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.

Origin of non-

prefix representing L adv. nōn not

Definition for non (2 of 3)

non obstante
[ nohn ohb-stahn-te; English non ob-stan-tee ]
/ noʊn oʊbˈstɑn tɛ; English nɒn ɒbˈstæn ti /

preposition Latin.

Origin of non obstante

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

Definition for non (3 of 3)

non placet
[ non pley-sit ]
/ nɒn ˈpleɪ sɪt /


(especially in a church or university assembly) an expression or vote of dissent or disapproval.

Origin of non placet

First recorded in 1580–90, non placet is from the Latin word nōn placet it is not pleasing Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for non

British Dictionary definitions for non



indicating negationnonexistent
indicating refusal or failurenoncooperation
indicating exclusion from a specified class of persons or thingsnonfiction
indicating lack or absence, esp of a quality associated with what is specifiednonobjective; nonevent

Word Origin for non-

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

Medical definitions for non



The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.