Definitions:

1. A person who masquerades as a qualified doctor or healthcare professional but lacks the necessary qualifications and knowledge. NOUN
   • The patient realized too late that the practitioner was a quack, having promised a miraculous cure that never materialized.
2. Describes the action of making the typical duck sound. VERB
   • The ducks quack loudly in the morning.
   • The ducks quacked all night long and I could not sleep.
3. Often used to describe the typical vocalization of ducks, especially when referring to duck behaviors or when teaching young children animal sounds. NOUN
   • Despite its comical sound, the quack serves as a form of communication among ducks.
4. Refers to a fraudulent or ignorant pretender to medical skills. NOUN
   • The quack claimed his potion could cure any ailment, but it was nothing more than snake oil.
5. The characteristic sound made by a duck. NOUN
   • The quack of a duck echoed across the tranquil pond.

Synonyms:

• fake
• fraud
• impostor
• phoney
• pretender

NearBy Words:

• quack
• quack-quack
• quackery
• quackgrass