effective

[ ih-fek-tiv ]
/ ɪˈfɛk tɪv /

adjective

adequate to accomplish a purpose; producing the intended or expected result: effective teaching methods; effective steps toward peace.
actually in operation or in force; functioning: The law becomes effective at midnight.
producing a deep or vivid impression; striking: an effective photograph.
prepared and available for service, especially military service.

noun

a member of the armed forces fit for duty or active service.
the effective total of a military force.

Origin of effective

1350–1400; Middle English < Latin effectīvus practical, equivalent to effect(us), past participle of efficere (see effect) + -īvus -ive
SYNONYMS FOR effective
1 capable, competent. Effective, effectual, efficacious, efficient refer to that which is able to produce a (desired) effect. Effective is applied to that which has the power to, or which actually does, produce an effect: an effective action, remedy, speech. Effectual is used especially of that which produces the effect desired or intended, or a decisive result: An effectual bombardment silenced the enemy. Efficacious suggests the capability of achieving a certain end: an efficacious plan, medicine. Efficient (applied also to persons) implies the skillful use of energy or industry to accomplish desired results with little waste of effort: efficient methods; an efficient manager.
2 operative.
3 telling.
Related forms
Can be confusedaffective effective (see synonym study at the current entry)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for effective

British Dictionary definitions for effective

effective

/ (ɪˈfɛktɪv) /

adjective

noun

a serviceman who is equipped and prepared for action
Derived Formseffectively, adverbeffectiveness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for effective

effective


adj.

late 14c., from French effectif, from Latin effectivus "productive, effective," from effect-, stem of efficere (see effect (n.)). Effectively in the sense of "actually" is attested by 1650s. Related: Effectivity.

Online Etymology Dictionary, © 2010 Douglas Harper