ventilator

noun

ven·​ti·​la·​tor ˈven-tə-ˌlā-tər How to pronounce ventilator (audio)
plural ventilators
: something or someone that ventilates: such as
a
: a device for introducing fresh air or expelling foul or stagnant air
b
: a device for maintaining artificial respiration
especially : a mechanized device that enables the delivery or movement of air and oxygen into the lungs of a patient whose breathing has ceased, is failing, or is inadequate : mechanical ventilator

Note: Modern, computerized mechanical ventilators typically monitor and customize gas delivery, maintain a constant pressure in the lungs to prevent the alveoli from collapsing, and deliver air and oxygen to the lungs by way of an endotracheal tube.

Examples of ventilator in a Sentence

The patient was put on a ventilator.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Data have shown that COVID may cause various complications during pregnancy—increasing the risk that the pregnant person may require emergency care, be put on a ventilator or die. Lauren J. Young, Scientific American, 10 June 2025 As of Tuesday, Skylar remains in critical condition and is on a ventilator, according to Chambers. Megan Forrester, ABC News, 3 June 2025 In medical care, withdrawing supportive measures such as a ventilator is not the same as intentionally causing a death. Katherine Drabiak, The Orlando Sentinel, 1 June 2025 Patients who weren’t wearing a helmet required longer ICU stays and more ventilator support. Tanya Mohn, Forbes.com, 29 May 2025 See All Example Sentences for ventilator

Word History

Etymology

ventilate + -or entry 1 (perhaps after Latin ventilātor "winnower")

First Known Use

1743, in the meaning defined above

Time Traveler
The first known use of ventilator was in 1743

Browse Nearby Words

Cite this Entry

“Ventilator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ventilator. Accessed 18 Jun. 2025.

Kids Definition

ventilator

noun
ven·​ti·​la·​tor ˈvent-ᵊl-ˌāt-ər How to pronounce ventilator (audio)
1
: a device for letting in fresh air or driving out bad or stale air
2

Medical Definition

ventilator

noun
ven·​ti·​la·​tor ˈvent-ᵊl-ˌāt-ər How to pronounce ventilator (audio)
: a device for maintaining artificial respiration
especially : a mechanized device that enables the delivery or movement of air and oxygen into the lungs of a patient whose breathing has ceased, is failing, or is inadequate : mechanical ventilator

Note: Modern, computerized mechanical ventilators typically monitor and customize gas delivery, maintain a constant pressure in the lungs to prevent the alveoli from collapsing, and deliver air and oxygen to the lungs by way of an endotracheal tube.

More from Merriam-Webster on ventilator

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!