See also: Appendix:Variations of "mun" English English Wikipedia has an article on:MUNWikipedia Noun MUN (plural MUNs) (education) Abbreviation of model United Nations. Proper noun MUN Abbreviation of Memorial University of Newfoundland. Anagrams Num., nmu, unm., num., numWikiwand - on Seamless Wikipedia browsing. On steroids.