vestibule-n; 2 Senses

Sense Number 1: an enclosed passageway connected to other rooms

Commentary: VESTIBULE[+structure][+architectural][+passageway][+enclosed][+connecting]

They stood in the vestibule of the main lobby, waiting for a cab.
The entrance of the luxury railcar had a private vestibule.
We were led through a vestibule into a narrow hallway to the desk of the hotel clerk.

WordNet 3.0 Sense Numbers: 1

Sense Number 2: an anatomical cavity in the body

Commentary: VESTIBULE[+structure][+anatomical][+cavity][+connecting]

The child had an infection of the vestibule of the inner ear.
The vestibule of the left ventricle of her heart had a malformation.

WordNet 3.0 Sense Numbers: 2