Effective
Pronunciation
Origin
France:effectif (late 14c)< Latin: effectus < efficiŠ("productive, effective")
Full definition of effective
Adjective
effective
- Having the power to produce a required effect or effects.The pill is an effective method of birth control.
- Producing a decided or decisive effect.The president delivered an effective speech!
- Jeremy TaylorWhosoever is an effective, real cause of doing his neighbour wrong, is criminal.
- Efficient, serviceable, or operative, available for useful work.How long does it take to make a bunch of civilians an effective military force?My effective income after taxes and child support is $500 a month.The effective radiated power is determined by multiplying the transmitter power output with the antenna gain.The effective voltage of an alternating current is 0.7 times its peak voltage.
- Actually in effect.The curfew is effective at midnight.
Noun
effective
(plural effectives)- (military) A soldier fit for duty.
- 1876, Dabney Herndon Maury, , Recollections of the Elkhorn Campaign:The Army of the West reached Corinth sometime after the battle of Shiloh. We were 15,000 effectives, and brought Beauregard's effective force up to 45,000 men.----