vestibule /vesˈti-būl/

1. An entrance hall
2. A cavity serving as entrance to another, esp that of the inner ear (anatomy)
3. Part of a railway carriage connecting with and giving access to the next (N American)
4. A forecourt (ancient hist)

To provide with a vestibule

vestibˈūlar adjective

• keep one's bed
• keep one's breath to cool one's porridge
• keep one's cards close to one's chest
• keep one's chin up
• keep one's cool
• keep one's countenance
• keep one's distance
• keep one's ear to the ground
• keep oneself to oneself
• keep one's end up
• keep one's eye in
• keep one's eye on
• keep one's eyes peeled
• keep one's eyes skinned
• keep one's finger on the pulse
• keep one's fingers crossed
• keep one's hair on
• keep one's hand in
• keep one's head
• keep one's head above water
• keep one's head down
• keep one's mind on
• keep one's mouth shut
• keep one's nose clean
• keep one's options open