Sinhala Dictionary definitions for keystone
keystone 🔊 /kiˈstowˌn/
keystone : කේන්ද්රශිලාව
keystone : මුදුන් ගල
keystone definition
Noun. The central or topmost stone of an arch. This in some styles is made different in size from the other voussoirs, or projects, or is decorated with carving. See Illust. of Arch.