noun the act of giving vent or expression.
2. ventilation ·noun the act of refrigerating, or cooling; refrigeration; as, ventilation of the blood.
3. ventilation ·noun the act of sifting, and bringing out to view or examination; free discussion; public exposure.
4. ventilation ·noun the act of fanning, or winnowing, for the purpose of separating chaff and dust from the grain.
5. ventilation ·noun 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.