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

     

    enthusiast

     noun
    noun
    BrE BrE//ɪnˈθjuːziæst//
     
    ; NAmE NAmE//ɪnˈθuːziæst//
     
    Showing interest
     
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  1. 1enthusiast (for/of something) a person who is very interested in something and spends a lot of time doing it a football enthusiast an enthusiast of jazz See related entries: Showing interest
  2. 2enthusiast (for/of something) a person who approves of something and shows enthusiasm for it enthusiasts for a united Europe
  3. Word Origin early 17th cent. (denoting a person believing that he or she is divinely inspired): from French enthousiaste or ecclesiastical Latin enthusiastes ‘member of a heretical sect’, from Greek enthousiastēs ‘person inspired by a god’, from the adjective enthous ‘possessed by a god, inspired’ (based on theos ‘god’).Extra examples Railway enthusiasts were given the chance to ride on the old steam train during the weekend. She was a lifelong enthusiast of dancing, running and waterskiing. jazz/​fishing/​DIY fans/​enthusiasts
See the Oxford Advanced American Dictionary entry: enthusiast