Found 2 items, similar to copestone.
English → English (WordNet) Definition: copestone copestone n 1: a final touch; a crowning achievement; a culmination [syn: finishing touch , capstone] 2: a stone that forms the top of wall or building [syn: capstone, coping stone, stretcher]
English → English (gcide) Definition: Copestone Copestone \Cope"stone`\, n. (Arch.) A stone for coping. See Coping. [1913 Webster]