perimeter wall
Outer defensive structure
A perimeter wall is a wall enclosing the outer boundary of a property, compound, or fortification.
It marks the edge of controlled space and typically serves security purposes—keeping intruders out or occupants in: The prison's perimeter wall was topped with razor wire.
In architecture and military contexts, perimeter walls define the defensible boundary of a structure or installation.
- boundaryLine marking a limit
- fenceBoundary structure between properties
- security fenceProtective boundary structure
- enclosureConfined, bordered space
- gated communityRestricted-access residential area
fortification · barrier · rampart · security · guard · guard tower · fortress · stone · concrete · razor wire · no man's land · patrol · compound · estate · prison · prison yard · castle · bulwark
- barriersfences, fence, barrier, gates, privacy fence
- fortificationsfort, fortress, fortresses, citadel, citadels
- military base partsmess hall, armory, barracks, watchtower, gates
- wallsdrywall, wallboard, bulkhead, rampart, bastion
- defensive wallsrampart, parapet, battlement, bulwark, bastion
- security barriersbarrier, barricade, border fence, security fence, concrete barrier
perimeter, wall, perimeters, walls, walled, walling, meter, meters, metric