Demarcate (verb)

To mark or define the boundaries or limits of something; to distinguish or separate something from others.

Origin:

From the latin word "demarcatus" meaning "marked off".

Examples:

1. The border was demarcated by a fence.
2. The territory was demarcated by a river.
3. The area was demarcated by a line.
4. The property was demarcated by a wall.
5. The boundaries of the park were demarcated by signs.