[kwak] 
| 1. | the harsh, throaty cry of a duck or any similar sound. |
| 2. | to utter the cry of a duck or a sound resembling it. |
[kwak] | 1. | a fraudulent or ignorant pretender to medical skill. |
| 2. | a person who pretends, professionally or publicly, to skill, knowledge, or qualifications he or she does not possess; a charlatan. |
| 3. | being a quack: a quack psychologist who complicates everyone's problems. |
| 4. | presented falsely as having curative powers: quack medicine. |
| 5. | of, pertaining to, or befitting a quack or quackery: quack methods. |
| 6. | to treat in the manner of a quack. |
| 7. | to advertise or sell with fraudulent claims. |
| quack 1 (kwāk) 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.] quack'y adj. |
| quack 2 (kwāk) n.
intr.v. quacked, quack·ing, quacks To act as a medical quack or a charlatan. [Short for quacksalver.] quack'er·y n., quack'ish adj., quack'ish·ly adv. |
quack (kwāk)
n.
An untrained person who pretends to be a physician and dispenses medical advice and treatment.
A charlatan.
