personality disorder

the condition of being unable to adapt properly to your environment with resulting emotional instability

a personality disorder characterized by amorality and lack of affect; capable of violent acts without guilt feelings (`psychopathic personality' was once widely used but was superseded by `sociopathic personality' to indicate the social aspects of the disorder, but now `antisocial personality disorder' is the preferred term)

characterized by symptoms similar to but less severe than schizophrenia

(psychiatry) a psychological disorder of thought or emotion; a more neutral term than mental illness