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