Meaning of vitiate

vi•ti•ate

Pronunciation: (vish'ē-āt"), [key]
— -at•ed, -at•ing.
  1. to impair the quality of; make faulty; spoil.
  2. to impair or weaken the effectiveness of.
  3. to debase; corrupt; pervert.
  4. to make legally defective or invalid; invalidate: to vitiate a claim.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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