| n. | 1. | Exposure to the free action of the air; airing; |
| 2. | (Physiol.) A change produced in the blood by exposure to the air in respiration; oxygenation of the blood in respiration; arterialization. | |
| 3. | The act or preparation of charging a liquid with carbon dioxide gas to make it effervescent. | |
| 4. | the act of charging a liquid with air or oxygen for the purpose of purification. |
| Noun | 1. | aeration - the process of exposing to air (so as to purify) |
| 2. | aeration - the act of charging a liquid with a gas making it effervescent |