Definition of adversary noun from the Oxford Advanced American Dictionary

     

    adversary

     noun
    noun
    NAmE//ˈædvərˌsɛri//
     
    (pl. adversaries)(formal)
     
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  1. 1a person that someone is opposed to and competing with in an argument or a battle synonym opponent
  2. 2 his old political adversary
See the Oxford Advanced Learner's Dictionary entry: adversary