936AC52CD3CECBDF5743239F2D" xlink:to="loc_srt_MaximumMember_D17788FE717A6739A4D5DF5743232E4E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_2C0C36AA0E8C7EC99CF4DF574324A246" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_4060E2936AC52CD3CECBDF5743239F2D" xlink:to="loc_srt_MinimumMember_2C0C36AA0E8C7EC99CF4DF574324A246" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_F025F0E2844FD4C6F806DF5743247D17" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_A78BFBB145FEB7C5C64ADF574324B8CC" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_F025F0E2844FD4C6F806DF5743247D17" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_0518BF135EA887BA35CDDF57432431E5" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_F025F0E2844FD4C6F806DF5743247D17" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_0518BF135EA887BA35CDDF57432431E5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_D945B5450A13ED5B4F3CDF57432515BA" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_F025F0E2844FD4C6F806DF5743247D17" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_D945B5450A13ED5B4F3CDF57432515BA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_F0F5C5286457D45B1999DF5743258E17" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_F025F0E2844FD4C6F806DF5743247D17" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_F0F5C5286457D45B1999DF5743258E17" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_DAF1C92AE3F7A3D4F97BDF574325612B" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_F025F0E2844FD4C6F806DF5743247D17" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_DAF1C92AE3F7A3D4F97BDF574325612B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_BD3A08C8433DC29945EBDF5743254CCE" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_A78BFBB145FEB7C5C64ADF574324B8CC" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_BD3A08C8433DC29945EBDF5743254CCE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_0C14C928115BDE1C2CEADF574325C4FD" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_BD3A08C8433DC29945EBDF5743254CCE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_0C14C928115BDE1C2CEADF574325C4FD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_B2EC3DFD98FD37CE5D76DF5743262880" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_BD3A08C8433DC29945EBDF5743254CCE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_B2EC3DFD98FD37CE5D76DF5743262880" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_2A278F9D2267CB9DD90DDF57432624CD" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_BD3A08C8433DC29945EBDF5743254CCE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_2A278F9D2267CB9DD90DDF57432624CD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_3F990831CCDDEF76746DDF574326AB1B" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_BD3A08C8433DC29945EBDF5743254CCE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_3F990831CCDDEF76746DDF574326AB1B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CompensationRelatedCostsAbstract" xlink:label="loc_us-gaap_CompensationRelatedCostsAbstract_8F3318EFE236E23E8E5ADF5743262C2D" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_A78BFBB145FEB7C5C64ADF574324B8CC" xlink:to="loc_us-gaap_CompensationRelatedCostsAbstract_8F3318EFE236E23E8E5ADF5743262C2D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_2FEB5E40AA79D29A9F88DF5743270991" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CompensationRelatedCostsAbstract_8F3318EFE236E23E8E5ADF5743262C2D" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_2FEB5E40AA79D29A9F88DF5743270991" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_BE4270D221EFE41CBEB7DF574327CE99" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CompensationRelatedCostsAbstract_8F3318EFE236E23E8E5ADF5743262C2D" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_BE4270D221EFE41CBEB7DF574327CE99" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_9848A1374DA4B80ABD63DF574327AC1B" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CompensationRelatedCostsAbstract_8F3318EFE236E23E8E5ADF5743262C2D" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_9848A1374DA4B80ABD63DF574327AC1B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_E5ECCB072582173B2935DF57432742D8" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_A78BFBB145FEB7C5C64ADF574324B8CC" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_E5ECCB072582173B2935DF57432742D8" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_0937E1F8BFADC3C83D70DF5743287005" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_E5ECCB072582173B2935DF57432742D8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_0937E1F8BFADC3C83D70DF5743287005" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_E0CFBA21E71140543349DF574328FC2B" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_E5ECCB072582173B2935DF57432742D8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_E0CFBA21E71140543349DF574328FC2B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_97665631FE9B7F21DE6ADF574328BCA5" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_E5ECCB072582173B2935DF57432742D8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_97665631FE9B7F21DE6ADF574328BCA5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_D06FD4828739C06BF1D3DF574328F745" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_E5ECCB072582173B2935DF57432742D8" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_D06FD4828739C06BF1D3DF574328F745" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_02BA097E6D5AA3E458D7DF5743284252" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_E5ECCB072582173B2935DF57432742D8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_02BA097E6D5AA3E458D7DF5743284252" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_55BD3E7ED866D6AB27CBDF5743280E09" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_E5ECCB072582173B2935DF57432742D8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_55BD3E7ED866D6AB27CBDF5743280E09" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_67FDE46A2395B58C6FCFDF574329E8C4" xlink:type="locator"/>

