- Also called: coping stone. a stone used to form a coping
- Also called: capstone. the stone at the top of a building, wall, etc
) or copestone (ˈkəʊpˌstəʊn
- one of a set of slabs on the top of a wall, building, etc
- (mountaineering) a chockstone occurring at the top of a gully or chimney
- a crowning achievement; peak ⇒
the capstone of his career
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