vestibule

noun

1. architectureA small entrance hall, antechamber, passage, or room between the outer door and the main hall, lobby, or interior of a building.

2. architectureA large entrance hall in a temple or palace.

3. rail transportAn enclosed entrance at the end of a railway passenger car.

4. anatomyAny of a number of body cavities or channels, serving as or resembling an entrance to another bodily space.

5. The central cavity of the bony labyrinth of the inner ear or the parts (such as the saccule and utricle) of the membranous labyrinth that it contains.

6. The part of the left ventricle below the aortic orifice.

7. The part of the mouth outside the teeth and gums.

8. A large entrance or reception room or area

   Similar: anteroom, antechamber, entrance hall, hall, foyer, lobby

9. Any of various bodily cavities leading to another cavity (as of the ear or vagina)body

Clipping of vulval vestibule: the space in the vulva between the labia minora and into which both the urethra and vagina open.

verb

1. To furnish with a vestibule or vestibules.