/ Dictionary / Index P Pros. Atty.: Meaning and Definition of Find definitions for: Pros. Atty. Pronunciation: [key] prosecuting attorney. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. prosateur proscenium Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language