D defs.my
Entry 5 senses Webster, 1913

Ventilation

/vĕnˌ-təl-āsh'-ən/ · Ven·ti·la·tion · IPA /ˌvɛntɪˈleɪʃ(ə)n/
01 n. 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 p…
  1. 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. 2.
    The act of refrigerating, or cooling; refrigeration; as, ventilation of the blood.[Obs.]
  3. 3.
    The act of fanning, or winnowing, for the purpose of separating chaff and dust from the grain.
  4. 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.” Bp. Hall.
  5. 5.
    The act of giving vent or expression.