Rampart (fortification)
LENGTH OF BANK OR WALL FORMING PART OF THE DEFENSIVE BOUNDARY OF A FORTIFICATION
Bank (fortification); Defensive rampart; Rampart (castle); Ramparts (fortifications)
In fortification architecture, a rampart is a length of bank or wall forming part of the defensive boundary of a castle, hillfort, settlement or other fortified site. It is usually broad-topped and made of excavated earth and/or masonry.