In fortification: an indented parapet, formed by a series of rising members called cops or merlons, separated by openings called crenelles or embrasures, the soldier sheltering himself behind the merlon while he fires through the embrasure or through a loophole in the battlement.
The towering roof of heaven.
Any high wall for defense.
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.