The boundaries of that country were changed by a treaty.
Is there anything that is beyond the boundary of human knowledge?
1. Just before the town boundary fork left onto a minor road.
2. The ball was caught by a fielder standing just inside the boundary.
3. A river forms the boundary between the two countries.
4. The boundary between Shanxi and Shaanxi is the Huanghe River.
5. The river is the boundary between the two countries.
6. The boundary questions still remain unsettled.