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

Nearby words

  1. facultative hyperopia,
  2. facultative parasite,
  3. faculties,
  4. faculty,
  5. faculty of advocates,
  6. fadden,
  7. faddish,
  8. faddist,
  9. faddy,
  10. fade

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

Related formsfad·like, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for fad

British Dictionary definitions for fad


noun informal

an intense but short-lived fashion; craze
a personal idiosyncrasy or whim
Derived Formsfaddish, adjectivefaddishness, nounfaddism, nounfaddist, noun

Word Origin for fad

C19: of uncertain origin



biochem flavin adenine dinucleotide: an ester of riboflavin with ADP that acts as the prosthetic group for many flavoproteinsSee 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

Word Origin and History for fad



1834, "hobby, pet project;" 1881 as "fashion, craze," perhaps shortened from fiddle-faddle. Or perhaps from French fadaise "trifle, nonsense," ultimately from Latin fatuus "stupid."

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for fad



flavin adenine dinucleotide

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.