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  1. QUACK Definition & Meaning | Dictionary.com

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

  2. QUACK Definition & Meaning - Merriam-Webster

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

  3. QUACK | English meaning - Cambridge Dictionary

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

  4. QUACK definition and meaning | Collins English Dictionary

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

  5. Quack - definition of quack by The Free Dictionary

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

  6. quack - Wiktionary, the free dictionary

    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 …

  7. quack noun - Definition, pictures, pronunciation and usage ...

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