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efficiency

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noun [uncountable] British English pronunciation: efficiency /ɪˈfɪʃ(ə)nsi/ 
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singularefficiency
pluralefficiencies
  1. the ability to work well and produce good results by using the available time, money, supplies etc in the most effective way

    the search for lower costs and greater efficiency

    The inspectors were impressed by the speed and efficiency of the new system.

    improve/increase efficiency:

    The new technology is aimed at improving efficiency and customer service.

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