Definition of berserk adjective from the Oxford Advanced American Dictionary

     

    berserk

     adjective
    adjective
    NAmE//bərˈzərk//
     
    , NAmE//bərˈsərk//
     
    [not usually before noun]
     
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  1. 1 very angry, often in a violent or uncontrolled way He went berserk when he found out where I was.
  2. 2 very excited The kids were going berserk with excitement.
See the Oxford Advanced Learner's Dictionary entry: berserk