effective

ef-fec-tive · adjective

imported

Definitions

adjective

  1. 1.

    Successful in producing a desired or intended result.

  2. 2.

    (Of a law, policy, or system) operative; in effect.

  3. 3.

    Actually in existence or operational, as opposed to theoretical.

Phrases & expressions

  • •
    effective immediately — starting right now
  • •
    cost-effective — economically worthwhile
  • •
    effective date — the date when something becomes operative

Related words

Antonyms: futile, ineffective, useless
See also: effect, effectively, efficient
Synonyms: efficient, potent, productive, successful

Etymology

From Latin effectivus ("creative, productive"), from effectus, past participle of efficere ("to accomplish"), from ex- ("out") + facere ("to do, make").