Definition of aggression noun from the Oxford Advanced American Dictionary

     

    aggression

     noun
    noun
    NAmE//əˈɡrɛʃn//
     
    [uncountable]
     
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  1. 1feelings of anger and hatred that may result in threatening or violent behavior The research shows that computer games may cause aggression. Nowadays our aggression is channeled into sports.
  2. 2a violent attack or threats by one person against another person or by one country against another country unprovoked military aggression
See the Oxford Advanced Learner's Dictionary entry: aggression