Ef*fi"cient (?), a. [L. efficiens, -entis, p. pr. of efficere to effect: cf. F. efficient. See Effect, n.]

Causing effects; producing results; that makes the effect to be what it is; actively operative; not inactive, slack, or incapable; characterized by energetic and useful activity; as, an efficient officer, power.

The efficient cause is the working cause. Wilson.

Syn. -- Effective; effectual; competent; able; capable; material; potent.


© Webster 1913.

Ef*fi"cient (?), n.

An efficient cause; a prime mover.

God . . . moveth mere natural agents as an efficient only. Hooker.


© Webster 1913.