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illusory

[ih-loo-suh-ree, -zuh-] /ɪˈlu sə ri, -zə-/
adjective
1.
causing illusion; deceptive; misleading.
2.
of the nature of an illusion; unreal.
Origin
1590-1600
1590-1600; < Late Latin illūsōrius, equivalent to illūd(ere) to mock, ridicule (see illusion) + -tōrius -tory1
Related forms
illusorily, adverb
illusoriness, noun
unillusory, adjective
Can be confused
elusive, illusory.
Synonyms
1. fallacious, specious, false. 2. imaginary; visionary, fancied.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for illusoriness

illusory

/ɪˈluːsərɪ/
adjective
1.
producing, produced by, or based on illusion; deceptive or unreal
Derived Forms
illusorily, illusively, adverb
illusoriness, illusiveness, noun
Usage note
Illusive is sometimes wrongly used where elusive is meant: they fought hard, but victory remained elusive (not illusive)
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
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Word Origin and History for illusoriness

illusory

adj.

1590s, from French illusorie, from Late Latin illusorius "ironical, of a mocking character," from illus-, past participle stem of Latin illudere "mock at," literally "to play with," from assimilated form of in- "at, upon" (see in- (2)) + ludere "to play" (see ludicrous).

Online Etymology Dictionary, © 2010 Douglas Harper
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