Definitions for "Parapet"
A low wall, especially one serving to protect the edge of a platform, roof, bridge, or the like.
A wall, rampart, or elevation of earth, for covering soldiers from an enemy's fire; a breastwork. See Illust. of Casemate.
As in parapet wall -the external wall is built up above the eaves with a gutter formed behind it, or mansard constructed behind it.