/ Dictionary / Index U unusual: Meaning and Definition of Find definitions for: un•u•su•al Pronunciation: (un-y'zh-ul, -yzh'wul), [key] — adj. not usual, common, or ordinary; uncommon in amount or degree; exceptional: an unusual sound; an unusual hobby; an unusual response. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unusual (Thesaurus) unused unusuality Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language