тамбур(1) an antechamber, hall, or lobby next to the outer door of a building * an enclosed entrance compartment in a railway carriage 2) Anatomy a chamber or channel opening into another, in particular: * the central cavity of the labyrinth of the inner ear * the part of the mouth outside the teeth * the space in the vulva into which both the urethra and vagina open. NODE. It occurs to me that maybe y'all don't know what the vestibule looks like. It's a small open space between train cars, where you can stand to smoke, socialize, or watch the scenery go by. Alexander Demidov)
