mezzanine

US /ˈmet.sə.niːn/
UK /ˈmet.sə.niːn/
"mezzanine" picture
1.

mezzanine, entresol

a low story between two main stories of a building, typically an intermediate floor between the ground floor and the first floor.

:
The library has a beautiful mezzanine level with extra seating.
La bibliothèque dispose d'une belle mezzanine avec des sièges supplémentaires.
We watched the concert from the mezzanine seats.
Nous avons regardé le concert depuis les sièges de la mezzanine.