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Definition of mun

mun

/mʌn/
mun

Plural:muns
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mun Lexical Profile

mun Game Scores & Validity

• noun

1

An educational simulation or academic activity in which students learn about diplomacy and international relations, standing for Model United Nations.

Example

"She joined the school's mun club to improve her public speaking and debate skills."


2

The real person who writes or controls a fictional character in online text-based roleplaying games.

Example

"The mun posted a quick out-of-character update to say they would be away for the weekend."


3

British A man, fellow, or friend.

Example

"He's a good mun when you get to know him."

Synonyms
View all synonyms for mun

• verb

1

Scottish To be obliged or required to perform an action (used as a dialectal auxiliary verb meaning 'must').

Example

"Ah well, I mun leave you to your work now."

Word Nuance & Usage

As a modal verb, 'mun' is highly dialectal and restricted to Northern England, Wales, and Scotland, functioning identically to 'must'. In modern internet culture, it serves as a distinct slang noun derived from 'mundane' to separate a roleplayer from their fictional character.

• Rhymes for mun

Word Origin & Etymology

The dialectal verb stems from Old Norse 'munu' (will, must). The dialectal noun is a regional variant of 'man'. In internet slang, it is a clipping of 'mundane', originally used in science fiction and fantasy fandoms to denote the real, non-magical world.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Mun. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/mun
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