aeration aer·a·tion (âr'ā'shən)n.
Exposure to air.
Saturation of a fluid with air or a gas.
The exchange of carbon dioxide and oxygen in the lungs.
To add a gas, such as carbon dioxide, to a liquid.
To supply with oxygen. Blood is aerated in the alveoli of the lungs.
To supply with air or expose to the circulation of air.