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English definition of “efficient”

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efficient

adjective uk   /ɪˈfɪʃ.ənt/ us  
B1 working or operating quickly and effectively in an organized way: The city's transport system is one of the most efficient in Europe. We need someone really efficient who can organize the office and make it run smoothly.
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efficiently
adverb uk   /-li/ us  
B2 She runs the business very efficiently.
(Definition of efficient from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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