The story
- Old English · inherited frommǣrstān“boundary-stone”
- Middle English · inherited frommerestone
- English todaymerestone
From Middle English merestone, merestane, from Old English mǣrstān (“boundary-stone”), equivalent to mere (“boundary”) + stone.
First known use, by meaning
- from 10th c. A stone designating a limit or boundary; a boundary stone.
Etymology from Wiktionary, CC BY-SA 4.0.