Dictionary.com

un

or 'un

[ uhn ]
/ ən /
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pronoun Dialect.
one: young uns; He's a bad un.
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Other definitions for un (2 of 4)

UN

or U.N.


abbreviation

Other definitions for un (3 of 4)

un-1

a prefix meaning “not,” freely used as an English formative, giving negative or opposite force in adjectives and their derivative adverbs and nouns (unfair; unfairly; unfairness; unfelt; unseen; unfitting; unformed; unheard-of; un-get-at-able), and less freely used in certain other nouns (unrest; unemployment).
Compare un-2.

Origin of un-

1
Middle English un-, on-,Old English; cognate with Dutch on-,Gothic, German un-,Old Norse ū-, ō-; akin to Latin in-,Greek an-, a-.See a-6, an-1, in-3

synonym study for un-

See in-3.

Other definitions for un (4 of 4)

un-2

a prefix freely used in English to form verbs expressing a reversal of some action or state, or removal, deprivation, release, etc. (unbend; uncork; unfasten, etc.), or to intensify the force of a verb already having such a meaning (unloose).
Compare un-1.

Origin of un-

2
Middle English, Old English un-, on-; cognate with Gothic and-,Dutch ont-,German ent-; akin to Latin ante,Greek antí;cf. ante-, anti-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use un in a sentence

British Dictionary definitions for un (1 of 4)

'un

un

/ (ən) /

pronoun
a spelling of one that's a big 'un

usage for 'un

This spelling is intended to reflect a dialectal or informal pronunciation

British Dictionary definitions for un (2 of 4)

UN

abbreviation for
United Nations

British Dictionary definitions for un (3 of 4)

un-1

prefix
(freely used with adjectives, participles, and their derivative adverbs and nouns: less frequently used with certain other nouns) not; contrary to; opposite ofuncertain; uncomplaining; unemotionally; untidiness; unbelief; unrest; untruth

Word Origin for un-

from Old English on-, un-; related to Gothic on-, German un-, Latin in-

British Dictionary definitions for un (4 of 4)

un-2

prefix forming verbs and verbal derivatives
denoting reversal of an action or stateuncover; untangle
denoting removal from, release, or deprivationunharness; unman; unthrone
(intensifier)unloose

Word Origin for un-

from Old English un-, on-; related to Gothic and-, German ent-, Latin ante
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 un

un-

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