ventilation

Noun
  1. The act of supplying fresh air and getting rid of foul air (synset 100267489)
  2. A mechanical system in a building that provides fresh air (synset 104533815)
    "she was continually adjusting the ventilation"
  3. Free and open discussion of (or debate on) some question of public interest (synset 107158898)
    "such a proposal deserves thorough public discussion"
  4. The bodily process of inhalation and exhalation;
    The process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation (synset 100832852)

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