American English

Definition of gaga adjective from the Oxford Advanced American Dictionary

     

    gaga

     adjective
    adjective
    NAmE//ˈɡɑɡɑ//
     
    [not usually before noun] (informal)
     
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  1. 1slightly crazy because you are very excited about someone or something, or very much in love The fans went totally gaga over the band.
  2. 2(offensive) slightly crazy or silly Don't listen to him; he's a little gaga.
See the Oxford Advanced Learner's Dictionary entry: gaga