? a frontier region.

gen. A boundary or frontier of a country, district, or region. Also: a tract of land on or constituting a border, or a disputed tract of land…

plural. The territory situated on or near a boundary; a borderland; also land within certain limits, a district, neighbourhood, tract.

The border, bound, or limit, of a country; territory on or near a boundary or frontier, borderland. (Chiefly plural.) Obsolete.

A border territory or march. Now only in attributive use.

The district lying along the edge of a country or territory, a frontier; plural the marches, the border districts.

Land comprising the marches of a country; a border territory or district.

plural. Boundaries, bounds, frontiers, borders; the bordering or bounding regions, borderlands.

= frontier, n. 4. Obsolete.

A borderland; an immediately neighbouring country.

Border-country, territory, district.

territory bordering on another country.

U.S. ‘That part of a country which forms the border of its settled or inhabited regions: as (before the settlement of the Pacific coast), the…

the district about the Border (cf. countryside, n. 1a).

A land or district on or near the border between two countries or districts; particularly the border district between England and Scotland.

Land situated at the rim or edge of something, esp. when considered as having political or strategic significance; an area of such land (chiefly in p…