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efficiency

Pronunciation: /ɪˈfɪʃ.ən.si/

The English word “efficiency” has 5 meanings listed here.

noun

  1. The extent to which a resource is used for the intended purpose.
  2. The ratio of useful work to energy expended. Often given the symbol η.
  3. The extent to which time is well used for the intended task.
  4. The quality of producing an effect or effects.
  5. A one-room apartment.

Etymology

From Latin efficientia, equivalent to efficient + -cy.

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.