Definition of "effect" in English

noun

1. The result or outcome of a cause.

   • The effect of the hurricane was a devastated landscape.

2. Impression left on the mind; sensation produced.

3. Execution; performance; realization; operation.

4. (cinematography, computer graphics, demoscene) An illusion produced by technical means (as in "special effect")

   • The effect of flying was most convincing.

5. (sound engineering) An alteration, or device for producing an alteration, in sound after it has been produced by an instrument.

   • I use an echo effect here to make the sound more mysterious.
   • I just bought a couple of great effects.

6. (sciences) A scientific phenomenon, usually named after its discoverer.

   • Doppler effect

7. (sciences, statistics) An influence or causal association between two variables.

   • effect size
   • therapeutic effect

8. (usually in the plural) Belongings, usually as personal effects.

   • The tenant shall pay for the repair of, or replace all such items of the fixtures, fittings, furniture and effects as shall be broken, lost, damaged or destroyed during that time.

9. Consequence intended; purpose; meaning; general intent; with to.

10. (obsolete) Reality; actual meaning; fact, as distinguished from mere appearance.

11. (obsolete) Manifestation; expression; sign.

verb

1. (transitive) To make or bring about; to implement.

   • The best way to effect change is to work with existing stakeholders.

2. Misspelling of affect.