a. - 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.
n. - That which produces a given effect; a cause.
n. - One who is capable of active service.
n. - Specie or coin, as distinguished from paper currency; -- a term used in many parts of Europe.
n. - The serviceable soldiers in a country; an army or any military body, collectively; as, France's effective.