Source: The Collaborative International Dictionary of English v.0.48
Headstone \Head"stone`\ (-st[=o]n`), n.
1. The principal stone in a foundation; the chief or corner
stone. --Ps. cxviii. 22.
[1913 Webster]
2. The stone at the head of a grave.
[1913 Webster]
headstone
n 1: the central building block at the top of an arch or vault
[syn: keystone, key]
2: a stone that is used to mark a grave [syn: gravestone, tombstone]