effective (adj.)

late 14c., "serving to effect the intended purpose," from Old French effectif, from Latin effectivus "productive, effective," from effect-, stem of efficere "work out, accomplish" (see effect (n.)). Of military forces, "fit for action or duty," from 1680s.

updated on December 21, 2016

Definitions of effective from WordNet

effective (adj.)
exerting force or influence;
the law is effective immediately
Synonyms: good / in effect / in force
effective (adj.)
producing or capable of producing an intended result or having a striking effect; "an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation"-LewisMumford;
made an effective entrance
effective steps toward peace
effective teaching methods
Synonyms: effectual / efficacious
effective (adj.)
able to accomplish a purpose; functioning effectively; "people who will do nothing unless they get something out of it for themselves are often highly effective persons..."-G.B.Shaw;
effective personnel
Synonyms: efficient
effective (adj.)
works well as a means or remedy;
an effective reprimand
a lotion that is effective in cases of prickly heat
effective (adj.)
existing in fact; not theoretical; real;
confused increased equipment and expenditure with the quantity of effective work done
a decline in the effective demand
effective (adj.)
ready for service;
the fort was held by about 100 effective soldiers
Etymologies are not definitions. From, not affiliated with etymonline.