Source : Webster's Revised Unabridged Dictionary (1913)

Antisocial \An`ti*so"cial\, a.
   Tending to interrupt or destroy social intercourse; averse to
   society, or hostile to its existence; as, antisocial
   principles.

Source : WordNet®

antisocial
     adj 1: shunning contact with others; "standoffish and antisocial";
            "he's not antisocial; just shy"
     2: unwilling or unable to conform to normal standards of social
        behavior; "criminal behavior or conduct that violates the
        rights of other individuals is antisocial"; "crimes...and
        other asocial behavior" [syn: {asocial}]