Definitions for vitiation
nullification by the destruction of the legal force; rendering null
"the vitiation of the contract"
a reduction in the value, or an impairment in the quality of something
an abolition or abrogation
Origin: vitiare, to spoil or damage
the act of vitiating, or the state of being vitiated; depravation; corruption; invalidation; as, the vitiation of the blood; the vitiation of a contract