/ Dictionary / Index J Justinianian: Meaning and Definition of Find definitions for: Jus•tin•i•a•ni•an Pronunciation: ( ju-stin"ē-ā'nē-un), [key] — adj. of or pertaining to Justinian I or the Byzantine dynasty (a.d. 518–610) named after him. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Justinian Code Justin Martyr Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language