Definition of fly adjective from the Oxford Advanced Learner's Dictionary

     

    fly

     adjective
    adjective
    BrE BrE//flaɪ//
     
    ; NAmE NAmE//flaɪ//
     
    (informal)
     
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  1. 1(British English) clever and showing good judgement about people, especially so that you can get an advantage for yourself
  2. 2(North American English, informal) fashionable and attractive
  3. Word Originadjective early 19th cent.: of unknown origin.
See the Oxford Advanced American Dictionary entry: fly