noun
- something that fails to work properly or as expected
- a bomb or shell that fails to explode
Usage: informal
Usage: military
adjective
- not working; defective
Usage: informal
Examples
- The firework was a dud and never went off.
- That movie was a complete dud at the box office.
- The artillery shell turned out to be a dud.
- My phone battery is dud and won’t hold a charge.
- The new product launch was a dud for the company.
- Several dud bombs were found after the war ended.