What does ventilator mean?
A ventilator is most commonly a medical device that supports breathing by delivering pressurized air or oxygen to a patient’s lungs and, depending on the design, assisting with exhalation. The word can also denote a mechanical system that circulates fresh air through a building, vehicle, mine, or other enclosed space. In current everyday use, “ventilator” usually suggests intensive-care technology and evokes artificial breathing; during the COVID-19 pandemic, it also became closely associated with hospital capacity and shortages of critical-care equipment. The sense for a building or ventilation system is older and less frequent, while the verb “to ventilator” is archaic. In ordinary discussion, the word is serious and technical rather than emotionally neutral: it commonly refers to life-sustaining machinery, although the broader engineering sense simply describes the movement or renewal of air.
A device that supports or controls breathing by delivering air or oxygen to the lungs, or a mechanical system that introduces and circulates air in an enclosed space.
"Doctors placed the severely ill patient on a ventilator in the intensive-care unit."
The medical meaning is now the dominant one; the general engineering meaning remains common in technical contexts.
To ventilate or provide with fresh air.
"The chamber was ventilatored through an overhead duct."
Rare and archaic; “ventilate” is the standard modern verb.
The standard plural in both British and American English.
"The hospital ordered additional ventilators before the surge in patients."
During the COVID-19 pandemic, “ventilator” became shorthand for the intensive-care capacity and equipment at the heart of the global health crisis.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does ventilator come from?
English ventilator was formed from ventilate plus the suffix -or, identifying something that performs the action of ventilating. Its deeper source is Latin ventilare, “to fan, blow, or ventilate,” which was derived from ventus, “wind.” The same Latin foundation underlies ventilation and ventilate, while vent is also related through the Latin word for wind.
Related word forms
How ventilator is actually used
The medical sense is dominant in contemporary English and often carries associations with intensive care and life-sustaining treatment. The broader engineering sense is established but less frequent in everyday use. The verb is archaic and formal; modern speakers normally use “ventilate” instead.
Easily confused with ventilator
A ventilator moves air into and out of the lungs, whereas a respirator typically filters the air a person breathes, although historical usage sometimes applied “respirator” to a breathing machine.