UM

  1. (initialism) .  (philately) unmounted mint.
  2. (initialism) .  University of Miami.
  3. (initialism) .  University of Michigan.
  4. Preposition.  (alternative form of, umbe) .
  5. Interjection.  Expression of confusion or space filler in conversation. See uh.
  6. Verb.  (intransitive) To make the ''um'' sound to express confusion or hesitancy.
  7. Noun.  A micrometer.

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This entry was last updated on RefTopia from its source on 3/20/2012.