Definitions
1.NounThe sloping earthen embankment behind a defensive wall.
2.NounThe level platform atop a wall, typically protected by a parapet and distinguished from the slightly higher banquette used by its defenders.
3.NounAny level base used by artillery in the field.
4.NounAny earthen embankment with a broad level top, such as those used for a canal elevated above a valley floor.