Someone whose social behavior is extremely abnormal. Sociopaths are interested only in their personal needs and desires, without concern for the effects of their behavior on others. (Compare psychopath.)
sociopath so·ci·o·path (sō'sē-ə-pāth', -shē-)
n.
A person affected with an antisocial personality disorder.
sociopathy so·ci·op·a·thy (sō'sē-ŏp'ə-thē, -shē-)
n.
The behavioral pattern exhibited by sociopaths.