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n. pl. lab·a·ra (-ər-ə)
1. An ecclesiastical banner, especially one carried in processions.
2. The banner adopted by Constantine I after his conversion to Christianity.
[Late Latin, probably from alteration of Greek labrāton, laurel-leaf standard, from Latin laureātum, neuter of laureātus, adorned with laurel; see laureate.]
n, pl -ra (-rə)
1. (Ecclesiastical Terms) a standard or banner carried in Christian religious processions
2. (Historical Terms) the military standard bearing a Christian monogram used by Constantine the Great
3. (Military) the military standard bearing a Christian monogram used by Constantine the Great
[C17: from Late Latin, of obscure origin]
lab•a•rum(ˈlæb ər əm)
n., pl. -a•ra (-ər ə)
the military standard of Constantine the Great and later Christian emperors of Rome, bearing Christian symbols.
[1650–60; < Late Latin; of obscure orig.]