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[vish-ee-eyt] /ˈvɪʃ iˌeɪt/
verb (used with object), vitiated, vitiating.
to impair the quality of; make faulty; spoil.
to impair or weaken the effectiveness of.
to debase; corrupt; pervert.
to make legally defective or invalid; invalidate:
to vitiate a claim.
1525-35; < Latin vitiātus, past participle of vitiāre to spoil, derivative of vitium blemish, vice1 + -ātus -ate1
Related forms
vitiation, noun
vitiator, noun
nonvitiation, noun
unvitiated, adjective
unvitiating, adjective
Can be confused
ameliorate, obviate, vitiate. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for vitiated
  • Any benefits from extra water supplies will be short-term, and vitiated by floods.
  • The sites themselves are neatly maintained, but the experience is vitiated by touts and illegal guides.
  • If any one thus denies the determination of natural phenomena at one such point, he has vitiated the entire scientific viewpoint.
  • The language is often tumid, and extravagant, and disfigured with ornaments which denote a vitiated taste.
  • But unfortunately, it is vitiated by a series of errors that deserve to be noted.
  • The entire purpose of the leave is vitiated if the employee recovers but is terminated or otherwise barred from returning to work.
  • Nor have they proven that the information disseminated was so pervasive that the electoral process was vitiated.
British Dictionary definitions for vitiated


verb (transitive)
to make faulty or imperfect
to debase, pervert, or corrupt
to destroy the force or legal effect of (a deed, etc): to vitiate a contract
Derived Forms
vitiable, adjective
vitiation, noun
vitiator, noun
Word Origin
C16: from Latin vitiāre to injure, from vitium a fault
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
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Word Origin and History for vitiated



1530s, from Latin vitiatus, past participle of vitiare "to make faulty, injure, spoil, corrupt," from vitium "fault, defect, blemish, crime, vice" (see vice (n.1)). Related: Vitiated; vitiating.

Online Etymology Dictionary, © 2010 Douglas Harper
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