• synonyms


  1. a prefix meaning “not,” freely used as an English formative, usually with a simple negative force as implying mere negation or absence of something (rather than the opposite or reverse of it, as often expressed by un-1): nonadherence; noninterference; nonpayment; nonprofessional.
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Origin of non-

prefix representing L adv. nōn not

non obstante

[nohn ohb-stahn-te; English non ob-stan-tee]
preposition Latin.
  1. notwithstanding.
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Origin of non obstante

short for Anglo-Latin, Latin nōn obstante aliquō statūtō in contrārium any statute to the contrary notwithstanding

non placet

[non pley-sit]
  1. (especially in a church or university assembly) an expression or vote of dissent or disapproval.
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Origin of non placet

First recorded in 1580–90, non placet is from the Latin word nōn placet it is not pleasing
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for non

Contemporary Examples

Historical Examples

  • And she is, as I believe you are aware, a remarkably fine woman, with no non—'

    Little Dorrit

    Charles Dickens

  • Of this the Bard remarks “ni mad,” it was not honourable, “non bene.”

    Y Gododin


  • He merely shook his head, said "Non capisco," and inquired if I was "Prussiano."

  • Presently he looked up; she nodded and the Ah, non giunge floated from her.

    The Paliser case

    Edgar Saltus

  • Non,” replied the Russian, with the air of a man of principles.

    The Gypsies

    Charles G. Leland

British Dictionary definitions for non


  1. indicating negationnonexistent
  2. indicating refusal or failurenoncooperation
  3. indicating exclusion from a specified class of persons or thingsnonfiction
  4. indicating lack or absence, esp of a quality associated with what is specifiednonobjective; nonevent
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Word Origin

from Latin nōn not
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 non


prefix meaning "not, lack of," or "sham," 14c., from Anglo-French noun-, from Old French non-, from Latin non "not, by no means, not at all, not a," from Old Latin noenum "not one" (*ne oinom, from PIE *ne "not" + *oi-no-; see one). In some cases perhaps from Middle English non "not" (adj.), from Old English nan (see not).

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Online Etymology Dictionary, © 2010 Douglas Harper

non in Medicine


  1. Not:noninvasive.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.