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