<link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_E5ECCB072582173B2935DF57432742D8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_67FDE46A2395B58C6FCFDF574329E8C4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_DCC6D458F40C5D1E0B42DF574329DF09" xlink:type="locator"/>

<link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_E5ECCB072582173B2935DF57432742D8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_DCC6D458F40C5D1E0B42DF574329DF09" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_82BB844EFC1D5B61CC24DF574329276A" xlink:type="locator"/>

<link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_E5ECCB072582173B2935DF57432742D8" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_82BB844EFC1D5B61CC24DF574329276A" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityPeriodBasedOnHistoricalVolatility" xlink:label="loc_spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityPeriodBasedOnHistoricalVolatility_A67DE66D110093F67068DF5743294033" xlink:type="locator"/>

<link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_E5ECCB072582173B2935DF57432742D8" xlink:to="loc_spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityPeriodBasedOnHistoricalVolatility_A67DE66D110093F67068DF5743294033" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateCalculationPeriod" xlink:label="loc_spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateCalculationPeriod_92D883ED08EFB665D5D4DF574329C21A" xlink:type="locator"/>

<link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_E5ECCB072582173B2935DF57432742D8" xlink:to="loc_spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateCalculationPeriod_92D883ED08EFB665D5D4DF574329C21A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_2036A080194CC0FB066FDF57432971AA" xlink:type="locator"/>

