Lewis Short
(adjective) : oppĭdānus, a, um, id.
* 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.
Charlton T. Lewis, Charles Short, A Latin Dictionary