parapet

Etymology

From Middle French parapet, from Italian parapetto.

noun

1. A low protective wall.
   Coordinate term: railing
   Engineers will be closely checking the bridge for damage beyond the obvious smashed parapets. August 26 2020, “Mid-September before line reopens, says Network Rail”, in Rail, page 11
2. Part of a perimeter that extends above the roof.
   Maccario, it was evident, did not care to take the risk of blundering upon a picket, and a man led them by twisting paths until at last the hacienda rose blackly before them. Appleby could see it dimly, a blur of shadowy buildings with the ridge of roof parapet alone cutting hard and sharp against the clearing sky. 1907, Harold Bindloss, chapter 26, in The Dust of Conflict
3. (military) A fortification consisting of a wall.