storey
level part of a building that could be used by people
semi-basement
floor of a building that is half below ground
mezzanine
architectural element
level
term of mine structure
ground floor
storey of a building at ground level
Mechanical floor
Mechanical rooms-only skyscraper section
penthouse apartment
apartment on the highest floor of an apartment building
thirteenth floor
Superstition workaround
basement
below-ground floor of a building
piano nobile
architectural element
Diplomatic Reception Rooms, U.S. Department of State
Set of rooms in Washington, DC