a long mound of earth, stone, or similar material, usually built for purposes such as to hold back or store water, for protection from weather or enemies, or to support a road or railway.
A fortified place; a large and permanent fortification, sometimes including a town; for example a fort, a castle; a stronghold; a place of defense or security.
A position that, if obtained by the weaker side, will prevent penetration by the opposing side, generally achieving a draw.
To furnish with a fortress or with fortresses; to guard, to fortify.