revetments

Noun

revetment (plural revetments)

1. A layer of stone, concrete, or other hard material supporting the side of an embankment.
   • Findlayson, C. E., sat in his trolley on a construction line that ran along one of the main revetments—the huge stone-faced banks that flared away north and south for three miles on either side of the river and permitted himself to think of the end.1898, Rudyard Kipling, “The Bridge-Builders”, in The Day's Work
2. An ornamental facing, as on a common masonry wall, of marble, face brick, tiles, etc.
3. An armoured building that provides protection against bombs.