ves ‧ ti ‧ bule /ˈvestəbjuːl, ˈvestɪbjuːl/ BrE AmE noun [countable] formal
[ Date: 1600-1700 ; Language: Latin ; Origin: vestibulum ]
1 . a space inside the front door of a public building
2 . American English the space at each end of a railway carriage that connects it with the next carriage