Ventilation /(?)/

Ven·ti·la·tion

Ventilation

n.
  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.
    Insuring, for the laboring man, better ventilation.
    — F. W. Robertson.
  2. The act of refrigerating, or cooling; refrigeration; as, ventilation of the blood. [Obs.]
  3. The act of fanning, or winnowing, for the purpose of separating chaff and dust from the grain.
  4. 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.
  5. The act of giving vent or expression.