(especially in fortification) a retaining wall or facing of masonry or other material, supporting or protecting a rampart, wall, etc. (尤指筑垦加固)护墙;砖石(或其他材料)保护层 ■a barricade of earth or sandbags set up to provide protection from blast or to prevent aircraft from overrunning when landing (防轰炸或防飞机降落时越界)挡土,沙袋障壁
语源
late 18th cent.: from French revêtement, from the verb revêtir (see revet)