effective

About 91.26 uses per million words.

Meaning

1. adjective Having the power to produce a required effect or effects.

   The pill is an effective method of birth control.

2. adjective Producing a decided or decisive effect.

   The president delivered an effective speech!

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

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

4. adjective Actually in effect.

   effective immediately

5. adjective Having no negative coefficients.
6. adjective Such that no group element acts trivially.
7. adjective approximate; Not describing the fundamental dynamic changes in some system as they happen.
8. noun a soldier fit for duty

Similar words

efficacious effectual operative in effect competent operational efficient actual impressive good

Often followed by

in and than for as way use means date

Word family

effectiveness effectivenesses effectives effectivities effectivity