What does "ventilation" mean?

Ventilation: The act of refrigerating, or cooling; refrigeration; as, ventilation of the blood. [Obs.] Harvey.

Additional senses

  1. 2.The act of fanning, or winnowing, for the purpose of separating chaff and dust from the grain.
  2. 3.The act of sifting, and bringing out to view or examination; free discussion; public exposure. The ventilation of these points diffused them to the knowledge of the world. Bp. Hall.
  3. 4.The act of giving vent or expression. "Ventilation of his thoughts." Sir H. Wotton.

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