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WordReference Random House Unabridged Dictionary of American English © 2024lab•a•rum (lab′ər əm),USA pronunciation n., pl. -a•ra (-ər ə).USA pronunciation - Religionan ecclesiastical standard or banner, as for carrying in procession.
- Ancient History, World Historythe military standard of Constantine the Great and later Christian emperors of Rome, bearing Christian symbols.
- Late Latin, of obscure origin, originally
- 1650–60
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