ventilation

/V EH0 N T AH0 L EY1 SH AH0 N/
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.

Source: https://en.wiktionary.org/wiki/ventilation