- ventilator - a device (such as a fan) that introduces fresh air or expels foul air
--1 is a kind of device
--1 is a part of ventilation, ventilation system, ventilating system
--1 has parts: air filter, air cleanerDerived forms: verb ventilate2, verb ventilate5, verb ventilate1 - breathing device, breathing apparatus, breathing machine, ventilator - a device that facilitates breathing in cases of respiratory failure
--2 is a kind of device
--2 has particulars:aqualung, Aqua-Lung, scuba; oxygen mask; respirator, inhalator; resuscitator; snorkel