/ Dictionary / Index A Agathon: Meaning and Definition of Find definitions for: Ag•a•thon Pronunciation: (ag'u-thon"), [key] — n. c450–c400 b.c., Greek poet and dramatist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Agathocles agatize Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language