in DSM–IV–TR and DSM–5, a personality disorder with the following characteristics: (a) a long-standing pattern of grandiose self-importance and an exaggerated sense of talent and achievements; (b) fantasies of unlimited sex, power, brilliance, or beauty; (c) an exhibitionistic need for attention and admiration; (d) either cool indifference or feelings of rage, humiliation, or emptiness as a response to criticism, indifference, or defeat; and (e) various interpersonal disturbances, such as feeling entitled to special favors, taking advantage of others, and inability to empathize with the feelings of others.

in DSM–IV–TR and DSM–5, a sleep disorder characterized by the repeated occurrence of frightening dreams that lead to awakenings from sleep.