I.the expiatory procession round the city of Rome, at which sacrifices were offered (v. the preced.); Serv. ad Verg. E. 3, 77; Paul. ex Fest. p. 17 Müll.: “lustrata urbs, cantata carmina, amburbium celebratum, ambarvalia promissa,” Vop. Aur. 20 (described in Luc. 1, 592 sq.).
amb-urbĭum , ii, n. urbs,