plural of effective

Having the power to produce a required effect or effects. / Producing a decided or decisive effect. / Efficient, serviceable, or operative, available for useful work. / Actually in effect.

(military) a soldier fit for duty

In an efficient or effective manner; with powerful effect. / Essentially, in effect, for all practical purposes.

The property of being effective, of achieving results. / The capacity or potential for achieving results. / The degree to which something achieves results.

plural of effectiveness

(dated, 1600s) Capable of being done or achieved.

(dated, 1600s) Capability of being done or achieved.

Alternative form of effector

plural of effectivity