ventilatev. t.[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.()2. To provide with a vent, or escape, for air, gas, etc.; as, to ventilate a mold, or a water-wheel bucket.()3. To change or renew, as the air of a room.(Harvey.)4. To winnow; to fan; as, to ventilate wheat.()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.)6. To give vent to; to utter; to make public.()Macaulay took occasion to ventilate one of those startling, but not very profound, paradoxes. (J. C. Shairp.)