n. The characteristic sound uttered by a duck. intr.v. quacked, quack·ing, quacks To utter the characteristic sound of a duck. [Middle English quek, of imitative origin.] quacky adj. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
n. 1. An untrained person who pretends to be a physician and dispenses medical advice and treatment. 2. A charlatan; a mountebank. adj. Relating to or characteristic of a quack: a quack cure. intr.v. quacked, quack·ing, quacks To act as a medical quack or a charlatan. [Short for QUACKSALVER.] quacker·y n. quackish adj. quackish·ly adv. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.