burgus

I. a castle, fort, fortress (post-class.): castellum parvulum, quem burgum vocant, Veg. Mil. 4, 10: crebra per limites habitacula constituta burgos vulgo vocant, Isid. Orig. 9, 2, 99; 9, 4, 28; Cod. Just. 1, 27, 2, § 4; Cod. Th. 12, 19, 2; Sid. Carm. 22.