Meaning of the word dud in English

What does dud mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

dud

US /dʌd/
UK /dʌd/

Noun

a thing that fails to work or is unsatisfactory

Example:
The fireworks were mostly duds.
The new product turned out to be a complete dud.

Adjective

failing to work or be effective

Example:
The bomb was a dud.
His latest movie was a real dud.