ANTEBELLUM Meaning of ANTEBELLUM in English an ‧ te ‧ bel ‧ lum /ˌæntiˈbeləm/ BrE AmE adjective [only before noun] existing before a war, especially the American Civil War:an antebellum plantation Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012