define antisocial
1. denoting behavior that violates the rights of others, societal mores, or the law. 2. denoting the specific personality traits seen in antisocial personality disorder. antisocial personality disorder a personality disorder characterized by a conspicuous disregard for the rights and needs of others. Antisocial behavior begins before the age of 15 and includes such behaviors as truancy, delinquency, theft, and vandalism.