† castifiˈcationObs.rare—1. [as if ad. L. *castificātiōn-em, f. L. castificāre to purify, f.castus chaste.] A making chaste, purification; chastity. 1653Jer. Taylor Serm. at Gold. Grove (1678) 226 Let no impure spirit defile the virgin purities and castifictions of the soul.