Definition of uncool adjective from the Oxford Advanced American Dictionary

     

    uncool

     adjective
    adjective
    NAmE//ʌnˈkul//
     
    (informal)
     
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  1. 1not considered acceptable by fashionable young people synonym unhip
  2. 2 My kids tell me my hairstyle is really uncool. opposite cool
See the Oxford Advanced Learner's Dictionary entry: uncool