What is the meaning of ventilate?

verb

• Expose to cool or cold air so as to cool or freshen.
  • usage: "air the old winter clothes"; "air out the smoke-filled rooms"
  • synonyms: vent, air out, air
• Expose to the circulation of fresh air so as to retard spoilage.
  • usage: "Wheat should be well ventilated"
• Circulate through and freshen.
  • usage: "The gust of air ventilated the room"
• Give expression or utterance to.
  • usage: "She vented her anger"; "The graduates gave vent to cheers"
  • synonyms: vent, give vent
• Furnish with an opening to allow air to circulate or gas to escape.
  • usage: "The architect did not think about ventilating the storage space"