1.expose to cool or cold air so as to cool or freshen;
air the old winter clothes
2.expose to the circulation of fresh air so as to retard spoilage;
Wheat should be well ventilated
3.circulate through and freshen;
The gust of air ventilated the room
4.give expression or utterance to;
She vented her anger
5.furnish with an opening to allow air to circulate or gas to escape;
The architect did not thnk about ventilating the storage space