/ Dictionary / Index G Gregory III: Meaning and Definition of Find definitions for: Gregory III Pronunciation: [key] — Saint, died a.d. 741, pope 731–741. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Gregory II Gregory IV Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language