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

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

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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 possess; a charlatan or …

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

Dec 14, 2025 · quack (third-person singular simple present quacks, present participle quacking, simple past and past participle quacked) To make a noise like a duck. The more breadcrumbs I threw on the …

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

quack (kwæk) vb (intr) 1. (of a duck) to utter a harsh guttural sound 2. to make a noise like a duck

Discover the meaning of Quack, explore its usage in everyday language, popular idioms, and fun facts that make this word fascinating. Perfect for learners and curious minds!

Definition of quack noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.