ven·ti·la·tion | \ˌven-tə-ˈlā-shən \

Definition of ventilation 

1 : the act or process of ventilating

2a : circulation of air a room with good ventilation

b : the circulation and exchange of gases in the lungs or gills that is basic to respiration

3 : a system or means of providing fresh air

Examples of ventilation in a Sentence

Recent Examples on the Web

The safety institute cited uncontrolled ventilation as a contributing factor in the deaths of at least eight firefighters in the last few years. Mike Hendricks, kansascity, "In a tragic loop, firefighters continue to die from preventable mistakes," 13 July 2018 The property features air shafts that provide ventilation to the Red Line tunnel, and the building has huge industrial chillers on the roof that pump in cool air to the Gallery Place, Judiciary Square and Archives-Navy Memorial stations. Martine Powers, Washington Post, "Metro seeks buyer for downtown D.C. headquarters," 12 July 2018 The oily gaseous mixture then deposits on the intake valves via the positive crankcase ventilation, or PCV, system. Bob Weber,, "Drivers can ship your car cross country," 8 July 2018 The oxygen in the cave is depleted because the area where the kids are trapped does not seem to be receiving much ventilation from the surface. Brian Resnick, Vox, "Why the trapped Thai soccer team is in increasing trouble: they’re running out of oxygen," 6 July 2018 These, by contrast, are in their own way as memorable as the buildings around them — conjuring up adventurous small worlds that include such unexpected touches as marble-studded panels that screen a ventilation shaft from the parking garage below. John King,, "Civic Center makeover: Here’s the plan to revamp the heart of SF," 29 June 2018 In a study published in 2016, doctors at the University of Bristol showed that, just by switching the default settings on the machine, patients received safer ventilation. The Economist, "Hospitals are learning from industry how to cut medical errors," 28 June 2018 The rules do mandate ventilation for cells and other habitable spaces. Laura Crimaldi,, "Health inspectors visit prisons after receiving complaints about heat," 13 July 2018 Those upgrades will include improved ventilation through a new HVAC system, new filtration and seating, a top-quality sound system and possibly new lighting. Beth Mlady,, "Berea middle school pool will be renovated instead of building one at future high school," 30 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ventilation.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of ventilation

1519, in the meaning defined at sense 1

History and Etymology for ventilation

borrowed from Latin ventilātiōn-, ventilātiō, from ventilāre "to expose to the air, ventilate" + -tiōn-, -tiō, suffix of action nouns

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Last Updated

23 Sep 2018

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Time Traveler for ventilation

The first known use of ventilation was in 1519

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More Definitions for ventilation


ven·ti·la·tion | \ˌven-tə-ˈlā-shən \

Kids Definition of ventilation

1 : the act or process of ventilating

2 : a system or means of providing fresh air


ven·ti·la·tion | \ˌvent-ᵊl-ˈā-shən \

Medical Definition of ventilation 

1 : the act or process of ventilating

2 : the circulation and exchange of gases in the lungs or gills that is basic to respiration

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