From The Collaborative International Dictionary of English v.0.48:

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