antisocial

adj. unfriendly, not sociable; against society's principles

Antisocial personality disorder (APD) is a psychiatric condition characterized by an individual's common disregard for social rules, norms, and cultural codes, as well as impulsive behavior, and indifference to the rights and feelings of others. Antisocial personality disorder is terminology used by the American Psychiatric Association's Diagnostic and Statistical Manual, while the World Health Organization's ICD-10 refers to Dissocial personality disorder.
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Adjective
1. shunning contact with others; "standoffish and antisocial"; "he's not antisocial; just shy"
(similar) unsociable
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"
(synonym) asocial
(similar) unsocial

adj. antisocial, unfriendly

adj. anti socialist, antisocial