noun

1. A person who deviates, especially from norms of social behavior.

   “He was branded as a deviant and ostracized.”

2. A thing, phenomenon, or trend that deviates from an expectation or pattern.

   “As the graph shows, the March sales trend is the deviant.”

Synonyms: heteroclite, nonconformist, abnormality, irregularity, outlier

adjective

1. Characterized by deviation from an expectation or a social standard.

   “At the trial, the extent of his deviant behavior became clear.”