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.

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

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 as …

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

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 his or her …

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 understanding …

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

being or relating to a quack or quackery: quack methods; quack medicine. quack1 (kwak), n. Animal Behavior the harsh, throaty cry of a duck or any similar sound. to utter the cry of a duck or a sound …

Quack definition: The characteristic sound uttered by a duck.