[ fa-stid-ee-uhs, fuh- ]
See synonyms for: fastidiousfastidiouslyfastidiousness on

  1. excessively particular, critical, or demanding; hard to please: a fastidious eater.

  2. requiring or characterized by excessive care or delicacy; painstaking.

Origin of fastidious

1375–1425; late Middle English <Latin fastīdiōsus squeamish, equivalent to fastīdi(um) lack of appetite, disgust, perhaps by syncope of *fastutīdium (fastu-, combining form of fastus pride, conceit + -tīdium combining form of taediumtedium) + -ōsus-ous

synonym study For fastidious

1. See particular.

Other words from fastidious

  • fas·tid·i·ous·ly, adverb
  • fas·tid·i·ous·ness, noun
  • hy·per·fas·tid·i·ous, adjective
  • hy·per·fas·tid·i·ous·ly, adverb
  • hy·per·fas·tid·i·ous·ness, noun
  • non·fas·tid·i·ous, adjective
  • non·fas·tid·i·ous·ly, adverb
  • non·fas·tid·i·ous·ness, noun
  • o·ver·fas·tid·i·ous, adjective
  • o·ver·fas·tid·i·ous·ly, adverb
  • o·ver·fas·tid·i·ous·ness, noun
  • ul·tra·fas·tid·i·ous, adjective
  • ul·tra·fas·tid·i·ous·ly, adverb
  • ul·tra·fas·tid·i·ous·ness, noun
  • un·fas·tid·i·ous, adjective
  • un·fas·tid·i·ous·ly, adverb
  • un·fas·tid·i·ous·ness, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use fastidious in a sentence

  • The alien picked his way fastidiously through the noxious debris to the end of the long room.

    Star Born | Andre Norton
  • He was of robust carriage, of refined manners, fastidiously dressed, and very rich.

    The Reign of Greed | Jose Rizal
  • He was born in the lap of a society daintily intellectual and fastidiously cultivated.

  • Some were left, as though the thief had fastidiously made his selection, scorning to trouble himself with anything but the best.

    The Second Latchkey | Charles Norris Williamson and Alice Muriel Williamson
  • God might come walking lightly in and perhaps seat himself fastidiously in my chastest chair.

    I, Mary MacLane | Mary MacLane

British Dictionary definitions for fastidious


/ (fæˈstɪdɪəs) /

  1. very critical; hard to please

  2. excessively particular about details

  1. exceedingly delicate; easily disgusted

Origin of fastidious

C15: from Latin fastīdiōsus scornful, from fastīdium loathing, from fastus pride + taedium weariness

Derived forms of fastidious

  • fastidiously, adverb
  • fastidiousness, noun

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