1.Definition: a mechanical system in a building that provides fresh air

"She was continually adjusting the ventilation"

Category: Objects

2.Definition: free and open discussion of (or debate on) some question of public interest

Category: General

3.Definition: the act of supplying fresh air and getting rid of foul air

Category: General

4.Definition: the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation

Related Noun(s):respiration

Category: General