1) Like some entrances 2) Proprioception 
The Vestibular (from vestíbulo, `entrance hall`) is a competitive examination and is the primary and widespread entrance system used by Brazilian universities to select their students. The Vestibular usually takes place from November to January, right before the start of school year in February or March, although certain universities hold it ev.....
• (a.) Of or pertaining to a vestibule; like a vestibule.
(L. vestibularis) pertaining to or toward a vestibule. In dental anatomy, used to refer to the tooth surface directed toward the vestibule of the mouth.
<anatomy> Pertaining to or toward a vestibule. In dental anatomy, used to refer to the tooth surface directed toward the vestibule of the mouth. ... Origin: L. Vestibularis ... (18 Nov 1997) ... 
Ves·tib'u·lar adjective Of or pertaining to a vestibule; like a vestibule. 
Type: Term Pronunciation: ves-tib′yū-lăr Definitions: 1. Relating to a vestibule, especially the vestibule of the ear. Synonyms: vestibularis
Vestibular: 1) Having to do with a structure that is a vestibule (entrance), such as the vestibule of the ear.
Pertaining to the balance mechanism in the inner ear and brain.
[adj] - relating to the sense of equilibrium
adjective relating to the sense of equilibrium
Pertaining to balance. The inner ear and the cerebellum of the brain are responsible for maintaining balance.
relating to the sense of equilibrium