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late 14c., "a result," from Old French efet (13c., Modern French effet) "result, execution, completion, ending," from Latin effectus "accomplishment, performance," from past participle stem of efficere "work out, accomplish," from ex- "out" (see ex-) + facere "to do" (see factitious).
Meaning "impression produced on the beholder" is from 1736. Sense in stage effect, sound effect, etc. first recorded 1881. The verb is from 1580s. Related: Effecting; effection.
effect ef·fect (ĭ-fěkt')
Something brought about by a cause or an agent; a result.
The power to produce an outcome or achieve a result; influence.
A scientific law, hypothesis, or phenomenon.
The condition of being in full force or execution.
Something that produces a specific impression or supports a general design or intention.
To bring into existence.
To produce as a result.
To bring about.