Definition of efficiency in English:

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Pronunciation: /əˈfiSHənsē/

noun (plural efficiencies)

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, regulation, coherence;
productivity, effectiveness
competence, capability, ability, proficiency, adeptness, expertise, professionalism, skill, effectiveness
1.1An action designed to achieve this: to increase efficiencies and improve earnings
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 technical The ratio of the useful work performed by a machine or in a process to the total energy expended or heat taken in.
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.
1.3 short for efficiency apartment.


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

For editors and proofreaders

Syllabification: ef·fi·cien·cy

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