parapet Meaning, Definition & Usage

  1. noun a low wall along the edge of a roof or balcony
  2. noun fortification consisting of a low wall
    breastwork.

WordNet

Par"a*pet noun
Etymology
F., fr. It. parapetto, fr. parare to ward off, guard (L. parare to prepare, provide) + petto the breast, L. pectus. See Parry, and Pectoral.
Definitions
  1. (Arch.) A low wall, especially one serving to protect the edge of a platform, roof, bridge, or the like.
  2. (Fort.) A wall, rampart, or elevation of earth, for covering soldiers from an enemy's fire; a breastwork. See Illust. of Casemate.

Webster 1913