the world > physical sensation > cleanness and dirtiness > freedom from impurities > removal of impurities > ventilation and air-conditioning > condition air [verb (transitive)] > ventilate (3)
air1530
transitive. To expose to the open air, to ventilate; occasionally with out. Also intransitive: to be exposed to the open air, to be ventilated.
serene1753
To expose to the air (articles suspected of infection). Obsolete.