Definition of corsair noun from the Oxford Advanced Learner's Dictionary

     

    corsair

     noun
    noun
    BrE BrE//kɔːˈseə(r)//
     
    ; NAmE NAmE//kɔːrˈser//
     
    (old use)
     
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  1. 1a pirate
  2. 2 a privately owned merchant ship which has the job of fighting in a war
  3. Word Origin mid 16th cent.: from French corsaire, from medieval Latin cursarius, from cursus ‘a raid, plunder’, special use of Latin cursus ‘course’, from currere ‘to run’.
See the Oxford Advanced American Dictionary entry: corsair