behaviour that most people think is not normal or acceptable, especially when it is connected with sex; an example of this type of behaviour 反常行为；（性）变态 sexual perversion 性变态 sadomasochistic perversions 施虐受虐的变态行为
the act of changing something that is good or right into something that is bad or wrong; the result of this 颠倒；歪曲；颠倒是非
Word Originlate Middle English: from Latin perversio(n-), from the verb pervertere ‘turn about’, from per- ‘thoroughly, to ill effect’ + vertere ‘to turn’.