Origin: Latin suffix -tion
Ventilation has 5 different meanings across 1 category:
the act of supplying fresh air and getting rid of foul air
"The engineer installed large fans to ensure proper ventilation by constantly supplying fresh air and removing stale fumes from the basement."
a mechanical system in a building that provides fresh air
"she was continually adjusting the ventilation"
free and open discussion of (or debate on) some question of public interest
"such a proposal deserves thorough public discussion"
the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation
"During his intense run, he relied on rapid ventilation to expel the excess carbon dioxide building up in his bloodstream."
The replacement of stale or noxious air with fresh.
"Opening the window provided essential ventilation by replacing the stale, stuffy air inside the room with fresh breezes from outside."
In plain English: Ventilation is how fresh air moves into and out of an enclosed space to keep it breathable.
"The open windows provided fresh ventilation to the stuffy room."
Usage: Ventilation refers specifically to the process of exchanging indoor air, not just opening windows slightly. Use it when discussing systems designed to remove pollutants and supply oxygen rather than casual airflow.
The word entered English via the path of Middle and Old French before arriving from its Latin root ventilo, which means "to fan." Originally describing the act of moving air with a fan or breeze, it has retained this core meaning in modern usage.