'Merestone' definitions:

Definition of 'merestone'

From: WordNet
noun
An old term for a landmark that consisted of a pile of stones surmounted by an upright slab [syn: merestone, meerestone, mearstone]

Definition of 'Merestone'

From: GCIDE
  • Merestone \Mere"stone`\, n. A stone designating a limit or boundary; a landmark. --Bacon. [1913 Webster]