noun which may take the genitive case particle 'no'
outside a wall; beyond a wall; extramural
Used to describe something located or happening outside a physical or metaphorical wall. Often appears in formal or technical contexts, such as architecture, urban planning, or fantasy settings.
壁外調査は危険を伴う。
Investigations outside the wall are dangerous.
壁外の世界は未知の領域だ。
The world beyond the wall is an unknown territory.