/ Dictionary / Index G Gregory X: Meaning and Definition of Find definitions for: Gregory X Pronunciation: [key] (Teobaldo Visconti) c1210–76, Italian ecclesiastic: pope 1271–76. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Gregory IX Gregory XI Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language