<link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_E5ECCB072582173B2935DF57432742D8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_2036A080194CC0FB066FDF57432971AA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_3315FB4E150EB7F9CECDDF57432A82D3" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_A78BFBB145FEB7C5C64ADF574324B8CC" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_3315FB4E150EB7F9CECDDF57432A82D3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_73C03F64021B1B8F9B58DF86286FF202" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_3315FB4E150EB7F9CECDDF57432A82D3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_73C03F64021B1B8F9B58DF86286FF202" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_3280E46D0B4471869053DF57432AB098" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_3315FB4E150EB7F9CECDDF57432A82D3" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_3280E46D0B4471869053DF57432AB098" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_B50584269124C4E24E56DF57432A02DE" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_3315FB4E150EB7F9CECDDF57432A82D3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_B50584269124C4E24E56DF57432A02DE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_A03F43CBB2A068084A28DF57432BCFE4" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_A78BFBB145FEB7C5C64ADF574324B8CC" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_A03F43CBB2A068084A28DF57432BCFE4" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_360F986417CEE55C1069DF89E2AE943A" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_A03F43CBB2A068084A28DF57432BCFE4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_360F986417CEE55C1069DF89E2AE943A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_74A8E038EAFB98BA83FFDF57432B8229" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_A03F43CBB2A068084A28DF57432BCFE4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_74A8E038EAFB98BA83FFDF57432B8229" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_B03CB6BE396C001D969CDF57432B84DB" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_A03F43CBB2A068084A28DF57432BCFE4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_B03CB6BE396C001D969CDF57432B84DB" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationSummaryOfReclassifiedComponentsOfAociDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_5A1BFBA0F38F5B8FC77EE246682B111D" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_4C4EC544804B15313538E246681E0F68" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_5A1BFBA0F38F5B8FC77EE246682B111D" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_4C4EC544804B15313538E246681E0F68" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_95A62C57959566738B7FE246681F205C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_4C4EC544804B15313538E246681E0F68" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_95A62C57959566738B7FE246681F205C" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_645F181D93B290B42A20E2466820C2BB_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_95A62C57959566738B7FE246681F205C" xlink:to="loc_us-gaap_EquityComponentDomain_645F181D93B290B42A20E2466820C2BB_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_645F181D93B290B42A20E2466820C2BB" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_95A62C57959566738B7FE246681F205C" xlink:to="loc_us-gaap_EquityComponentDomain_645F181D93B290B42A20E2466820C2BB" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember" xlink:label="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_AFF338A3DD9674458645E246682558B2" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_645F181D93B290B42A20E2466820C2BB" xlink:to="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_AFF338A3DD9674458645E246682558B2" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_2B9C57ED4428C8329461E2466826C083" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_645F181D93B290B42A20E2466820C2BB" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_2B9C57ED4428C8329461E2466826C083" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_9CF50B0271573F7AC9EBE2466826D256" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_4C4EC544804B15313538E246681E0F68" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_9CF50B0271573F7AC9EBE2466826D256" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_4748FFBE0A2CD224040AE24668276DA6_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_9CF50B0271573F7AC9EBE2466826D256" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_4748FFBE0A2CD224040AE24668276DA6_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_4748FFBE0A2CD224040AE24668276DA6" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_9CF50B0271573F7AC9EBE2466826D256" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_4748FFBE0A2CD224040AE24668276DA6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_313E4D8232FC8930EE65E24668279990" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_4748FFBE0A2CD224040AE24668276DA6" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_313E4D8232FC8930EE65E24668279990" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommodityContractMember" xlink:label="loc_us-gaap_CommodityContractMember_BDD8D9B5FA7C903752A7E246682A6962" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_4748FFBE0A2CD224040AE24668276DA6" xlink:to="loc_us-gaap_CommodityContractMember_BDD8D9B5FA7C903752A7E246682A6962" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestRateSwapMember" xlink:label="loc_us-gaap_InterestRateSwapMember_F8F9F3E3AC511C874DD3E246682A4BB6" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_4748FFBE0A2CD224040AE24668276DA6" xlink:to="loc_us-gaap_InterestRateSwapMember_F8F9F3E3AC511C874DD3E246682A4BB6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_9990AF65436256D84B5AE246682B7C58" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_4C4EC544804B15313538E246681E0F68" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_9990AF65436256D84B5AE246682B7C58" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_E37EC379A47E19C81CD0E246682B1E20_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_9990AF65436256D84B5AE246682B7C58" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_E37EC379A47E19C81CD0E246682B1E20_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_E37EC379A47E19C81CD0E246682B1E20" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_9990AF65436256D84B5AE246682B7C58" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_E37EC379A47E19C81CD0E246682B1E20" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_D587679507460D5F53AFE246682B9B09" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_E37EC379A47E19C81CD0E246682B1E20" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_D587679507460D5F53AFE246682B9B09" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_6C5ECBAD63BAFB9A669CE246682CDF95" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_5A1BFBA0F38F5B8FC77EE246682B111D" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_6C5ECBAD63BAFB9A669CE246682CDF95" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_675040566C706059F1ECE246682C608F" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_5A1BFBA0F38F5B8FC77EE246682B111D" xlink:to="loc_us-gaap_InterestExpense_675040566C706059F1ECE246682C608F" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_0A4D508A61448AE99ABCE246682C98CA" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_5A1BFBA0F38F5B8FC77EE246682B111D" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_0A4D508A61448AE99ABCE246682C98CA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_A3F81B805FAD60820A69E246682CBFD0" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_5A1BFBA0F38F5B8FC77EE246682B111D" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_A3F81B805FAD60820A69E246682CBFD0" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_C734A1CC8F5C8B579559E246682D7B5E" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_5A1BFBA0F38F5B8FC77EE246682B111D" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_C734A1CC8F5C8B579559E246682D7B5E" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_C6BCE7598B1523650DD8E246682D0E01" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_5A1BFBA0F38F5B8FC77EE246682B111D" xlink:to="loc_us-gaap_NetIncomeLoss_C6BCE7598B