Definition of prolong verb from the Oxford Advanced Learner's Dictionary

 

prolong

 verb
verb
BrE BrE//prəˈlɒŋ//
 
; NAmE NAmE//prəˈlɔːŋ//
 
, NAmE//prəˈlɑːŋ//
 
Verb Forms present simple I / you / we / they prolong
BrE BrE//prəˈlɒŋ//
 
; NAmE NAmE//prəˈlɔːŋ//
 
, NAmE//prəˈlɑːŋ//
 
he / she / it prolongs
BrE BrE//prəˈlɒŋz//
 
; NAmE NAmE//prəˈlɔːŋz//
 
, NAmE//prəˈlɑːŋz//
 
past simple prolonged
BrE BrE//prəˈlɒŋd//
 
; NAmE NAmE//prəˈlɔːŋd//
 
, NAmE//prəˈlɑːŋd//
 
past participle prolonged
BrE BrE//prəˈlɒŋd//
 
; NAmE NAmE//prəˈlɔːŋd//
 
, NAmE//prəˈlɑːŋd//
 
-ing form prolonging
BrE BrE//prəˈlɒŋɪŋ//
 
; NAmE NAmE//prəˈlɔːŋɪŋ//
 
, NAmE//prəˈlɑːŋɪŋ//
 
 
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prolong something to make something last longer synonym extend The operation could prolong his life by two or three years. Don't prolong the agony (= of not knowing something)—just tell us who won! Word Origin late Middle English: from Old French prolonguer, from late Latin prolongare, from pro- ‘forward, onward’ + longus ‘long’.Extra examples Might it be possible to prolong life indefinitely? We do not want to prolong the meeting unnecessarily. Don’t prolong the agony —just tell us who won! to prolong your stay/​visit/​life/​survival/​agony/​misery
See the Oxford Advanced American Dictionary entry: prolong