Definition of blackjack noun from the Oxford Advanced American Dictionary

     

    blackjack

     noun
    noun
    NAmE//ˈblækdʒæk//
     
     
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  1. 1 [uncountable] a card game in which players try to collect cards with a total value of 21 and no more
  2. 2 [countable] a type of club used as a weapon, especially a metal pipe covered with leather
See the Oxford Advanced Learner's Dictionary entry: blackjack