definition of
ventilation

[1] #1 ventilation n. [airing] the act of supplying fresh air and getting rid of foul air. wn

[2] #2 ventilation n. [ventilation system, ventilating system] a mechanical system in a building that provides fresh air; "she was continually adjusting the ventilation". wn

[3] #3 ventilation n. [public discussion] free and open discussion of (or debate on) some question of public interest; "such a proposal deserves thorough public discussion". wn

[4] #4 ventilation n. [breathing, external respiration, respiration] the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation. wn