ventilation

noun

ven·​ti·​la·​tion ˌven-tə-ˈlā-shən 

1

: the act or process of ventilating

2

a

: circulation of air

a room with good ventilation

b(1)

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

(2)

: artificial respiration of the lungs

specifically : mechanical ventilation

ventilation to supply oxygen to the patient's lungs

3

: a system or means of providing fresh air

Examples of ventilation in a Sentence

Recent Examples on the Web

But, sadly, because bathrooms are such high-moisture rooms with a lack of ventilation, mold is easy to grow. —Ashlyn Needham, Southern Living, 12 Sep. 2025

Thousands of Toyota, Lexus and Subaru vehicles have been recalled because of issues with their heating, ventilation and air conditioning systems. —Melina Khan, USA Today, 11 Sep. 2025

Then, at the end of the episode, Slightly pulls Arthur’s body into a ventilation shaft, in what could be a belated act of regret or an attempt to preserve a Xenomorph host body before any other aliens can eat it. —Noel Murray, Vulture, 10 Sep. 2025

For instance, the state could offer funding or other incentives for schools to upgrade their ventilation systems or otherwise address poor indoor air quality. —Ana Santos Rutschman, The Conversation, 9 Sep. 2025

Word History

Etymology

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

First Known Use

1664, in the meaning defined at sense 1

Phrases Containing ventilation

• artificial ventilation
• mechanical ventilation

Rhymes for ventilation

• abdication
• aberration
• abjuration
• abnegation
• abrogation
• acceptation
• acclamation
• acclimation
• accusation
• activation
• actuation
• acylation

Kids Definition

ventilation

noun

ven·​ti·​la·​tion ˌvent-ᵊl-ˈā-shən 

1

: the act or process of ventilating

2

: circulation of air

a room with good ventilation

3

: a system or means of providing fresh air

Medical Definition

ventilation

noun

ven·​ti·​la·​tion ˌvent-ᵊl-ˈā-shən 

1

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

2

: artificial respiration of the lungs

specifically : mechanical ventilation

began ventilation to supply oxygen to the patient's lungs

3

: the circulation of air through a space and especially an enclosed space