The word comes ultimately from the italian parapetto.
Parapet roof define.
A parapet is a part of a roof that eliminates the danger of a flat roof while opening up a wealth of opportunities to use roof space safely and effectively.
A low wall along the edge of a roof.
Now it is a low railing or wall along the perimeter of a roof or along the edge of a bridge balcony or raised platform.
A low wall along the edge of a roof bridge etc.
By definition a parapet is a vertical wall above the roof line.
Kids definition of parapet.
A parapet is a barrier that is an extension of the wall at the edge of a roof terrace balcony walkway or other structure.
It can sometimes be only 100mm or 200mm above the roof and still be a parapet.
A wall of earth or stone to protect soldiers.
These are often decorative and extend the wall above the roofline.
Parapet originally this was a wall used to protect the ramparts of military structures.
Where extending above a roof a parapet may simply be the portion of an exterior wall that continues above the edge line of the roof surface or may be a continuation of a vertical feature beneath the roof such as a fire wall or party wall.
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The german equivalent brüstung has the same meaning.