Effective Ef*fect"ive, a. [L. effectivus: cf. F. effectif.] Having the power to produce an effect or effects; producing a decided or decisive effect; efficient; serviceable; operative; as, an effective force, remedy, speech; the effective men in a regiment. [1913 Webster]

They are not effective of anything, nor leave no work behind them. --Bacon. [1913 Webster]

Whosoever is an effective, real cause of doing his heighbor wrong, is criminal. --Jer. Taylor.

Syn: Efficient; forcible; active; powerful; energetic; competent. See {Effectual}. [1913 Webster]

The Collaborative International Dictionary of English. 2000.