efficiency

Pronunciation

• IPA: /ɪˈfɪʃn̩si/

Noun

efficiency (countable and uncountable, plural efficiencies)

1. The extent to which time is well used for the intended task.
   • Antonyms: inefficiency, wastefulness
   • The efficiency of the planning department is deplorable.
2. (dated) The quality of producing an effect or effects.
3. The extent to which a resource is used for the intended purpose; the ratio of useful work to energy expended.
   • Antonyms: inefficiency, wastefulness
   • The efficiency of this loudspeaker is 40%.
4. (US) A one-room apartment.
   • Synonyms: efficiency apartment, studio apartment, (UK, Ireland) bedsit
   • I have an efficiency available June through July.
   • fully-furnished efficiencies