Definition of pinstripe noun from the Oxford Advanced American Dictionary

     

    pinstripe

     noun
    noun
    NAmE//ˈpɪnstraɪp//
     
     
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  1. 1[countable] one of the white vertical lines printed on dark cloth that is used especially for making business suits
  2. 2[uncountable, countable] dark cloth with white vertical lines printed on it; a suit made from this cloth a tall man in gray pinstripe Without a pinstripe, you'd be underdressed. a pinstripe suit
NAmE//ˈpɪnstraɪpt//
 
adjective [only before noun] a pinstriped suit a pinstriped official (= who is wearing a pinstriped suit)
See the Oxford Advanced Learner's Dictionary entry: pinstripe