1523650DD8E246682D0E01" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/ShareholdersEquityAndLongTermIncentiveCompensationTables" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/SpecialChargesNet" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/SpecialChargesNetDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_E5B7DA202C7DDA066CB1C869458D53E0" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1F53F48B4B2D91E3CFE4C86945842E08" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_E5B7DA202C7DDA066CB1C869458D53E0" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1F53F48B4B2D91E3CFE4C86945842E08" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_1F76DA7AFE521D5E3BE9C869458465F6" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1F53F48B4B2D91E3CFE4C86945842E08" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_1F76DA7AFE521D5E3BE9C869458465F6" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_2BEDA835448A1B6CB746C86945858840_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_1F76DA7AFE521D5E3BE9C869458465F6" xlink:to="loc_us-gaap_SegmentDomain_2BEDA835448A1B6CB746C86945858840_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_2BEDA835448A1B6CB746C86945858840" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_1F76DA7AFE521D5E3BE9C869458465F6" xlink:to="loc_us-gaap_SegmentDomain_2BEDA835448A1B6CB746C86945858840" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_HVACReportableSegmentMember" xlink:label="loc_spxc_HVACReportableSegmentMember_0BC66001824AB4627AB0C869458656ED" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2BEDA835448A1B6CB746C86945858840" xlink:to="loc_spxc_HVACReportableSegmentMember_0BC66001824AB4627AB0C869458656ED" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_DetectionandMeasurementReportableSegmentMember" xlink:label="loc_spxc_DetectionandMeasurementReportableSegmentMember_E409EC0559CB323363E3C86945870415" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2BEDA835448A1B6CB746C86945858840" xlink:to="loc_spxc_DetectionandMeasurementReportableSegmentMember_E409EC0559CB323363E3C86945870415" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_EngineeredSolutionsReportableSegmentMember" xlink:label="loc_spxc_EngineeredSolutionsReportableSegmentMember_000B9D734FB4844D9E09C8694587D99A" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2BEDA835448A1B6CB746C86945858840" xlink:to="loc_spxc_EngineeredSolutionsReportableSegmentMember_000B9D734FB4844D9E09C8694587D99A" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllOtherSegmentsMember" xlink:label="loc_us-gaap_AllOtherSegmentsMember_72BD9BA426BD1D442E42C869458726E9" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2BEDA835448A1B6CB746C86945858840" xlink:to="loc_us-gaap_AllOtherSegmentsMember_72BD9BA426BD1D442E42C869458726E9" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="loc_us-gaap_SubsegmentsAxis_9A6DA6CFEB9C0D4C3D90C8694587E556" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1F53F48B4B2D91E3CFE4C86945842E08" xlink:to="loc_us-gaap_SubsegmentsAxis_9A6DA6CFEB9C0D4C3D90C8694587E556" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_4A21487A707FDFA7B210C8694588B1CD_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_9A6DA6CFEB9C0D4C3D90C8694587E556" xlink:to="loc_us-gaap_SubsegmentsDomain_4A21487A707FDFA7B210C8694588B1CD_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsegmentsDomain" xlink:label="loc_us-gaap_SubsegmentsDomain_4A21487A707FDFA7B210C8694588B1CD" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_9A6DA6CFEB9C0D4C3D90C8694587E556" xlink:to="loc_us-gaap_SubsegmentsDomain_4A21487A707FDFA7B210C8694588B1CD" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SPXHeatTransferBusinessMember" xlink:label="loc_spxc_SPXHeatTransferBusinessMember_297CB376B1B72011C32CC86945886982" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_4A21487A707FDFA7B210C8694588B1CD" xlink:to="loc_spxc_SPXHeatTransferBusinessMember_297CB376B1B72011C32CC86945886982" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsAxis" xlink:label="loc_srt_ConsolidationItemsAxis_0F58D4EDC12AD0CC5C19C86945896322" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1F53F48B4B2D91E3CFE4C86945842E08" xlink:to="loc_srt_ConsolidationItemsAxis_0F58D4EDC12AD0CC5C19C86945896322" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_724622F48799DA7EBC3EC869458A7982_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_0F58D4EDC12AD0CC5C19C86945896322" xlink:to="loc_srt_ConsolidationItemsDomain_724622F48799DA7EBC3EC869458A7982_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_724622F48799DA7EBC3EC869458A7982" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_0F58D4EDC12AD0CC5C19C86945896322" xlink:to="loc_srt_ConsolidationItemsDomain_724622F48799DA7EBC3EC869458A7982" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_FD46CC0E25BF2D4ABB8BC869458AE9F3" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_724622F48799DA7EBC3EC869458A7982" xlink:to="loc_us-gaap_OperatingSegmentsMember_FD46CC0E25BF2D4ABB8BC869458AE9F3" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="loc_us-gaap_CorporateNonSegmentMember_D86781B7CAB4592B00C9C869458DA3B8" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_724622F48799DA7EBC3EC869458A7982" xlink:to="loc_us-gaap_CorporateNonSegmentMember_D86781B7CAB4592B00C9C869458DA3B8" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_PeriodWithinWhichAssetWillBeSold" xlink:label="loc_spxc_PeriodWithinWhichAssetWillBeSold_A4D70052A4CDA410746EC869458D8F5C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_E5B7DA202C7DDA066CB1C869458D53E0" xlink:to="loc_spxc_PeriodWithinWhichAssetWillBeSold_A4D70052A4CDA410746EC869458D8F5C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_PeriodWithinWhichLiabilitiesWillBeSettled" xlink:label="loc_spxc_PeriodWithinWhichLiabilitiesWillBeSettled_D5B7057D9AFC31A285F9C869458E3974" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_E5B7DA202C7DDA066CB1C869458D53E0" xlink:to="loc_spxc_PeriodWithinWhichLiabilitiesWillBeSettled_D5B7057D9AFC31A285F9C869458E3974" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringChargesAbstract" xlink:label="loc_us-gaap_RestructuringChargesAbstract_F88F68C3E4F24FE2D979C869458E08FD" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_E5B7DA202C7DDA066CB1C869458D53E0" xlink:to="loc_us-gaap_RestructuringChargesAbstract_F88F68C3E4F24FE2D979C869458E08FD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SeveranceCosts1" xlink:label="loc_us-gaap_SeveranceCosts1_8CCC38F8E1CC7B1CAB41C869458F69E5" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringChargesAbstract_F88F68C3E4F24FE2D979C869458E08FD" xlink:to="loc_us-gaap_SeveranceCosts1_8CCC38F8E1CC7B1CAB41C869458F69E5" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_OtherCashCostsRecoveriesNet" xlink:label="loc_spxc_OtherCashCostsRecoveriesNet_ED5C51A64E7954EFEDC6C869458F53FF" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringChargesAbstract_F88F68C3E4F24FE2D979C869458E08FD" xlink:to="loc_spxc_OtherCashCostsRecoveriesNet_ED5C51A64E7954EFEDC6C869458F53FF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringCostsAndAssetImpairmentCharges" xlink:label="loc_us-gaap_RestructuringCostsAndAssetImpairmentCharges_021CC933250E1A83726CC869458FA79A" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringChargesAbstract_F88F68C3E4F24FE2D979C869458E08FD" xlink:to="loc_us-gaap_RestructuringCostsAndAssetImpairmentCharges_021CC933250E1A83726CC869458FA79A" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SpecialCharges" xlink:label="loc_spxc_SpecialCharges_CEAFF4E194A7C3761C66C86945906A3B" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringChargesAbstract_F88F68C3E4F24FE2D979C869458E08FD" xlink:to="loc_spxc_SpecialCharges_CEAFF4E194A7C3761C66C86945906A3B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated" xlink:label="loc_us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated_BB7BB43970066E84ED71C8694590E9AF" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringChargesAbstract_F88F68C3E4F24FE2D979C869458E08FD" xlink:to="loc_us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated_BB7BB43970066E84ED71C8694590E9AF" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetImpairmentCharges" xlink:label="loc_us-gaap_AssetImpairmentCharges_F53AE651AC877E3C44D1C86945916E40" xlink:type="locator"/>

<link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringChargesAbstract_F88F68C3E4F24FE2D979C869458E08FD" xlink:to="loc_us-gaap_AssetImpairmentCharges_F53AE651AC877E3C44D1C86945916E40" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="loc_us-gaap_RestructuringReserveRollForward_0F0F9F2B56E08FB53046C8694591EA2B" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_E5B7DA202C7DDA066CB1C869458D53E0" xlink:to="loc_us-gaap_RestructuringReserveRollForward_0F0F9F2B56E08FB53046C8694591EA2B" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_RestructuringAndIntegrationReserves" xlink:label="loc_spxc_RestructuringAndIntegrationReserves_1243924AC60A83162243C8694592910F" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_0F0F9F2B56E08FB53046C8694591EA2B" xlink:to="loc_spxc_RestructuringAndIntegrationReserves_1243924AC60A83162243C8694592910F" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_RestructuringAndIntegrationReservesPeriodExpense" xlink:label="loc_spxc_RestructuringAndIntegrationReservesPeriodExpense_AD9B0215293BA636FC40C869459282CD" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_0F0F9F2B56E08FB53046C8694591EA2B" xlink:to="loc_spxc_RestructuringAndIntegrationReservesPeriodExpense_AD9B0215293BA636FC40C869459282CD" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_RestructuringAndIntegrationReserveSettledWithCash" xlink:label="loc_spxc_RestructuringAndIntegrationReserveSettledWithCash_C4A96535EC6A2BC0E57FC8694593E354" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_0F0F9F2B56E08FB53046C8694591EA2B" xlink:to="loc_spxc_RestructuringAndIntegrationReserveSettledWithCash_C4A96535EC6A2BC0E57FC8694593E354" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_RestructuringAndIntegrationReservesTranslationAndOtherAdjustment" xlink:label="loc_spxc_RestructuringAndIntegrationReservesTranslationAndOtherAdjustment_1E6A6CA22AAAE479BA4CC869459387A6" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_0F0F9F2B56E08FB53046C8694591EA2B" xlink:to="loc_spxc_RestructuringAndIntegrationReservesTranslationAndOtherAdjustment_1E6A6CA22AAAE479BA4CC869459387A6" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SpecialChargesNonCash" xlink:label="loc_spxc_SpecialChargesNonCash_38E8C07494B93F1E08AFC86945936238" xlink:type="locator"/>

