effective - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “effective”

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effective

adjective  us   /ɪˈfek·tɪv/

effective adjective (PRODUCING RESULTS)

producing the intended results, or (of a person) skilled or able to do something well: an effective policy/strategy We’ve found that giving away samples of our product is the most effective way to promote it. She’s an effective administrator and knows how to get things done.

effective adjective (IN USE)

(of rules or laws) in official or legal use: The law becomes effective next month.
(Definition of effective from the Cambridge Academic Content Dictionary © Cambridge University Press)
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