Definition of dummy noun from the Oxford Advanced American Dictionary

     

    dummy

     noun
    noun
    NAmE//ˈdʌmi//
     
    (pl. dummies)
     
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  1. 1 [countable] a model of a person, used especially when making clothes or for showing them in a store window a tailor's dummy a ventriloquist's dummy
  2. 2[countable] a thing that seems to be real but is only a copy of the real thing The bottles of whiskey on display are all dummies.
  3. 3 [countable] (informal) a stupid person Don't just stand there, you dummy.
  4. 4[countable] (in some sports) an occasion when you pretend to pass the ball to another player and then do not do so
  5. 5[uncountable] (in card games, especially bridge) the cards that are placed facing upward on the table and that can be seen by all the players She played a jack from dummy.
See the Oxford Advanced Learner's Dictionary entry: dummy