<link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_E5B7DA202C7DDA066CB1C869458D53E0" xlink:to="loc_spxc_SpecialChargesNonCash_38E8C07494B93F1E08AFC86945936238" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/SpecialChargesNetTables" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/SubsequentEvent" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/SubsequentEventDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:label="loc_us-gaap_SubsequentEventLineItems_F90071B0770B1C062E6AC9BF228CD482" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTable" xlink:label="loc_us-gaap_SubsequentEventTable_ED3F04487C787B1ACF35C9BF228AEE87" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_F90071B0770B1C062E6AC9BF228CD482" xlink:to="loc_us-gaap_SubsequentEventTable_ED3F04487C787B1ACF35C9BF228AEE87" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_F5426A9746794A08ECA0C9BF229F1814" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_ED3F04487C787B1ACF35C9BF228AEE87" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_F5426A9746794A08ECA0C9BF229F1814" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_16A0CB37EAE799469150C9BF22A15A9E_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_F5426A9746794A08ECA0C9BF229F1814" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_16A0CB37EAE799469150C9BF22A15A9E_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_16A0CB37EAE799469150C9BF22A15A9E" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_F5426A9746794A08ECA0C9BF229F1814" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_16A0CB37EAE799469150C9BF22A15A9E" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SabikMarineMember" xlink:label="loc_spxc_SabikMarineMember_6060440207F0C31A9420C9BF9B702224" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_16A0CB37EAE799469150C9BF22A15A9E" xlink:to="loc_spxc_SabikMarineMember_6060440207F0C31A9420C9BF9B702224" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_41065F0E2F61A0A99046C9BF228A1EDA" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_ED3F04487C787B1ACF35C9BF228AEE87" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_41065F0E2F61A0A99046C9BF228A1EDA" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_F14DF64E04F062C10F5DC9BF228B60FD_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_41065F0E2F61A0A99046C9BF228A1EDA" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_F14DF64E04F062C10F5DC9BF228B60FD_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_F14DF64E04F062C10F5DC9BF228B60FD" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_41065F0E2F61A0A99046C9BF228A1EDA" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_F14DF64E04F062C10F5DC9BF228B60FD" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_1F3F114F2262DE050D49C9C100968706" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_F14DF64E04F062C10F5DC9BF228B60FD" xlink:to="loc_us-gaap_SubsequentEventMember_1F3F114F2262DE050D49C9C100968706" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_CFE85698DCDF403144D8C9C00D7061E0" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_F90071B0770B1C062E6AC9BF228CD482" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_CFE85698DCDF403144D8C9C00D7061E0" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/UseOfEstimates" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/UseOfEstimatesAccruedExpensesDetails" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/UseOfEstimatesDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ValuationAndQualifyingAccountsDisclosureLineItems" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_60674BDC36EA76F42636C86948341B6E" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ValuationAndQualifyingAccountsDisclosureTable" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_65D00F236AC3A00A5511C869482F1940" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_60674BDC36EA76F42636C86948341B6E" xlink:to="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_65D00F236AC3A00A5511C869482F1940" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_9712369C8B81CD0D3464C8694832D9D5" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_65D00F236AC3A00A5511C869482F1940" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_9712369C8B81CD0D3464C8694832D9D5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_0244627147F1ABB67456C86948332583_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_9712369C8B81CD0D3464C8694832D9D5" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_0244627147F1ABB67456C86948332583_default" xlink:type="arc"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_9712369C8B81CD0D3464C8694832D9D5" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_0244627147F1ABB67456C86948332583" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllowanceForCreditLossMember" xlink:label="loc_us-gaap_AllowanceForCreditLossMember_22370D97FDC47169898EC8694834ED99" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_0244627147F1ABB67456C86948332583" xlink:to="loc_us-gaap_AllowanceForCreditLossMember_22370D97FDC47169898EC8694834ED99" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_EFFBA17F8E826BA98BE8C86948346866" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_60674BDC36EA76F42636C86948341B6E" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_EFFBA17F8E826BA98BE8C86948346866" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_36A6349E9CF3A42AD821C8694835B900" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_EFFBA17F8E826BA98BE8C86948346866" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_36A6349E9CF3A42AD821C8694835B900" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_E4D2FC4206F979596898C8694836A530" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_EFFBA17F8E826BA98BE8C86948346866" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_E4D2FC4206F979596898C8694836A530" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDeductions" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDeductions_037CA6B7B68A1336E410C8694837CC43" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_EFFBA17F8E826BA98BE8C86948346866" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDeductions_037CA6B7B68A1336E410C8694837CC43" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/UseOfEstimatesNarrativeDetails" xlink:type="extended">

