verb (used with object), vi·ti·at·ed, vi·ti·at·ing.
Origin of vitiate
Examples from the Web for vitiate
The result will be provisions that are watered down or loopholes that vitiate key provisions altogether.
The king was among the first to vitiate his oath, and break the Covenant.Sketches of the Covenanters|J. C. McFeeters
Many stories told of Justinian are obviously overdrawn and dictated by inventive malice, and these vitiate the entire narrative.Women of Early Christianity|Alfred Brittain
But the insertion by the payee of the words "interest" after the making of a note by authority of maker will not vitiate it.Putnam's Handy Law Book for the Layman|Albert Sidney Bolles
We hope the fact that Train has dropped us will not vitiate these promises.The Life and Work of Susan B. Anthony (Volume 1 of 2)|Ida Husted Harper
The atmosphere cannot enter the blowing valve, because it opens outwards, so that no air can enter to vitiate the vacuum.The Steam Engine Explained and Illustrated (Seventh Edition)|Dionysius Lardner