aeration aeration /ˌɛəˈreɪʃən/

noun

1. () The process of exposing to air (so as to purify)  ( aeration )
   the process of exposing to air (so as to purify)
    The aeration of the soil
   the aeration of the soil
   
2. The act of charging a liquid with a gas making it effervescent  ( aeration )
   the act of charging a liquid with a gas making it effervescent