1) A stone marking a point on a boundary, either found in situ or moved there following an agreement.
1630 William Wharton ... by consent of both parties did fixe twoo greate stone for bounders, York. In 1517, two messuages with gardens in Threshfield were closed with olde walles and mered with two grett mere stones. An enclosure in Hepworth was said to be devided and meared forth in 1659. The ‘mere stones’ referred to in these early documents will have been common features of the landscape and their locations are shown on some early maps. Although they marked important boundaries they could be removed and the Slaithwaite court roll of 1551 records an indictment against Thomas Hoyle for displacing the merestones which marked the boundary with his neighbours. Mere Stones survives as a Wadsworth place-name.