/ Dictionary / Index G Geoffrey of Monmouth: Meaning and Definition of Find definitions for: Geof'frey of Mon'mouth Pronunciation: [key] 1100?–1154, English chronicler. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Geoffrey geog. Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language