v. t. [ imp. & p. p. Ventilated p. pr. & vb. n. Ventilating. ] [ L. ventilatus, p. p. of ventilare to toss, brandish in the air, to fan, to winnow, from ventus wind; akin to E. wind. See Wind rushing air. ] 1. To open and expose to the free passage of air; to supply with fresh air, and remove impure air from; to air; as, to ventilate a room; to ventilate a cellar; to ventilate a mine. [ 1913 Webster ]

2. To provide with a vent, or escape, for air, gas, etc.; as, to ventilate a mold, or a water-wheel bucket. [ 1913 Webster ]

3. To change or renew, as the air of a room. Harvey. [ 1913 Webster ]

4. To winnow; to fan; as, to ventilate wheat. [ 1913 Webster ]

5. To sift and examine; to bring out, and subject to penetrating scrutiny; to expose to examination and discussion; as, to ventilate questions of policy. Ayliffe. [ 1913 Webster ]

6. To give vent to; to utter; to make public. [ 1913 Webster ]

Macaulay took occasion to ventilate one of those startling, but not very profound, paradoxes. J. C. Shairp. [ 1913 Webster ]

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 ]

a. Of or pertaining to ventilation; adapted to secure ventilation; ventilating; as, ventilative apparatus. [ 1913 Webster ]

n. [ Cf. F. ventilateur, L. ventilator a winnower. ] A contrivance for effecting ventilation; especially, a contrivance or machine for drawing off or expelling foul or stagnant air from any place or apartment, or for introducing that which is fresh and pure. [ 1913 Webster ]