Pronunciation: (fan'tu-sīz"), [key]
—v., -sized, -siz•ing.
to conceive fanciful or extravagant notions, ideas, suppositions, or the like (often fol. by about): to fantasize about the ideal job.
to create in one's fancy, daydreams, or the like; imagine: to fantasize a trip through space. Also,phantasize. Also, esp. Brit.,fan'ta•sise".
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.