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English definition of “effective”

effective

adjective [before noun] (IN FACT)    /ɪˈfek.tɪv/
in fact , although not officially : Although she's not officially our boss , she's in effective control of the office .True, real, false, and unreal Grammar:Efficient or effective?Efficient and effective are adjectives.
(Definition of effective adjective (IN FACT) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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