To quack is to make a noise like a duck. When someone quacks, it usually means that they are unhappy or disappointed.

  • The doctor was quacking all the time, and it was making me uncomfortable.

  • The salesman was quacking all the time, and it was making me feel unwelcome.

Definition of quack


act as a medical quack or a charlatan


an untrained person who pretends to be a physician and who dispenses medical advice


medically unqualified


the harsh sound of a duck


utter quacking noises

Nearby Words

quack Pronunciation in a video

Example Sentences for quack

  • 1

    Next he became a quack doctor and soothsayer.

  • 2

    The girl was quacking in cold.

  • 3

    Brown was actually a swindler and quack.

  • 4

    People found the source of quacks.

  • 5

    Suddenly, the duck stopped quacks.

  • 6

    He was annoyed by loud quacks.

  • 7

    He heard quacks at night.

  • 8

    The sound of quack scared people.

  • 9

    This is the quack and the conduct of this man is quackery.

  • 10

    Where is this quack coming from