jack - definition and synonyms

 
noun 

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/dʒæk/
singularjack
pluraljacks
  1. 2
    [countable] a playing card that has a picture of a young man on it and is worth more than a ten and less than a queen

    the jack of diamonds

  2. 4
    [countable] a small white ball that you roll larger balls towards in the game of bowls
  3. 6

    jack

    or

    jack shit

    [uncountable] mainly American impolite anything or nothing at all