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verb (used with or without object), phan·ta·sized, phan·ta·siz·ing.
  1. fantasize.
Also especially British, phan·ta·sise.


or phan·ta·size

verb (used without object), fan·ta·sized, fan·ta·siz·ing.
  1. to conceive fanciful or extravagant notions, ideas, suppositions, or the like (often followed by about): to fantasize about the ideal job.
verb (used with object), fan·ta·sized, fan·ta·siz·ing.
  1. to create in one's fancy, daydreams, or the like; imagine: to fantasize a trip through space.
Also especially British, fan·ta·sise.

Origin of fantasize

First recorded in 1925–30; fantas(y) + -ize
Related formsfan·ta·siz·er, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for phantasize



  1. (when tr, takes a clause as object) to conceive extravagant or whimsical ideas, images, etc
  2. (intr) to conceive pleasant or satisfying mental images
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for phantasize



1926, from fantasy + -ize. Related: Fantasized; fantasizing. An earlier verb was fantasticate (c.1600).

Online Etymology Dictionary, © 2010 Douglas Harper