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  • fad
    fad
    noun
    a temporary fashion, notion, manner of conduct, etc., especially one followed enthusiastically by a group.
  • FAD
    FAD
    noun
    biochem flavin adenine dinucleotide: an ester of riboflavin with ADP that acts as the prosthetic group for many flavoproteins See also FMN
Synonyms

fad

American  
[fad] / fæd /

noun

  1. a temporary fashion, notion, manner of conduct, etc., especially one followed enthusiastically by a group.

    Synonyms:
    rage, vogue, craze

fad 1 British  
/ fæd /

noun

  1. an intense but short-lived fashion; craze

  2. a personal idiosyncrasy or whim

"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

FAD 2 British  

noun

  1. biochem flavin adenine dinucleotide: an ester of riboflavin with ADP that acts as the prosthetic group for many flavoproteins See also FMN

"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

  • faddish adjective
  • faddishness noun
  • faddism noun
  • faddist noun
  • fadlike adjective

Etymology

Origin of fad

1825–35; noun use of dial. fad to look after things, busy oneself with trifles, back formation from obsolete faddle to play with, fondle. See fiddle

Explanation

If it’s all the rage, everybody’s into it, your parents don’t get it, and teenage girls across the globe are trying to outdo each other with it, it’s officially a fad. From hairstyles to hula hoops to saying “that’s hot,” fads are known to rise to crazed levels of popularity seemingly overnight. But they fade out just as fast, leaving late adopters with outdated sayings and some seriously uncool shoes. Much like a fad itself, no one has any real idea where this word came from. But it’s still in fashion some 144 years later.

Keep Reading on Vocabulary.com

Vocabulary lists containing fad

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.

Both Lazzareschi and Diaz have more “KPop Demon Hunters”-inspired events coming up, but Tzagournis believes the peak of the fad has already passed — at least for now.

From Los Angeles Times • Apr. 29, 2026

Tim Cook steps down as Apple’s CEO, RFK Jr. furthers the peptides fad, and The Onion finally gets InfoWars.

From Slate • Apr. 25, 2026

My favorite recent social media fad is tweens and young teens designing their own countries, complete with flags, customs and governing aesthetics.

From The Wall Street Journal • Apr. 20, 2026

In the wake of an anticipated fiber craze that is expected to trump last year’s protein-maxxing dietary fad, chia seeds have become all the rage.

From Salon • Mar. 31, 2026

Briony was lost to her writing fantasies—what had seemed a passing fad was now an enveloping obsession.

From "Atonement" by Ian McEwan