/ Dictionary / Index U unset: Meaning and Definition of Find definitions for: un•set Pronunciation: (un-set'), [key] — adj. not set; not solidified or made firm, as concrete or asphalt. (of a gemstone) not mounted in a setting. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Unser unsettle Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language