1. A stone that is used to mark a grave
   "The family chose a simple granite headstone for their loved one";
   - gravestone, tombstone
    
2. The central building block at the top of an arch or vault
   "The headstone of the archway bore an inscription";
   - keystone, key

Derived forms: headstones

Type of: building block, memorial, monument, stone

Part of: arch, grave, tomb

Encyclopedia: Headstone, London, England