To make vicious, faulty, or imperfect; to render defective; to injure the substance or qualities of; to impair; to contaminate; to spoil; as, exaggeration vitiates a style of writing; sewer gas vitiates the air.
- To reduce the value or impair the quality of.
- To corrupt morally; debase.
- To make ineffective; invalidate. See Synonyms at corrupt.