Definition of prolong verb from the Oxford Advanced American Dictionary

     

    prolong

     verb
    verb
    NAmE//prəˈlɔŋ//
     
    prolong somethingVerb Forms present simple I / you / we / they prolong
     
    ,
     
    he / she / it prolongs
     
    ,
     
    past simple prolonged
     
    ,
     
    -ing form prolonging
     
    ,
     
     
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  1. 1to make something last longer synonym extend
  2. 2 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!
See the Oxford Advanced Learner's Dictionary entry: prolong