Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. built work divisions
7. rooms and spaces
8. [rooms and spaces by function]
9. protective spaces

Narrower term/s

• air raid shelters
• nuclear bomb shelters

Anotations

Scope note:

Structures or chambers, often underground, that are reinforced against bombing and typically stocked with food and living essentials, intended to be used by civilians or military personnel in case of enemy bomb attack.