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

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.

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 …

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.

Pertaining to or characterized by quackery of any kind; specifically, falsely pretending to cure disease, or ignorantly or fraudulently set forth as remedies: as, a quack doctor; quack medicines.