Vestibule n. : The porch or entrance into a house; a hall or antechamber next the entrance; a lobby; a porch; a hall.

Example:
what wall colour should I choose for my Vestibule??

Taxonomy
Vestibule, free encyclopedia, Vestibulum, anatomical name, entrance, entrance court, external genitalia, aortic vestibule, Radio Free Vestibule, search, free dictionary, meanings, origin, 17th century, Latin, Anatomy, canal, boundary.

Defination from the web:
vestibule is the anatomical name for the entrance to the vagina (it is the boundary between the external genitalia (vulva) and ... The vestibule of the ear refers to the central part of the labyrinth, as used in the vestibular system. ...