- Enter a word for the dictionary definition.
From The Collaborative International Dictionary of English v.0.48:
Ventilator \Ven"ti*la`tor\, 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]