quack

Fetched 2026-10-29 (cache).

Synonyms: quick, quawk, quark, quach, quaco, queck, quac

Antonyms: quick, quawk, quark, quach, quaco, queck, quac

Related words from Datamuse; suggestions, not definitions.

Noun

1. The vocalisation made by a duck.
   • Did you hear that duck make a quack?

Verb

1. Of a duck, to make its characteristic vocalisation.
   • The more breadcrumbs I threw on the ground, the more they quacked.
   • Do you hear the ducks quack?
2. To make a sound similar to the quack of a duck.
3. Of a queen bee: to make a high-pitched sound during certain stages of development.

Interjection

1. A duck's quack.

Noun

1. A fraudulent healer, especially a bombastic peddler in worthless treatments, a doctor who makes false diagnoses for monetary benefit, or an untrained or poorly trained doctor who uses fraudulent credentials to attract patients .mw-parser-output .defdate{font-size:smaller}
   • That doctor is nothing but a lousy quack!
2. Any similar charlatan or incompetent professional.
3. Any doctor.
   • That quack wants me to quit smoking, eat less, and start exercising. The nerve!

Verb

1. To practice or commit quackery (fraudulent medicine).
2. To make vain and loud pretensions.

Adjective

1. Falsely presented as having medicinal powers.
   • Don't get your hopes up; that's quack medicine!

Source: Wiktionary · CC BY-SA 3.0 (Wiktionary) · cached copy, not a rewrite.