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fantasize

or phan·ta·size

[fan-tuh-sahyz]
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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.
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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.
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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 fantasise

fantasize

fantasise

verb
  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
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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 fantasise

v.

artificial British English spelling of fantasize, not much attested before 1970s. For suffix, see -ize. Related: Fantasised; fantasising.

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fantasize

v.

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

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Online Etymology Dictionary, © 2010 Douglas Harper