Rampart

Webster's Dictionary of the English Language

·vt To surround or protect with, or as with, a rampart or ramparts.

II. Rampart ·noun That which fortifies and defends from assault; that which secures safety; a defense or bulwark.

III. Rampart ·noun A broad embankment of earth round a place, upon which the parapet is raised. It forms the substratum of every permanent fortification.