(noun, adjective, verb)


1. medically unqualified

- a quack doctor

Similar word(s): unqualified

Sentences with quack as an adjective:

- Don't get your hopes up; that's quack medicine!


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

Definition categories: person, doc, doctor, medico, physician, charlatan, mountebank

2. the harsh sound of a duck

Definition categories: event, sound

Sentences with quack as a noun:

- Did you hear that duck make a quack?

- That doctor is nothing but a lousy quack!

- Polly (to security guard, referring to Dr. Feingarten): Are you going to let that shyster in there?Dr. Feingarten: I could sue you, Polly. A shyster is a disreputable lawyer. I'm a quack.- From the motion picture SOB


1. utter quacking noises

- The ducks quacked

Definition categories: communication, emit, utter

2. act as a medical quack or a charlatan

Definition categories: body, act, behave, do

Sentences with quack as a verb:

- The more breadcrumbs I threw on the ground, the more they quacked.

- Do you hear the ducks quack?