1.TBBa spaceinside the front door of a public building 〔公共建筑物前门内的〕门厅,前厅
2.American EnglishAmE the space at each end of a railwaycarriage that connects it with the next carriage 〔连接火车前后车厢的〕通廊,连廊
Examples from the Corpus
vestibule• Just inside the vestibule there was coconut matting, and seeing this Mum looked about then began to wipe her feet.• He forced the couple into the vestibule of a bank in Brunswick Street where he made them take off their clothing.• You enter through a tinyvestibule over which presides a man in uniform.