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verb (used with object)
  1. to free from or deprive of illusion, belief, idealism, etc.; disenchant.
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  1. a freeing or a being freed from illusion or conviction; disenchantment.
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Origin of disillusion

First recorded in 1590–1600; dis-1 + illusion
Related formsdis·il·lu·sion·ment, noundis·il·lu·sive [dis-i-loo-siv] /ˌdɪs ɪˈlu sɪv/, adjectiveun·dis·il·lu·sioned, adjective


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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for disillusion


  1. (tr) to destroy the ideals, illusions, or false ideas of
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noun Also: disillusionment
  1. the act of disillusioning or the state of being disillusioned
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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 disillusion


"to free or be freed from illusion," 1855, from a noun meaning "act of freeing from illusion" (1814); see dis- + illusion. Related: Disillusioned; disillusioning.

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Online Etymology Dictionary, © 2010 Douglas Harper