Abnormal behavior may be defined as behavior that is disturbing (socially unacceptable), distressing, maladaptive (or self‐defeating), and often the result of distorted thoughts (cognitions).

What is the definition of abnormal Behaviour?

behavior that is atypical or statistically uncommon within a particular culture or that is maladaptive or detrimental to an individual or to those around that individual. Such behavior is often regarded as evidence of a mental or emotional disturbance, ranging from minor adjustment problems to severe mental disorder.

What is the best definition of abnormal behavior?

It is a behavioral pattern that violates existing social norms and that can harm people. ... It consists of behavior patterns that go against prevailing social or cultural norms. It is a rare or irregular manner in which a person acts.