ventilation

(n) the act of supplying fresh air and getting rid of foul air airing,
(n) a mechanical system in a building that provides fresh air
- she was continually adjusting the ventilation
ventilating system, ventilation system,
(n) free and open discussion of (or debate on) some question of public interest
- such a proposal deserves thorough public discussion
public discussion,
(n) the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation breathing, external respiration, respiration,

airing ventilating system ventilation system public discussion breathing external respiration respiration

ventilation shaft ventilation system