What is a revetmeant?

Answer 1

A revetment, I think you mean, has several different meanings for different professions. In stream restoration, river engineering, and/or coastal management, revetments are sloped-like structures which are on banks or cliffs, thus allowing for energy to be absorbed by incoming water. Revetments, in military engineering, they are sloped like structures that are made to secure an area from harm such as bombing or gun shooting. Then, in architecture, they are different structures which are normally vertical and used to retain and sometimes decorate a wall. Typically, river revetments are used to protect against erosion.