verb (used with object), vi·ti·at·ed, vi·ti·at·ing.
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.
Origin of vitiate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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
Word Origin for vitiate
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
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