American English

Definition of efficient adjective from the Oxford Advanced American Dictionary



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 doing something well and thoroughly with no waste of time, money, or energy an efficient worker efficient heating equipment the efficient use of energy We offer a fast, friendly and efficient service. As we get older, our bodies become less efficient at burning up calories. fuel-efficient cars (= that do not use much fuel) opposite inefficient
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adverb a very efficiently organized event
See the Oxford Advanced Learner's Dictionary entry: efficient

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