/ Dictionary / Index A Adrian III: Meaning and Definition of Find definitions for: Adrian III Pronunciation: [key] Italian ecclesiastic: pope a.d. 884–885. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Adrian II Adrian IV Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language