ventilation

noun6

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
2. •
   The bodily process of breathing; the inhalation of air to provide oxygen, and the exhalation of spent air to remove carbon dioxide.

   • This toxin impairs ventilation by causing inflammation in the bronchioles.
3. •
   Ellipsis of mechanical ventilation.

   • It is time to try to wean this patient from ventilation.
4. •
   The mechanical system used to circulate and replace air.
5. •
   An exchange of views during a discussion.
6. •
   The public exposure of an issue or topic.