Definition of efficiency in English:

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Pronunciation: /ɪˈfɪʃ(ə)nsi/

noun (plural efficiencies)

[mass noun]
1The state or quality of being efficient: greater energy efficiency
More example sentences
  • Sri Lanka has identified health as an area where information technology should be used to boost efficiency and service quality.
  • The nation's translation industry is often criticized for its poor quality and lack of efficiency.
  • He spends most of his time assessing quality and efficiency at the plant.
organization, order, orderliness, planning, regulation, logicality, coherence, productivity, effectiveness, cost-effectiveness
competence, capability, ability, proficiency, adeptness, deftness, expertise, professionalism, skilfulness, skill, effectiveness, productivity, organization
1.1 [count noun] An action designed to achieve efficiency: the reforms will lead to efficiencies and savings
More example sentences
  • Some projects which were funded simply achieved budgetary efficiencies, he said, and did not require as much money as had been first thought.
  • Mr Prendergast said a constant and ongoing review is in place at Lakeland to identify where further operating efficiencies can be achieved.
  • Environmental management can achieve efficiencies in how we operate at a business level, with resulting bottom line benefits.
1.2 [count noun] technical The ratio of the useful work performed by a machine or in a process to the total energy expended or heat taken in: the boiler has an efficiency of 45 per cent
More example sentences
  • They emit no pollutants and have impressive energy efficiencies.
  • Chiller energy efficiencies have steadily climbed over the past years.
  • They appeal because of the very high energy efficiencies they offer and the lack of environmental impact.


Late 16th century (in the sense 'the fact of being an efficient cause'): from Latin efficientia, from efficere 'accomplish' (see effect).

Words that rhyme with efficiency

proficiency, sufficiency
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