I.a., to flow by or past (rare; perh. not ante-Aug.).
(α).
Neutr.: “infimā valle praefluit Tiberis,” Liv. 1, 45, 6: “a latere urbis quod in orientem patet,” id. 43, 31, 3: “vado incerto,” Tac. A. 12, 33: “ita ut (aquae tubo ductae) recte praefluere possint,” Inscr. Orell. 199.—
(β).
Act.: “Aufidus, Qui regna Dauni praefluit Appuli,” Hor. C. 4, 14, 26: “Tibur,” id. ib. 4, 3, 10: “Aquileiam,” Plin. 3, 18, 22, § 126; 3, 11, 16, § 102; 4, 3, 4, § 8: “Pergamum,” id. 5, 30, 33, § 126: “castra,” Tac. A. 15, 15: “Noricam provinciam,” id. ib. 2, 63.