fantasy

1 obsolete :  hallucination

2 :  fancy; especially :  the free play of creative imagination

3 :  a creation of the imaginative faculty whether expressed or merely conceived: such asa :  a fanciful design or invention a fantasy of delicate traceryb :  a chimerical or fantastic notion His plans are pure fantasy.c :  fantasia 1 the organ fantasy of Johannes Brahmsd :  imaginative fiction featuring especially strange settings and grotesque characters spent the summer reading fantasy —called also fantasy fiction

4 :  caprice served to fulfill the king's fantasies

5 :  the power or process of creating especially unrealistic or improbable mental images in response to psychological need an object of fantasy; also :  a mental image or a series of mental images (such as a daydream) so created sexual fantasies

6 often attributive :  a coin usually not intended for circulation as currency and often issued by a dubious authority (such as a government-in-exile)