An antisocial person is “one opposed to the established society, one who shuns company and defies or breaks society’s rules.” An asocial person simply “doesn’t get on in society and avoids mixing with others.” An unsociable person is “not congenial and neither seeks nor tolerates the company of others.” An unsocial person is either “one who does not seek society or one who actively avoids or hates it.” In short unsocial overlaps nearly all these others. Nonsocial is often used with behavior to indicate “having no social quality or character,” and so “uninterested in society or in socializing.” All these words are Standard.
