Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary
1

quack

play
verb \ˈkwak\

Definition of quack

  1. intransitive verb
  2. :  to make the characteristic cry of a duck



Origin and Etymology of quack

alteration of queck to quack, from Middle English queken, from queke, interjection, of imitative origin


First Known Use: 14th century


2

quack

noun

Definition of quack

  1. :  a noise made by quacking



1798

First Known Use of quack

1798


3

quack

verb

Definition of quack

  1. intransitive verb
  2. :  to act like a quack



Origin and Etymology of quack

4quack


First Known Use: 1628


4

quack

noun

Definition of quack

  1. 1 :  charlatan 2

  2. 2 :  a pretender to medical skill

quackish

play \ˈkwa-kish\ adjective


Origin and Etymology of quack

short for quacksalver


First Known Use: 1638


5

quack

adjective

Definition of quack

  1. :  of, relating to, or used by quacks <quack cancer cures>



1653

First Known Use of quack

1653


QUACK Defined for Kids

1

quack

play
verb \ˈkwak\

Definition of quack for Students

quacked

quacking

  1. :  to make the cry of a duck




2

quack

play
noun

Definition of quack for Students

  1. :  a cry made by a duck




3

quack

play
noun

Definition of quack for Students

  1. :  a person who pretends to have medical knowledge and skill




4

quack

play
adjective

Definition of quack for Students

  1. :  relating to, being, or used by a person who pretends to have medical skill <a quack doctor> <quack remedies>




Medical Dictionary

1

quack

play
noun \ˈkwak\

Medical Definition of quack

  1. :  a pretender to medical skill :  an ignorant or dishonest practitioner

quackish

\-ish\play adjective



2

quack

adjective

Medical Definition of quack

  1. :  of, relating to, characteristic of, or being a quack <scores of quack remedies for arthritis—Jane E. Brody>





Seen and Heard

What made you want to look up quack? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

of, relating to, or near a shore

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

lavender-fields-in-france

Which of these is a synonym of caesura?

megillah rebellion interruption torrent
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