ventilation

noun

1. 1

   The replacement of stale or noxious air with fresh.

2. 2

   The mechanical system used to circulate and replace air.

3. 3

   An exchange of views during a discussion.

4. 4

   The public exposure of an issue or topic.

5. 5

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

6. 6

   The mechanical system used to assist breathing.