/ Dictionary / Index U unfix: Meaning and Definition of Find definitions for: un•fix Pronunciation: (un-fiks'), [key] — -fixed -fixt, -fix•ing. to render no longer fixed; unfasten; detach; loosen; free. to unsettle, as the mind, traditions, or habits. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. unfit unflappable Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language