Definition of quack

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< Quaalude

quack >

quack ¹

(kw

k) KEY

NOUN:

The characteristic sound uttered by a duck.

intr.v.
quacked , quack·ing , quacks

To utter the characteristic sound of a duck.

ETYMOLOGY:
Middle English quek, of imitative origin

OTHER FORMS:
quacky (Adjective)

Thesaurus: synonyms for quack

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The American Heritage® Dictionary of the English Language, Fourth Edition.
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