American English

Definition of whack noun from the Oxford Advanced American Dictionary



[usually singular] (informal)
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  • the act of hitting someone or something hard; the sound made by this He gave the ball a good whack. I heard the whack of the bullet hitting the wood.
  • Idioms
      out of whack (informal)
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    1. 1 no longer correct or working correctly The system is clearly out of whack. All the traveling had thrown my body out of whack. The spending priorities were out of whack.
    2. 2 not agreeing with or not the same as something else Expectations and reality got out of whack.
    See the Oxford Advanced Learner's Dictionary entry: whack

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