Definition of aeration noun from the Oxford Advanced Learner's Dictionary

 

aeration

 noun
noun
BrE BrE//eəˈreɪʃn//
 
; NAmE NAmE//eˈreɪʃn//
 
 
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[uncountable] the process of making it possible for air to become mixed with soil, water, etc. The primary effect of soil flooding is to reduce aeration of the soil.