Answer:
"Antisocial" has two main meanings, depending on the context:
In everyday language:
In common usage, "antisocial" is often used to describe behavior that goes against social norms, is unfriendly, or is harmful to society. For example, someone who consistently avoids social interactions, acts in a rude or disruptive manner, or engages in activities that harm others might be labeled as antisocial in this sense.
In psychology/psychiatry:
In the field of psychology and psychiatry, "antisocial" refers to a specific personality disorder known as Antisocial Personality Disorder (ASPD). Individuals with this disorder often display a persistent pattern of disregard for the rights of others, lying, deceit, impulsivity, irritability, aggression, lack of remorse, and a failure to conform to social norms. It is important to note that the clinical term "antisocial" in this context is more specific and severe than its colloquial usage.
