Of or pertaining to a deviation; characterized by deviation from an expectation or a social standard. (adjective)
A person who deviates, especially from norms of social behavior. (noun)
A thing, phenomenon, or trend that deviates from an expectation or pattern. (noun)
Examples of word deviant
Late Friday, the military rulers issued a stern warning that they will crack down on what they called "deviant groups," which they blamed for a spike in crime and violence.
Last night the military rulers issued a stern warning that they would crack down on what they called "deviant groups", which they blamed for an increase in crime and violence.
Thus you have a feedback loop in which prejudice against those identifiable as deviant is validated by the very disgust that motivates it, and propagating that prejudice is validated by the pride that results.
Homosexuals and heterosexuals are both natural people, with no difference between them in humanity, make or nature … The real deviant is the one who is always trying to oust the other.
By accepting diversity we challenge these principles on which the deviant is excluded as abnormal, contaminating.