expiating definition
verb (used with object), expiated, expiating. 1. to atone for; make amends or reparation for: to expiate one's crimes. Origin of expiate. Latin. 1585-1595. 1585-95; < Latin expiÄtus (past participle of expiÄre to atone for, make good), equivalent to ex- ex-1 + piÄ(re) to propitiate (see pious) + -tus past participle suffix.