boundarystone

noun
UK /ˈbaʊndəri stəʊn/
US /ˈbaʊndəri stoʊn/

A boundarystone is a big rock that shows where one piece of land ends and another begins.

The farmer placed a boundarystone at the corner of his field so everyone would know where his land stopped.


OTHER MEANINGS

2. A stone set in the ground to mark an official border between towns or countries.

The old boundarystone still stands between the two villages.

3. A symbolic stone that represents an important limit or dividing point.

The treaty was a boundarystone between war and peace.

4. A stone used in surveying to fix the exact position of a property corner.

The surveyor checked the boundarystone to confirm the lot size.