/ Dictionary / Index L labarum: Meaning and Definition of Find definitions for: lab•a•rum Pronunciation: (lab'ur-um), [key] — pl. -a•ra an ecclesiastical standard or banner, as for carrying in procession. the military standard of Constantine the Great and later Christian emperors of Rome, bearing Christian symbols. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Laban dance notation system labdanum Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language