DictionaryborderTerritorial boundary
noun / verb

border

BOR-der/ˈbɔːrdər/

The boundary at the edge of something.

A dark line marks the border between the two regions.

A close overhead view of a simple physical map: two adjoining regions in muted green and ochre share one crisp, dark boundary line.
Etymology

Old French bordeure named a seam or edge, including the edge of a shield. That concrete outer margin became a geographical boundary: the edge of a city’s or country’s territory.

In context

United States Institute of Peace24:42
it is extremely important that we have a managed border uh between the two countries
Can a New U.S.-Pakistani Diplomacy Help in Afghanistan?

More examples

  • A floral border runs around the scarf.
  • Mexico borders the United States.
  • His confidence borders on arrogance.

Forms

border · borders · bordered · bordering

borderland noun — An area near a territorial border.

Similar words

boundary
Boundary applies to any limit, including property and administrative divisions.
frontier
Frontier can mean the region along a border, not just its line.