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsLineItems" xlink:label="loc_us-gaap_GuaranteeObligationsLineItems_671C1A3412F429A8BBD15D1D6B0548F7" xlink:type="locator"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfGuaranteeObligationsTable" xlink:label="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_0977246EFB232229BF675D1D6B018BF7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_671C1A3412F429A8BBD15D1D6B0548F7" xlink:to="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_0977246EFB232229BF675D1D6B018BF7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsByNatureAxis" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis_3BFE7C3FB7F3EBF9D0F85D1D6B023B22" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_0977246EFB232229BF675D1D6B018BF7" xlink:to="loc_us-gaap_GuaranteeObligationsByNatureAxis_3BFE7C3FB7F3EBF9D0F85D1D6B023B22" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_3B5F78E4FEADFC929A2A5D1D6B02FE21_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_3BFE7C3FB7F3EBF9D0F85D1D6B023B22" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_3B5F78E4FEADFC929A2A5D1D6B02FE21_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_3B5F78E4FEADFC929A2A5D1D6B02FE21" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_3BFE7C3FB7F3EBF9D0F85D1D6B023B22" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_3B5F78E4FEADFC929A2A5D1D6B02FE21" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BankandSuretyBondsMember" xlink:label="loc_spxc_BankandSuretyBondsMember_3886AAD69E238733B28B5D1D6B02A9CE" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_3B5F78E4FEADFC929A2A5D1D6B02FE21" xlink:to="loc_spxc_BankandSuretyBondsMember_3886AAD69E238733B28B5D1D6B02A9CE" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_2934C01E6F82EBC716D75D1D6B02507D" xlink:type="locator"/>

