vestibule
nounUK /ˈvestɪbjuːl/
US /ˈvestɪbjuːl/
A small room you walk through to get into a bigger room.
She left her wet boots in the vestibule before entering the house.
OTHER MEANINGS
2. A small enclosed space at the front of a train car that connects to the next car.
The conductor stood in the vestibule between the two carriages.
3. A small cavity or channel leading into a larger body part, such as the inner ear.
The vestibule of the ear helps with balance.
4. A covered passage or area in front of a building's main door.
They waited in the vestibule until the rain stopped.