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- Dictionaryven·ti·la·tion/ˌven(t)əˈlāSHən/
noun
- 1. the provision of fresh air to a room, building, etc.: "ventilation of the mines had long been mechanized"
- 2. the supply of air to the lungs, especially by means of a machine or device used to support or replace the breathing of a person who is ill, injured, or anesthetized.
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