/ Dictionary / Index P prison: Meaning and Definition of Find definitions for: pris•on Pronunciation: (priz'un), [key] — n. a building for the confinement of persons held while awaiting trial, persons sentenced after conviction, etc. See any place of confinement or involuntary restraint. imprisonment. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: prison (Thesaurus) prism spectrometer prison camp Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language