<link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_0977246EFB232229BF675D1D6B018BF7" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_2934C01E6F82EBC716D75D1D6B02507D" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_B2ADDF6ADB9D833E74065D1D6B03C2B7_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_2934C01E6F82EBC716D75D1D6B02507D" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_B2ADDF6ADB9D833E74065D1D6B03C2B7_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_B2ADDF6ADB9D833E74065D1D6B03C2B7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_2934C01E6F82EBC716D75D1D6B02507D" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_B2ADDF6ADB9D833E74065D1D6B03C2B7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfBySaleMember" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_FA9D926F41D24CD8A7355D1D6B0300F5" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_B2ADDF6ADB9D833E74065D1D6B03C2B7" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_FA9D926F41D24CD8A7355D1D6B0300F5" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4A1CA9B98A6AA321C2845D1D6B03993B" xlink:type="locator"/>

<link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_0977246EFB232229BF675D1D6B018BF7" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4A1CA9B98A6AA321C2845D1D6B03993B" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3334E2D5DFA8DAB81E7F5D1D6B039C94_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4A1CA9B98A6AA321C2845D1D6B03993B" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3334E2D5DFA8DAB81E7F5D1D6B039C94_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3334E2D5DFA8DAB81E7F5D1D6B039C94" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4A1CA9B98A6AA321C2845D1D6B03993B" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3334E2D5DFA8DAB81E7F5D1D6B039C94" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_BalckeDurrBusinessMember" xlink:label="loc_spxc_BalckeDurrBusinessMember_E9A1B63F72B8ED9ABAA95D1D6B04D136" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3334E2D5DFA8DAB81E7F5D1D6B039C94" xlink:to="loc_spxc_BalckeDurrBusinessMember_E9A1B63F72B8ED9ABAA95D1D6B04D136" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CounterpartyNameAxis" xlink:label="loc_srt_CounterpartyNameAxis_31D05785B9FAB8E7475A5D1D6B048120" xlink:type="locator"/>

<link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_0977246EFB232229BF675D1D6B018BF7" xlink:to="loc_srt_CounterpartyNameAxis_31D05785B9FAB8E7475A5D1D6B048120" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_7EDC71CB56E4FDB3DFEE5D1D6B04990C_default" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_31D05785B9FAB8E7475A5D1D6B048120" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_7EDC71CB56E4FDB3DFEE5D1D6B04990C_default" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_7EDC71CB56E4FDB3DFEE5D1D6B04990C" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_31D05785B9FAB8E7475A5D1D6B048120" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_7EDC71CB56E4FDB3DFEE5D1D6B04990C" xlink:type="arc"/>

<link:loc xlink:href="spxc-20181231.xsd#spxc_SubsidiaryofmutaresAGtheBuyerMember" xlink:label="loc_spxc_SubsidiaryofmutaresAGtheBuyerMember_8273F38CAED821D9D3385D1D6B043AF7" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_7EDC71CB56E4FDB3DFEE5D1D6B04990C" xlink:to="loc_spxc_SubsidiaryofmutaresAGtheBuyerMember_8273F38CAED821D9D3385D1D6B043AF7" xlink:type="arc"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsMaximumExposure" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_620291CEC0E841046D3B5D1D6B05BBDA" xlink:type="locator"/>

<link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_671C1A3412F429A8BBD15D1D6B0548F7" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_620291CEC0E841046D3B5D1D6B05BBDA" xlink:type="arc"/>

</link:definitionLink>

<link:definitionLink xlink:role="http://www.spx.com/role/UseOfEstimatesTables" xlink:type="extended"/>

<link:definitionLink xlink:role="http://www.spx.com/role/UseOfEstimatesWarrantyDetails" xlink:type="extended"/>

</link:linkbase>

↑Top

Filing Submission 0000088205-19-000008 – Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)

SPX Corp – ‘10-K’ for 12/31/18 – ‘EX-101.DEF’

On: Friday, 2/15/19, at 5:08pm ET · For: 12/31/18 · Accession #: 88205-19-8 · File #: 1-06948

Previous ‘10-K’: ‘10-K’ on 2/21/18 for 12/31/17 · Next: ‘10-K’ on 2/14/20 for 12/31/19 · Latest: ‘10-K’ on 2/23/24 for 12/31/23

Annual Report — Form 10-K — Sect. 13 / 15(d) – SEA’34Filing Table of Contents

‘EX-101.DEF’ — XBRL Definitions — spxc-20181231_def

This Exhibit is an XBRL XML File.

Annual Report — Form 10-K — Sect. 13 / 15(d) – SEA’34
Filing Table of Contents