Parapet [ peh · ruh · pet ]
A low protective wall along the edge of a roof, bridge, or other high structure that prevents people from falling down. Orginally it was developed to extend protection to soldiers in forts.
Explanation
Technical Meaning: Extension of the wall above the roof for safety. In architecture, it’s a functional extension of a wall, hiding rooftop elements.
Simple Meaning: It is basically a barrier extension of a wall at the edge of a roof, terrace, balcony, walkway or other structure
Definition in One Word: Barrier
Courtesy - Image1