efficiency
/ɪˈfɪʃ.ən.si/ noun
Forms efficiencies
- noun The extent to which a resource is used for the intended purpose.
- noun (engineering, physics) The ratio of useful work to energy expended. Often given the symbol η. “The efficiency of this loudspeaker is 40%.”
- noun The extent to which time is well used for the intended task. “The efficiency of the planning department is deplorable.”
- noun (dated) The quality of producing an effect or effects.
- noun (US) A one-room apartment. “I have an efficiency available June through July.”
Synonyms
Antonyms
Etymology
From Latin efficientia, equivalent to efficient + -cy.
Webster’s 1913
- noun The quality of being efficient or producing an effect or effects; efficient power; effectual agency.
- noun The ratio of useful work to energy expended. Rankine.
Etymology [L. efficientia.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “efficiency”, CC BY-SA 4.0. Details