/ Dictionary / Index J Justinian Code: Meaning and Definition of Find definitions for: Justin'ian Code' Pronunciation: [key] the body of Roman law that was codified and promulgated under Justinian I. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Justinian I Justinianian 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