antisocial

Concise Oxford English Dictionary © 2008 Oxford University Press:
antisocial/antiˈsəʊʃl/

▶adjective

• 1 contrary to the customs of society and causing annoyance and disapproval in others.

  ■ Psychiatry sociopathic.

• 2 not sociable.

– derivatives
antisocially adverb.

usage: On the difference in use between antisocial, unsocial, and unsociable, see usage at unsociable.