fantasy /fan″təsē/ [Gk, phantasia, imagination] , 1. the unrestrained free play of the imagination; fancy. 2. a mental image, which may be distorted or grotesque, that is often the result of the action of drugs or a disease of the central nervous system. 3. the mental process of transforming undesirable experiences into imagined events or into a sequence of ideas in order to fulfill an unconscious wish, need, or desire or to give expression to unconscious conflicts, such as a daydream.
