vestibule
noun
[ ˈvɛstɪbjuːl ]
• an antechamber, hall, or lobby next to the outer door of a building.
Similar:
entrance hall,
hall,
hallway,
entrance,
porch,
portico,
foyer,
reception area,
lobby,
anteroom,
antechamber,
outer room,
waiting room,
• a chamber or channel opening into another.
Origin:
early 17th century (denoting the space in front of the main entrance of a classical Roman or Greek building): from French, or from Latin vestibulum ‘entrance court’.