from The American Heritage® Dictionary of the English Language, 4th Edition
- interj. Used to express doubt or uncertainty or to fill a pause when hesitating in speaking.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- prep. Alternative form of umbe.
- interj. Expression of confusion or space filler in conversation. See uh.
- v. To make the um sound to express confusion or hesitancy.
- n. Alternative spelling of µm.
from The Century Dictionary and Cyclopedia
- n. Same as om.
- n. A prefix of Anglo-Saxon and Scandinavian origin, meaning ‘around, about,’ cognate with ambi- and amphi-. It was formerly common, but is now wholly obsolete, except in a few Scotch words.
From Middle English, from Old Norse um, umb ("around, about"), from Proto-Germanic *umbi (“around”), from Proto-Indo-European *ambʰi- (“by, around”). Cognate with Old English ymbe ("around"). More at umbe. (Wiktionary)
This definition is lacking an etymology or has an incomplete etymology. You can help Wiktionary by giving it a proper etymology. (Wiktionary)
A Latin-script rendering of µm. (Wiktionary)