The towering roof of heaven.
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.
Any high wall for defense.
Part of a perimeter that extends above the roof.
A fortification consisting of a wall.
A low protective wall.
Hyponym: balustrade