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English definition of “quack”

quack

noun [C] (PERSON)    /kwæk/
disapproving a person who dishonestly pretends to have medical skills or knowledgeFaking and pretendingDoctors and health workers generally UK informal often disapproving a doctor: Have you seen a quack about that cough?Doctors and health workers generally
(Definition of quack noun (PERSON) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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