un um-yum • un2 · · · Info · Definitions · Characters · · un · · Text Latin · · Script 2 · · Length 1 · · Syllables Definitions · · · (noun) an organization of independent states formed in 1945 to promote international peace and security. Synonyms: United Nations, UN. · · Noun Definition 1 Characters · · n latin small letter n U+006E u latin small letter u U+0075