Definitions

1. noun

a person or thing that fails to function or produce as expected.

“The fireworks failed to go off, and the dud was a disappointment to the kids.”

2. noun

a performer or comedian who fails to amuse or entertain an audience.

“The comedian was a dud, and nobody laughed at his jokes.”

3. noun

a bullet that fails to fire or penetrate its target.

“The soldier was relieved that the dud bullet did not cause any harm.”

4. adjective

unsuccessful or ineffective.

“The company’s new product was a dud, and they had to shut down operations.”

5. verb

to fail to function or produce as expected.

“The engine dud and broke down on the highway.”