ground floor 
noun British
The floor of a building at ground level: [as modifier]: a ground-floor flat...
- It was a ground-floor flat in one of the redbrick two-storey buildings that made up one side of Ormond Square.
- Opposite this is an anonymous-looking office building with a large ground-floor window.
- He said the attacker left by a taxi, only to return later on foot and smash a ground-floor window to the building.
Phrases
get in on the ground floor
- non-residentiary
- non-residing
- non-resistance
- non-resistant
- non-resisting
- non-response
- non-restraint
- non-restrictive
- non-retaliation
- non-return
- non-returnable
- non-return-to-zero
- nonreward
- nonrewarded
- non-rhotic
- non-riding
- non-rigid
- non-Roman
- non-rotating
- non-ruminant
- non-rural
- non-sane
- non-sanity
- non-saturated
- non-scene