perversion

Universal Words noun [U,C] 1 behaviour that most people think is not normal or acceptable, especially when it is connected with sex; an example of this type of behaviour: sexual perversion * sadomasochistic perversions 2 the act of changing sth that is good or right into sth that is bad or wrong; the result of this: the perversion of innocence / justice * Her account was a perversion of the truth.