Try Our Apps


90s Slang You Should Know


[fach-oo-uh s] /ˈfætʃ u əs/
foolish or inane, especially in an unconscious, complacent manner; silly.
unreal; illusory.
Origin of fatuous
1625-35; < Latin fatuus silly, foolish, idiotic; see -ous
Related forms
fatuously, adverb
fatuousness, noun
1. dense, dull, dim-witted. See foolish. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
Examples from the Web for fatuous
Contemporary Examples
Historical Examples
  • One of the chappies burst into a fatuous laugh once more at this remark.

    Hilda Wade Grant Allen
  • We have to love before we can serve, but it is fatuous to love blindly.

    Child and Country Will Levington Comfort
  • But it must not attempt in fatuous recklessness to make over humanity on the pattern of absolute equality.

    Right Above Race Otto Hermann Kahn
  • He passed from fatuous credulity to equally fatuous distrust.

  • He was watching the operation with what he began to fear was fatuous imbecility.

British Dictionary definitions for fatuous


complacently or inanely foolish
Derived Forms
fatuously, adverb
fatuousness, noun
Word Origin
C17: from Latin fatuus; related to fatiscere to gape
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
Cite This Source
Contemporary definitions for fatuous

illusory; delusive

Word Origin

Latin fatuus 'foolish''s 21st Century Lexicon
Copyright © 2003-2014, LLC
Cite This Source
Word Origin and History for fatuous

c.1600, from Latin fatuus "foolish, insipid, silly;" of uncertain origin (Buck suggests originally "stricken" in the head). Related: Fatuously; fatuousness.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source

Word of the Day

Difficulty index for fatuous

Some English speakers likely know this word

Word Value for fatuous

Scrabble Words With Friends

Nearby words for fatuous