The meaning of QUACK is to make the characteristic cry of a duck. How to use quack 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: the harsh, throaty cry of a duck or any similar sound.. See examples of QUACK used in a sentence.

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

quack 2 (kwæk) n. 1. a fraudulent pretender to medical skill. 2. a person who pretends, professionally or publicly, to skill, knowledge, or qualifications he or she does not possess; a …

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

Dec 2, 2025 · Adjective quack (comparative more quack or quacker, superlative most quack or quackest) (quacker and quackest are rare, and probably used humorously) Falsely presented …

Sep 12, 2025 · The word “quack” isn’t just slang—it's a potent term used to identify deception, fraud, and unqualified practitioners. Whether you’re trying to spot a fake healthcare provider or …

Quack definition: The characteristic sound uttered by a duck.

Factsheet What does the word quack mean? There are three meanings listed in OED's entry for the word quack. See ‘Meaning & use’ for definitions, usage, and quotation evidence.