A fairly narrow line or space forming a boundary
The line or area separating geopolitical units
To put or form a border on
To be contiguous or next to
To come near, as in quality or amount
Brockville is just over the border from Maryland and Washington.
You're at the border of a restricted area, by the way.
After adding a bottom border, she changed to the red icing.
The helo flew west, towards the border with Idaho.
When she reached the border of their kingdoms, she broke east on a dirt road.