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efficiency

efficiency definition

ef·fi·ciency (e fis̸h′ən sē, i-)

noun pl. efficiencies -·cies

ability to produce a desired effect, product, etc. with a minimum of effort, expense, or waste; quality or fact of being efficient
the ratio of effective work to the energy expended in producing it, as of a machine; output divided by input
☆ efficiency apartment

Etymology: L efficientia: see efficient

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.