effect.
The result or outcome of a cause.
Meaning & usage
The result or outcome of a cause.
The effect of the hurricane was a devastated landscape.
Impression left on the mind; sensation produced.
Execution; performance; realization; operation.
Execution; performance; realization; operation. The state of being binding and enforceable, as in a rule, policy, or law.
The new law will come into effect on the first day of next year.
An illusion produced by technical means (as in "special effect")
The effect of flying was most convincing.
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.
A scientific phenomenon, usually named after its discoverer.
Doppler effect
An influence or causal association between two variables.
effect size
therapeutic effect
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.
Consequence intended; purpose; meaning; general intent; with to.
Reality; actual meaning; fact, as distinguished from mere appearance.
Manifestation; expression; sign.
Where this word comes from
Etymology tree Proto-Indo-European *h₁éǵʰ Proto-Indo-European *-s Proto-Indo-European *h₁éǵʰs Proto-Italic *eks Latin ex Latin ex- Proto-Indo-European *dʰeh₁- Proto-Indo-European *dʰeh₁k- Proto-Indo-European *-yéti Proto-Indo-European *dʰh₁kyéti Proto-Italic *θakjō Proto-Italic *fakjō Latin faciō Latin efficiō Proto-Indo-European *-tus Proto-Italic *-tus Latin -tus Latin effectuslbor. Old French effectbor. Middle English effect English effect Of the noun: from Middle English effect, from Old French effect (modern French effet), from Latin effectus (“an effect, tendency, purpose”), from efficiō (“accomplish, complete, effect”); see effect as a verb. Displaced Old English fremming, fremednes from fremman. Etymology tree Proto-Indo-European *h₁éǵʰ Proto-Indo-European *-s Proto-Indo-European *h₁éǵʰs Proto-Italic *eks Latin ex Latin ex- Proto-Indo-European *dʰeh₁- Proto-Indo-European *dʰeh₁k- Proto-Indo-European *-yéti Proto-Indo-European *dʰh₁kyéti Proto-Italic *θakjō Proto-Italic *fakjō Latin faciō Latin efficiō Proto-Indo-European *-tus Proto-Italic *-tus Latin -tus Latin effectus Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-yéti Proto-Indo-European *-eh₂yéti Proto-Indo-European *-h₂tiinflu. Proto-Italic *-ājō Proto-Italic *-āō Latin -ō Medieval Latin effectuōder. Middle English effecten English effect Of the verb: from Middle English effecten, partly from Medieval Latin effectuō, from Latin effectus, perfect passive participle of efficiō (“accomplish, complete, do, effect”), from ex (“out”) + faciō (“do, make”) (see fact and compare affect, infect) and partly from the noun effect.
To make or bring about; to implement.
The best way to effect change is to work with existing stakeholders.
The election has affected our society, for it has effected major changes in the government.
Misspelling of affect.
Where this word comes from
Etymology tree Proto-Indo-European *h₁éǵʰ Proto-Indo-European *-s Proto-Indo-European *h₁éǵʰs Proto-Italic *eks Latin ex Latin ex- Proto-Indo-European *dʰeh₁- Proto-Indo-European *dʰeh₁k- Proto-Indo-European *-yéti Proto-Indo-European *dʰh₁kyéti Proto-Italic *θakjō Proto-Italic *fakjō Latin faciō Latin efficiō Proto-Indo-European *-tus Proto-Italic *-tus Latin -tus Latin effectuslbor. Old French effectbor. Middle English effect English effect Of the noun: from Middle English effect, from Old French effect (modern French effet), from Latin effectus (“an effect, tendency, purpose”), from efficiō (“accomplish, complete, effect”); see effect as a verb. Displaced Old English fremming, fremednes from fremman. Etymology tree Proto-Indo-European *h₁éǵʰ Proto-Indo-European *-s Proto-Indo-European *h₁éǵʰs Proto-Italic *eks Latin ex Latin ex- Proto-Indo-European *dʰeh₁- Proto-Indo-European *dʰeh₁k- Proto-Indo-European *-yéti Proto-Indo-European *dʰh₁kyéti Proto-Italic *θakjō Proto-Italic *fakjō Latin faciō Latin efficiō Proto-Indo-European *-tus Proto-Italic *-tus Latin -tus Latin effectus Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-yéti Proto-Indo-European *-eh₂yéti Proto-Indo-European *-h₂tiinflu. Proto-Italic *-ājō Proto-Italic *-āō Latin -ō Medieval Latin effectuōder. Middle English effecten English effect Of the verb: from Middle English effecten, partly from Medieval Latin effectuō, from Latin effectus, perfect passive participle of efficiō (“accomplish, complete, do, effect”), from ex (“out”) + faciō (“do, make”) (see fact and compare affect, infect) and partly from the noun effect.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.