A modern dictionary of Catholic terms, both common and obscure. Find accurate definitions of words and phrases.
In scholastic philosophy and theology, an efficient cause, namely that which by its activity produces existence or change in another. (Etym. Latin agens, doing, active, effecting; also cause, agent; from agere, to do, drive, conduct.)
All items in this dictionary are from Fr. John Hardon's Modern Catholic Dictionary, © Eternal Life. Used with permission.