Relational Of or pertaining to a vestibule in a building (or railway coach).
[…]while the outer world was fenced off by the interposed atrium or vestibular cloister,[…].1861, Alexander James Beresford Beresford Hope, The English Cathedral of the Nineteenth Century, page 158:
Originally, it was intended that the stock should be vestibular throughout, but when the drawings were submitted to the Prince of Wales, he cut out this feature, saying that a railway journey afforded one of the very few occasions when he was able to enjoy absolute privacy—a feature which the vestibule would tend to abolish.1950 August, “Notes and News: Royal Train at Croydon”, in Railway Magazine, pages 569-570:
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Anatomy, Medicine, SciencesRelational Of, pertaining to, or functioning as a vestibule (body cavity).
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Anatomy, Medicine, SciencesRelational Of or pertaining to the vestibule of the inner ear and the perception of body position, balance and movement.
vestibular impulse
Ampulla of the perpendicular semicircular canal, receiving a fasciculus from the superior branch of the vestibular nerve[…].1859, William James Erasmus Wilson, William H. Gobrecht, A System of Human Anatomy, General and Special:
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Dentistry, Medicine, SciencesRelational Of or pertaining to the surface of a tooth that is directed outward toward the vestibule of the mouth, including the buccal and labial surfaces, and opposite the lingual (or oral) surface.
EducationRelational A competitive examination used by Brazilian universities to select students.
Students usually complete high school when they are seventeen years old. If they want to go to college or university, they must pass a difficult test called the vestibular, which takes two or three days to write.2002, Malika Hollander, Brazil: The People, page 23: