ventilator Meaning, Definition & Usage

  1. noun a device (such as a fan) that introduces fresh air or expels foul air
  2. noun a device that facilitates breathing in cases of respiratory failure
    breathing machine; breathing device; breathing apparatus.

WordNet

Ven"ti*la`tor noun
Etymology
Cf. F. ventilateur, L. ventilator a winnower.
Definitions
  1. 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.

Webster 1913