n. [ L. arefacere to dry. ] The act of drying, or the state of growing dry. [ 1913 Webster ]
The arefaction of the earth. Sir M. Hale. [ 1913 Webster ]
n. [ Cf. F. raréfaction. See Rarefy. ] The act or process of rarefying; the state of being rarefied; -- opposed to condensation;