English Dictionary

effective

/ɪˈfɛktɪv/

adj

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.

The new marketing strategy proved to be highly effective in increasing sales.

意味（1）

Having the power to produce a required effect or effects.

The pill is an effective method of birth control.

意味（2）

Producing a decided or decisive effect.

The president delivered an effective speech!

意味（3）

Efficient, serviceable, or operative, available for useful work.

How long does it take to make a bunch of civilians an effective military force?

意味（4）

Actually in effect.

The curfew is effective at midnight.

意味（5）

(geometry, of a cycle or divisor) Having no negative coefficients.

意味（6）

(physics, for any effective theory) approximate; Not describing the fundamental dynamic changes in some system as they happen.