The meaning of QUACK is to make the characteristic cry of a duck. How to use quack in a sentence.

QUACK definition: the harsh, throaty cry of a duck or any similar sound. See examples of quack used in a sentence.

2 days ago · The word “quack” has a surprisingly rich history rooted in Dutch street markets and patent medicine scams. Here’s how it became shorthand for medical fraud.

QUACK definition: 1. to make the usual sound of a duck: 2. a person who dishonestly pretends to have medical skills…. Learn more.