— vitiation , n. — vitiator , n.
/vish"ee ayt'/ , v.t., vitiated, vitiating .
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.
[ 1525-35; vitiatus, ptp. of vitiare to spoil, der. of vitium blemish, VICE 1 + -atus -ATE 1 ]