the top stone layer of a retaining wall, pier, abutment, wing wall, and so forth that projects beyond the surface of the masonry below The top surface is usually battered (washed) to prevent the accumulation of rain or other moisture
the piece of material used to cover the top of a wall and protect it from the elements It can be constructed from metal, masonry, or stone
a course of stone laid with a projection beyond the general surface of the masonry below it and forming the topmost portion of a wall; a course of stone capping the curved or V shaped extremity of a pier, providing a transition to the pier head proper, when so used it is commonly termed the "starling coping," "nose coping," the "cutwater coping" or the "pier extension coping"
The cap or top lip on the pool or spa wall that provides a finished edge around the pool or spa It can be formed, cast in place or precast, or prefabricated of extruded aluminum or rigid vinyl It may also be part of the system that secures a vinyl liner to the top of the pool wall