Dictionary.com
Thesaurus.com
Synonyms

dud

American  
[duhd] / dʌd /

noun

  • duds
    plural
  1. Informal. a device, person, or enterprise that proves to be a failure.

    Synonyms:
    flop, bomb, fizzle, debacle, fiasco
  2. a shell or missile that fails to explode after being fired.


dud British  
/ dʌd /

noun

  1. a person or thing that proves ineffectual or a failure

  2. a shell, etc, that fails to explode

  3. old-fashioned (plural) clothes or other personal belongings

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adjective

  1. failing in its purpose or function

    a dud cheque

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms


Etymology

Origin of dud

1815–25; special use of dud, singular of duds


Explanation

Something that doesn't work the way it's supposed to is a dud. A bomb or firework that doesn't explode is one kind of dud. A bad blind date is another kind. When a bomb fails to explode, it's a dud. A long-planned surprise party that fails miserably when the guest of honor doesn't show up is another kind of dud. You can also refer to a person as a dud, if they're an utter failure or a complete flop: "The lead actor was a total dud. He couldn't really sing or dance and he seemed nervous." In the 1800s, a dud was "a person in ragged clothing," from dudde, "cloak or mantle."

Keep Reading on Vocabulary.com

Vocabulary lists containing dud

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Arellano: Will the Third Bass-Raman debate be a classic — or a dud?

From Los Angeles Times ● Oct. 14, 2026

To no one’s surprise, it was a dud.

From Salon ● Aug. 1, 2026

But no, we can confidently report that the Great American State Fair is a big ol’ dud.

From Slate ● Jul. 1, 2026

It’s the first day of SpaceX trading, and Wall Street has high hopes it’ll provide a lot more excitement than that dud of a World Cup opener.

From MarketWatch ● Jun. 12, 2026

Gilly’s heart gave a little spurt and flopped over like a dud rocket.

From "The Great Gilly Hopkins" by Katherine Paterson

Costume designer Maya Edmond dresses Big Ant thematically: white tees when he’s trying to be good, black duds when his demons are winning and comic book-y jailbird stripes during his pivotal teenage arrest.

From Los Angeles Times ● Sep. 11, 2026

With years of data showing that people will rent and watch just about anything, Netflix was free to make a home for all the bombs and duds that it previously offered via snail mail.

From Salon ● Sep. 2, 2026

Splurging money on last-minute loans who, surprisingly, turn out to be duds.

From BBC ● Aug. 19, 2026

Lucasfilm was hit-and-miss under Kennedy—for every Star Wars success story like The Force Awakens, there were duds like Solo, a spinoff that focuses on original trilogy icon Han Solo.

From Barron's ● Jan. 16, 2026

“Makes sense to me,” said Aunt Pretty, folding up my new duds.

From "The Seven Wonders of Sassafras Springs" by Betty G. Birney

Random Word

Spin the wheel and learn a new word!

Get a word


Vocabulary.com logo
by dictionary.com

Just like flashcards, but way more fun

Don't take our word for it. Leave the boring studying behind and join VocabTrainer today. You'll learn even faster and never look back.

Take me to Vocabulary.com