It's a small walk-through area just inside the main front door of a house - separated from the rest of the house by another door.
The word "vestibule" is a noun.
Three
A large vestibule in the house led from the kitchen to the garden. The priest was concerned about damaged windows in the vestibule of the church.
3
Yes the word vestibule is a noun. It is a common noun.
When I entered their home, I walked through the vestibule and proceeded upstairs.
The church vestibule is still being used on Saturday mornings for the sale of books.
sacristy
vestibule have 2 meaning also it is nounone thing is (formal)an entrance hall of a large building, for example where hats and coats can be leftsecond thing is (technical) a space at the end of coach/ car on a train that connects it with the next coach/car
In modern architecture a vestibule refers to a small room near the entrance of a building or home. In ancient times, a vestibule referred to a small enclosed area that separated the entrance of a home from the street.
In anatomy, the vestibule is a structure in the inner ear that serves as a passage leading to the cochlea, which is responsible for hearing. It helps in maintaining balance and spatial orientation by detecting movements of the head.
The vestibule is the outer area or hall near the entrance, which may have specific uses or dedications. A specific vestibule leading into the church nave is called the narthex.