1. (

• ventilation ,
• airing

) the act of supplying fresh air and getting rid of foul air ;

2. (

• ventilation ,
• ventilation_system ,
• ventilating_system

) a mechanical system in a building that provides fresh air; "she was continually adjusting the ventilation" ;

3. (

• public_discussion ,
• ventilation

) free and open discussion of (or debate on) some question of public interest; "such a proposal deserves thorough public discussion" ;

4. (

• breathing ,
• external_respiration ,
• respiration ,
• ventilation ,

) the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation ;