Definition of nocturnal adjective from the Oxford Advanced American Dictionary

     

    nocturnal

     adjective
    adjective
    NAmE//nɑkˈtərnl//
     
     
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  1. 1(of animals) active at night opposite diurnal
  2. 2(formal) happening during the night a nocturnal visit
See the Oxford Advanced Learner's Dictionary entry: nocturnal

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