Charlton T. Lewis, Charles Short, A Latin Dictionary

I.of or in a town other than Rome (since urbanus signifies, of Rome, from the capital); sometimes in a depreciating sense, opp. to urbanus, of or belonging to a small town, provincial (class.): “senex quidam oppidanus,” Cic. de Or. 2, 59, 240: “oppidanum et inconditum genus dicendi,” id. Brut. 69, 242: “lascivia,” Tac. A. 14, 17.—Subst.: oppĭdānus , i, m., a townsman: “oppidani domus,” Liv. 29, 9, 2.—In plur.: oppĭdāni , ōrum, m., the inhabitants of a town other than Rome, townsmen, townsfolk (esp. when besieged), Caes. B. G 2, 33; 7, 12; 13; 58; Liv. 36, 25.