Vent

A vent can refer to:

A volcano. (also commonly a term for a deep sea vent)
An outlet of a biological ventilation system that allows the exchange of air; see gas exchange
An external opening of a urinary or genital system in lower vertebrates (eg - salamanders)
The discharge from a combustion chamber; see chimney
A small village in the Ötztal Alps, Austria
Ventrilo—an internet VoIP chat system service.