• synonyms


[ik-skloo-zhuh n]
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  1. an act or instance of excluding.
  2. the state of being excluded.
  3. Physiology. a keeping apart; blocking of an entrance.
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Origin of exclusion

1375–1425; late Middle English < Latin exclūsiōn- (stem of exclūsiō), equivalent to exclūs(us) (past participle of exclūdere to shut out; see exclude) + -iōn- -ion
Related formsex·clu·sion·ar·y, adjectivenon·ex·clu·sion, nounpre·ex·clu·sion, nounself-ex·clu·sion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for exclusion


  1. the act or an instance of excluding or the state of being excluded
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Derived Formsexclusionary, adjective
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 exclusion


c.1400, from Latin exclusionem (nominative exclusio), noun of action from past participle stem of excludere (see exclude).

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Online Etymology Dictionary, © 2010 Douglas Harper

exclusion in Medicine


  1. Surgical isolation of a part or segment without removal from the body.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.