affect - definition in the Learner's Dictionary - Cambridge Dictionaries Online

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English definition of “affect”

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affect

verb [T]
 
 
/əˈfekt/
CAUSE CHANGE B2 to influence someone or something, or cause them to change: It's a disease which affects many older people. The building was badly affected by the fire.ChangingAdapting and modifying Adapting and attuning to somethingChanging frequentlyAffecting and influencing
CAUSE EMOTION B2 to cause a strong emotion, especially sadness: [often passive] I was deeply affected by the film.Making people sad, shocked and upsetStrong feelings
(Definition of affect from the Cambridge Learners Dictionary © Cambridge University Press)
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