*ventilation*

n. [ L. ventilatio: cf. F. ventilation. ] 1. The act of ventilating, or the state of being ventilated; the art or process of replacing foul air by that which is pure, in any inclosed place, as a house, a church, a mine, etc.; free exposure to air. [ 1913 Webster ]

Insuring, for the laboring man, better ventilation. F. W. Robertson. [ 1913 Webster ]

2. The act of refrigerating, or cooling; refrigeration; as, ventilation of the blood. [ Obs. ] Harvey. [ 1913 Webster ]

3. The act of fanning, or winnowing, for the purpose of separating chaff and dust from the grain. [ 1913 Webster ]

4. The act of sifting, and bringing out to view or examination; free discussion; public exposure. [ 1913 Webster ]

The ventilation of these points diffused them to the knowledge of the world. Bp. Hall. [ 1913 Webster ]

5. The act of giving vent or expression. “Ventilation of his thoughts.” Sir H. Wotton. [ 1913 Webster ]