Webster 1913 Edition
The quality of being efficient or producing an effect or effects; efficient power; effectual agency.
The manner of this divine
efficiencybeing far above us.
The ratio of useful work to energy expended.
efficiency of a heat engine,
the ratio of the work done by an engine, to the work due to the heat supplied to it.
efficiency (countable and uncountable, plural efficiencies)
- The extent to which time is well used for the intended task.
- The efficiency of the planning department is deplorable.
- (dated) The quality of producing an effect or effects.
- The manner of this divine efficiency being far above us.
- The extent to which a resource, such as electricity, is used for the intended purpose; the ratio of useful work to energy expended.
- The efficiency of this loudspeaker is 40%.
- (United States) A one-room apartment.
- I have an efficiency available June through July.
- fully-furnished efficiencies
Terms derived from efficiency
- (Britain, Ireland) bedsit
extent to which time is well used
extent to which a resource is used for the intended purpose