Meanings
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1
adj
having the appearance of being real but lacking capacity to function
A dummy corporation.
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2
verb
make a dummy of
Dummy up the books that are to be published.
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3
noun
A silent person; a person who does not talk.
The man's name […] was engraved in the centre, and beneath this, written in ink with the same elaborate precision as the engraving, there was a brief message. I am a deaf-mute, but I read the lips and understand what is said to me. Please do not shout. […] Singer looked very carefully at his lips when he spoke—he had noticed that before. But a dummy!
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4
noun
A stupid person.
Don't be such a dummy!
Thesaurus
Etymology
From dumb + -y. Pacifier sense from dummy teat where dummy is in the sense of a nonfunctional replica.