effect noun - definition in the Learner's Dictionary - Cambridge Dictionaries Online

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English definition of “effect”

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effect

noun
 
 
/ɪˈfekt/
B1 [C, U] a change, reaction, or result that is caused by something: The accident had a huge effect on her life. We don't know the long-term effects of this drug.Outcomes and consequences
in effect used to say what the real situation is: This means, in effect, that the plan has been scrapped.Reality and truth
come/go into effect to start being used: New food safety rules come into effect on Monday.Starting and beginningStarting again
take effect B2 to start to produce results or changes: The anaesthetic takes effect in about ten minutes.Outcomes and consequences
to that effect used to say that you are giving the general meaning of something but not the exact words: He said he was bored with school or something to that effect.Approximate
a sound/special/visual, etc effect B1 a sound, image, etc that is created artificially →  See also side effect Production, direction and recording
(Definition of effect noun from the Cambridge Learners Dictionary © Cambridge University Press)
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