/ Dictionary / Index G Guyon: Meaning and Definition of Find definitions for: Guy•on Pronunciation: (gwē-yôn'), [key] — n. (Jeanne Marie Bouvier de la Matte), 1648–1717, French writer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. guy Friday guyot Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language