Military. A fortification which covers or protects the end of a bridge, esp. one facing an enemy.

A point of support, a fulcrum; (spec. Military) a point of strategic importance; frequently figurative.

Military. Now usually strongpoint. A specially fortified defensive position, especially one within a larger defence system. Also figurative and in…

Ground which is naturally elevated in relation to the surrounding area. Cf. highland, n. 1a.

a fortified position of troops landed on a beach; also transferred and figurative.

Military. An enclosed area of territory which is heavily defended in all directions.

Military. An airbase close to an area of active operations where supplies and troops can be received and evacuated by air. Cf. beachhead n. at beach…