\A`["e]r*i*fi*ca"tion\, n. [Cf. F. a['e]rification. See {A?rify}.] 1. The act of combining air with another substance, or the state of being filled with air. 2. The act of becoming a["e]rified, or of changing from a solid or liquid form into an a["e]riform state; the state of being a["e]riform.