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  • un
    un
    pronoun
    one.
  • UN
    UN
    abbreviation
  • un-
    un-
    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 ).
  • 'un
    'un
    pronoun
    a spelling of one

un

1 American  
[uhn] / ən /
Or 'un

pronoun

Dialect.
  1. one.

    young uns; He's a bad un.


UN 2 American  
Or U.N.

abbreviation

  1. United Nations.


un- 3 American  
  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 ).


un- 4 American  
  1. 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 ).


un- 1 British  

prefix

  1. denoting reversal of an action or state

    uncover

    untangle

  2. denoting removal from, release, or deprivation

    unharness

    unman

    unthrone

  3. (intensifier)

    unloose

"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

UN 2 British  

abbreviation

  1. United Nations

"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

'un 3 British  
/ ən /

pronoun

  1. a spelling of one

    that's a big 'un

"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

un- 4 British  

prefix

  1. (freely used with adjectives, participles, and their derivative adverbs and nouns: less frequently used with certain other nouns) not; contrary to; opposite of

    uncertain

    uncomplaining

    unemotionally

    untidiness

    unbelief

    unrest

    untruth

"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

Usage

This spelling is intended to reflect a dialectal or informal pronunciation

Synonym Usage

See in- 3.

Etymology

Origin of un-3

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

Origin of un-4

Middle English, Old English un-, on-; cognate with Gothic and-, Dutch ont-, German ent-; akin to Latin ante, Greek antí; cf. ante-, anti-

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Nerves crept in, and as the match entered extra time, Spain began to fear that this final would go down as un robo, a robbery.

From The Wall Street Journal Jul. 19, 2026

Boris Johnson, who was prime minister at the time, told the French they should "prenez un grip" and "donnez-moi un break".

From BBC Jul. 7, 2025

Living in Paris for a year certainly had its share of stresses, mostly because my French language skills never really advanced beyond me saying, Je parle français un petit peu, before switching to English.

From Slate Jan. 6, 2025

“Then en un abrir y cerrar de ojos — in a quick second — I’m here.”

From Los Angeles Times Jun. 3, 2024

As time went on, the concern un hooked itself from the fear and took on a life of its own.

From "Little Fires Everywhere" by Celeste Ng

The pair were detained after the president put pressure on the UN to hand them over.

From BBC Aug. 30, 2026

"We haven't seen a mountain hazard event like this for a very, very long time," Kamal Kishore, head of the UN Office for Disaster Risk Reduction, told the press conference.

From Barron's Aug. 28, 2026

UN aid chief Tom Fletcher said on X that the United Nations was "moving at speed to save lives".

From Barron's Aug. 28, 2026

All of social media should be designed to be safe for children, the UN human rights chief has said after Meta settled a massive court case in the US.

From BBC Aug. 27, 2026

He said I should go to the UN compound, just outside Kakuma.

From "Lost Boy, Lost Girl" by John Bul Dau

What fascinating characters “The English” has at the margins quickly cycle in and out of the miniseries — bad men and women whose motivations and backgrounds remain un- or underexplored.

From Los Angeles Times Nov. 11, 2022

The standard for each of you is internal and about you alone: Is a particular accommodation for someone else comfortable or un-?

From Washington Post Oct. 2, 2022

All of which is to say that in ways both subtle and not, intentional and un-, he has complicated his relationship with audiences, elaborated and often inverted the idea of Matt Damon.

From New York Times Jul. 27, 2021

Along with the vaccine rollout, some states have already been nixing restrictions, and the un- or semi-vaccinated among us are getting a little laxer with our safety calculations.

From Slate Apr. 6, 2021

To avoid misunderstanding, use another word to describe an un- lucky accident. fulsome.

From "Woe Is I" by Patricia T. O'Conner

The young ’un is Trey McKinney, a wiry prodigy who broke into Elite Series fishing in his teens and has twice finished runner-up for Angler of the Year.

From The Wall Street Journal Aug. 29, 2026

Mr Morris explained: "I said to my partner 'That looks like the couple that were in the news', and she said 'She's definitely got something under that coat. It may be a little 'un'."

From BBC Jan. 30, 2024

“I can tell a wrong ‘un a mile away.”

From Los Angeles Times Jul. 24, 2022

In French, it’s called ‘un sot-l’y-laisse’—i.e., only an idiot leaves it behind.”

From Fox News Jul. 24, 2020

“But how can a pore urchin dump un on ter noase? When ee ha’nt got nothing to dump with, nor way to hold ’un?

From "The Once and Future King" by T. H. White

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