1 Lobby or entrance-hall of a theatre or other public building.
2 Area outside the auditorium for the audience to meet, promenade, mingle, talk, etc. It acts as a sound-barrier between the exterior and the auditorium.
3 Any public area in a large public or civic building between the exterior and the main parts of the building, i.e. an extended entrance-hall.
4 Room for gatherings or meetings.
5 Room for meetings, especially of actors and performers, in a theatre.