·noun A low wall, especially one serving to protect the edge of a platform, roof, bridge, or the like.
II. Parapet ·noun A wall, rampart, or elevation of earth, for covering soldiers from an enemy's fire; a breastwork. ·see ·Illust. of Casemate.
A breast-high defence against missiles; its top is usually sloped away to the front, that the defend...
The Sailor's Word-Book
One of which the interior slope is indented with a series of vertical cavities, enabling the men sta...