/ Dictionary / Index G Gratian: Meaning and Definition of Find definitions for: Gra•ti•an Pronunciation: (grā'shē-un, -shun), [key] — n. a.d. 359–383, Roman emperor 375–383. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Gratiae graticule 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