ground floor
US /ˈɡraʊnd flɔːr/
UK /ˈɡraʊnd flɔːr/

1.
planta baja
the floor of a building that is at the same level as the ground outside
:
•
The reception area is on the ground floor.
La zona de recepción está en la planta baja.
•
Our apartment is on the ground floor, so it's easy to access.
Nuestro apartamento está en la planta baja, por lo que es de fácil acceso.