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efficiency

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efficiencyˈfɪʃənsi/noun
pluralefficiencies
efficiency
ˈfɪʃənsi/
noun
pluralefficiencies
Learner's definition of EFFICIENCY  
: the ability to do something or produce something without wasting materials, time, or energy: the quality or degree of being efficient
[noncount]
[plural]technical
[count]US 
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