videodisk: a digital recording (as of a movie) on an optical disk that can be played on a computer or a television set
object: a tangible and visible entity; an entity that can cast a shadow
antisocial personality disorder: 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lack of affect; capable of violent acts without guilt feelings (`psychopathic personality' was once widely used but was superseded by `sociopathic personality' to indicate the social aspects of the disorder, but now `antisocial personality disorder' is the preferred term)