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

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 …

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.

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 …

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

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

The Quacks of Quedlinburg, a bag-building, push-your-luck board game, affectionately known as "Quacks" for short, designed by Wolfgang Warsch.

There are good quacks and bad quacks. A good quack is the sound a duck makes. A bad quack is someone pretending to be a doctor. (You'd be better off visiting the duck with your ailment.)

Synonyms for QUACK: fraud, fake, sham, charlatan, pretender, mountebank, faker, deceiver; Antonyms of QUACK: expert, master, authority, professional, wizard, virtuoso, ace, whiz