Pronunciation: (an"tē-sō'shul, an"tī-),[key] —adj. 1. unwilling or unable to associate in a normal or friendly way with other people: He's not antisocial, just shy. 2. antagonistic, hostile, or unfriendly toward others; menacing; threatening: an antisocial act. 3. opposed or detrimental to social order or the principles on which society is constituted: antisocial behavior. 4. Psychiatry.of or pertaining to a pattern of behavior in which social norms and the rights of others are persistently violated.