Sa*pon"i*fy (?), v. t. [imp. & p. p. Saponified (?); p. pr. & vb. n. Saponifying (?).] [L. sapo, -onis, soap + -fy: cf. F. saponifier.]
To convert into soap, as tallow or any fat; hence Chem., to subject to any similar process, as that which ethereal salts undergo in decomposition; as, to saponify ethyl acetate.
© Webster 1913.