The act of combining air with another substance, or the state of being filled with air.

The act of becoming aërified, or of changing from a solid or liquid form into an aëriform state; the state of being aëriform.

In turfgrass, a method of cultivation where hollow or solid tines are inserted into and removed from the turfgrass and soil to control soil compaction and increase water and air penetration. Hollow tine aerificaiton involves using hollow tines that remove soil cores or plugs while solid tine aerification using solid tines and does not remove any soil.

or aerifying The process of punching holes in the ground to allow oxygen to the roots of the grass to promote growth. Sometimes the grass plugs are pulled out and other times they are not.