Definitions:

1. an event that fails badly or is totally ineffectual noun
   • People looked forward to the new product, but the demo was a dud.
2. an explosion that fails to occur noun
   • The mortar was a dud.
3. failing to detonate adjective
   • It was a dud rocket.
4. someone who is unsuccessful noun
   • The new goalkeeper turned out to be a dud.

Synonyms:

• flop
• misfire
• turkey

NearBy Words:

• dude
• dudeen
• dudgeon
• duds