By extension, a process in which other gases (such as carbon dioxide or nitrogen or argon) are circulated through or mixed with a substance (usually liquid), sometimes with the consequence of increasing the transfer of air into the same liquid at the surface due to the induced circulation.
The process by which air is circulated through or mixed with a substance such as soil or a liquid.
The act of respiration; a single instance of this.
Aspiration; secret prayer.
Any gentle influence or operation; inspiration.
A diacritical mark indicating aspiration or lack thereof.