copestone Syllabification: (cope·stone)Pronunciation: /ˈkōpˌstōn/Definition of copestone noun a flat stone forming part of the coping of a wall. the highest stone in a building, wall, or structure. a finishing touch or crowning achievement. Origin: mid 16th century: from cope2 + stonecopestone in other Oxford dictionaries Definition of copestone in the British & World English dictionary
