Definition of quack
What does the word quack mean?
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part of speech: verb intransitive
(Utter) harsh sound made by ducks; talk loudly& foolishly; q.-q. (nursery), duck. [Dutch]
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part of speech: noun
Ignorant pretender to skill esp. in medicine or surgery, one who offers wonderful remedies or devices, charlatan, (often attrib., as q. doctor, remedies); hence quackery (4) n., quackish a., (Vb) play the q.; talk pretentiously; puff or advertise (cure &c.).
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