Definition of mun in English:

mun

Line breaks: mun
Pronunciation: /mʌn
 
/

verb

dialect form of must1.
More example sentences
  • If they've got keys t'yon gate, they mun be on official business.

Origin

Middle English: from Old Norse muna, from the Germanic base of mind.

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Pronunciation: ˌ(h)yo͞oməˈresk
noun
a short, lively piece of music