/ Thesaurus / J Synonyms of justinian Find synonyms for: Noun1. Justinian, Justinian I, Justinian the Greatusage: Byzantine emperor who held the eastern frontier of his empire against the Persians; codified Roman law in 529; his general Belisarius regained North Africa and Spain (483-565)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: coincidence Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language