anomalous behavior

/ˌænəˈmɒləs ˈbɛhəvɪər/ · an.o.mal.ous.be.ha.vi.or

noun

Behavior that deviates from expected norms or standards, often in a way that is unusual or unexpected. The company's anomalous behavior in the financial reports raised suspicions of embezzlement.
A pattern of behavior that is inconsistent with a particular model or theory. The researchers were surprised by the anomalous behavior of the particles in the experiment, which contradicted their initial hypothesis.

Synonyms

unusual behavior deviant behavior abnormal behavior irregular behavior unpredictable behavior erratic behavior unconventional behavior atypical behavior

Antonyms

normal behavior expected behavior conventional behavior typical behavior predictable behavior regular behavior

Did you know? The term 'anomalous behavior' is often used in the fields of psychology, sociology, and computer science to describe patterns or actions that defy explanation or prediction.

Related terms

behavioral patterns anomaly deviation norm standard model theory

Written by Lexi Wordsworth, Dictionary Editor 1 lookups Added Jul 25, 2026