Words at Play : In the Details: Architecture Terms Worth Looking At
Definition:
a wall of earth or stone to protect soldiers; or a low wall or railing at the edge of a platform, roof, or bridge
About the Word:
Parapet has its source in two Italian words: parare, meaning "to shield," and petto, meaning "chest." In current informal British English, to stick (or raise) your head above the parapet is to do or say something you think is important even though your action may have bad results.