Oxford Advanced American Dictionary

Definition of dummy noun from the Oxford Advanced Learner's Dictionary

dummy

noun
dummy pronunciation English ˈdʌmi dummy pronunciation American ˈdʌmi
 
plural dummies1 [countable] a model of a person, used especially when making clothes or for showing them in a shop windowa tailor's dummya ventriloquist's dummy see also mannequin (2)2 [countable] a thing that seems to be real but is only a copy of the real thingThe bottles of whisky on display are all dummies.3 [countable] (North American English, informal) a stupid personDon't just stand there, you dummy.4 [countable] (in some sports) an occasion when you pretend to make a particular move and then do not do so5 [countable] (British English) (North American English pacifier) a specially shaped rubber or plastic object for a baby to suck6 [uncountable] (in card games, especially bridge) the cards which are placed facing upwards on the table and which can be seen by all the playersShe played a jack from dummy.