/ Dictionary / Index M Marathonian: Meaning and Definition of Find definitions for: Mar•a•tho•ni•an Pronunciation: (mar"u-thō'nē-un), [key] — adj. of or pertaining to Marathon. —n. a native or inhabitant of Marathon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. marathon group Marathonian bull Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language