/ Dictionary / Index U unprison: Meaning and Definition of Find definitions for: un•pris•on Pronunciation: (un-priz'un), [key] — v.t. to release from prison. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. unprintable unprizable Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language