1

quack

verb \ ˈkwak \

Definition of quack

intransitive verb
: 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


2

quack

noun

Definition of quack

: a noise made by quacking

First Known Use of quack

1798


3

quack

verb

Definition of quack

intransitive verb
: to act like a quack

Origin and Etymology of quack


4

quack

noun

Definition of quack

1 : charlatan 2
  • Religious quacks on radio and television thinking up new ways to take money from ignorant listeners and incidentally from legitimate churches.
  • —Andrew A. Rooney
2 : an ignorant, misinformed, or dishonest practitioner of medicine
  • No doubt these misunderstandings and dashed hopes have driven many cancer patients and their families into the arms of quacks.
  • —Haydn Bush

quackish

play \ˈkwa-kish\ adjective

Origin and Etymology of quack

short for quacksalver


5

quack

adjective

Definition of quack

: of, relating to, or used by quacks
  • quack cancer cures

First Known Use of quack

1653


QUACK Defined for Kids

1

quack

verb \ ˈkwak \

Definition of quack for Students

quacked; quacking
: to make the cry of a duck

2

quack

noun

Definition of quack for Students

: a cry made by a duck

3

quack

noun

Definition of quack for Students

: a person who pretends to have medical knowledge and skill

4

quack

adjective

Definition of quack for Students

: relating to, being, or used by a person who pretends to have medical skill
  • a quack doctor
  • quack remedies

Medical Dictionary

1

quack

noun \ ˈkwak \

medical Definition of quack

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

quackish

play \-ish\ adjective

2

quack

adjective

medical Definition of quack

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


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