What is the difference between effective and efficient?

Be Careful! Effective and efficient are often confused, but they have slightly different meanings. If you are effective, you do a job properly; ... EnglishDictionary Thesaurus WordLists Grammar EnglishEasyLearningGrammar GrammarPatterns EnglishUsage TeachingResources VideoGuides Conjugations Quiz Englishgrammar Englishcollocations Englishconfusables Englishidioms Englishusage Thematicwordlists English French German Italian Spanish Portuguese Hindi Chinese effective Share× Credits× Whatisthedifferencebetweeneffectiveandefficient?1 `effective'Ifsomeoneorsomethingiseffective,theydosomethingwellandproducetheresultsthatwereintended.Weneedeffectivestreetlighting.Simpleantibioticsareeffectiveagainstthisvirus.Shewasveryeffectiveingettingpeopletocommunicate.2 `efficient'Ifsomeoneorsomethingisefficient,theydoajobwellandsuccessfully,withoutwastingtimeorenergy.Youneedahighlyefficientproductionmanagerifyouwanttoreducecosts.Enginesandcarscanbemademoreefficient.BeCareful!Effectiveandefficientareoftenconfused,buttheyhaveslightlydifferentmeanings.Ifyouareeffective,youdoajobproperly;ifyouareefficient,youdoitquicklyandeasily.Doingresearchatthelibrarycanbeeffective,butusingtheinternetisoftenmoreefficient.Copyright©byHarperCollinsPublishers.Allrightsreserved. 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easy-easily effective-efficient electric-electrical-electronic emigration-immigration-migration employ-use especially-specially eventually-finally everyday-everyday everyone-everybody exam-examination excited-exciting exhausted-exhausting-exhaustive experience-experiment explode-blowup fair-fairly female-feminine few-afew fine-finely first-firstly firstname-Christianname-forename-givenname fit-suit flat-apartment floor-ground forward-forwards free-freely frighten-frightened fun-funny gain-earn gas-petrol generally-mainly getto-growto glad-happy-cheerful gointo-getinto-geton good-well goout-getout-getoff groundfloor-firstfloor habit-custom half-halfof hard-hardly have-take he-she-they heap-stack-pile high-tall hire-rent-let holiday-vacation homework-housework ill-sick illness-disease indicate-show indoors-indoor industrious-industrial information-news inspiteof-despite instead-insteadof interested-interesting its-it's journey-trip-voyage-excursion last-lastly late-lately latter-former 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