Origin of labarumLate Latin (from source Late Greek labaron) from uncertain or unknown; perhaps
- An ecclesiastical banner, especially one carried in processions.
- The banner adopted by Constantine I after his conversion to Christianity.
Origin of labarumLate Latin probably from alteration of Greek labrāton laurel-leaf standard from Latin laureātum neuter of laureātus adorned with laurel ; see laureate .
From Latin labarum, from Ancient Greek λαβαρόν (labaron).