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.

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

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

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 …

6 days ago · The word “quack” has a surprisingly rich history rooted in Dutch street markets and patent medicine scams. Here’s how it became shorthand for medical fraud.

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

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 …

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 American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.