/ Dictionary / Index U uncommonly: Meaning and Definition of Find definitions for: un•com•mon•ly Pronunciation: (un-kom'un-lē), [key] — adv. in an uncommon or unusual manner or degree. exceptionally; outstandingly. rarely; infrequently. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: uncommonly (Thesaurus) uncommon uncommunicable Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language