ventilation

Etymology

Borrowed from Middle French ventilation, from Old French ventilacion, from Late Latin ventilatio, from Latin ventilo. Morphologically ventilate + -ion

noun

1. The replacement of stale or noxious air with fresh.
   So you punched out a window for ventilation. Was that before or after you noticed you were standing in a lake of gasoline? 1991, Robert DeNiro (actor), Backdraft
2. The mechanical system used to circulate and replace air.
3. An exchange of views during a discussion.
4. The public exposure of an issue or topic.
5. The bodily process of breathing; the inhalation of air to provide oxygen, and the exhalation of spent air to remove carbon dioxide.
6. (medicine) The mechanical system used to assist breathing.