The meaning of QUACK is to make the characteristic cry of a duck. How to use quack in a sentence.

QUACK definition: the harsh, throaty cry of a duck or any similar sound. See examples of quack used in a sentence.

A quack is a "fraudulent or ignorant pretender to medical skill" or "a person who pretends, professionally or publicly, to have skill, knowledge, qualification or credentials they do not …

QUACK definition: 1. to make the usual sound of a duck: 2. a person who dishonestly pretends to have medical skills…. Learn more.

quackery, the characteristic practice of quacks or charlatans, who pretend to knowledge and skill that they do not possess, particularly in medicine. The quack makes exaggerated claims about …

Jan 20, 2026 · Adjective quack (comparative more quack or quacker, superlative most quack or quackest) (quacker and quackest are rare, and probably used humorously) Falsely presented …

If you call someone a quack or a quack doctor, you mean that they claim to be skilled in medicine but are not.

QUACK meaning: 1. to make the usual sound of a duck: 2. a person who dishonestly pretends to have medical skills…. Learn more.

We could hear the ducks quacking. That quack almost killed me by prescribing the wrong medication. Her doctor turned out to be a real quack.

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