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[ih-fish-uh n-see] /ɪˈfɪʃ ən si/
noun, plural efficiencies.
the state or quality of being efficient, or able to accomplish something with the least waste of time and effort; competency in performance.
accomplishment of or ability to accomplish a job with a minimum expenditure of time and effort:
The assembly line increased industry's efficiency.
the ratio of the work done or energy developed by a machine, engine, etc., to the energy supplied to it, usually expressed as a percentage.
Origin of efficiency
1585-95; < Latin efficientia, equivalent to efficient- (see efficient) + -ia -y3
Related forms
nonefficiency, noun
superefficiency, noun, plural superefficiencies. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for efficiencies
  • These kinds of gestures are unlikely to be welcomed in cultures built around engineering efficiencies.
  • Further, the additional scale should bring some manufacturing efficiencies.
  • Cookies aren't the organization's first foray into the bold world of business efficiencies.
  • The efficiencies of global travel have enhanced the ways that plant disease can spread.
  • And they are using environmental issues to promote new thinking, new efficiencies, and new growth.
  • And those mom-and-pop operations also aren't able to achieve the crucial economies of scale that create efficiencies.
  • It's a commitment that's paid for in part by efficiencies in our system that are long overdue.
  • And the threshold at which scraps become meals drops all the time, because technology keeps creating new efficiencies.
  • As a result, prices will skyrocket while efficiencies will not.
  • Participates in cross functional teams and groups, providing guidance and suggestions to improve efficiencies.
British Dictionary definitions for efficiencies


noun (pl) -cies
the quality or state of being efficient; competence; effectiveness
the ratio of the useful work done by a machine, engine, device, etc, to the energy supplied to it, often expressed as a percentage See also thermal efficiency
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for efficiencies



1590s, "power to accomplish something," from Latin efficientia (from efficientem; see efficient) + -cy. In mechanics, "ratio of useful work done to energy expended," from 1858. Attested from 1952 as short for efficiency apartment (itself from 1930).

Online Etymology Dictionary, © 2010 Douglas Harper
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efficiencies in Medicine

efficiency ef·fi·cien·cy (ĭ-fĭsh'ən-sē)

  1. The production of the desired effects or results with minimum waste of time, effort, or skill.

  2. A measure of effectiveness; specifically, the useful work output divided by the energy input in any system.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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efficiencies in Science
  1. The ratio of the energy delivered (or work done) by a machine to the energy needed (or work required) in operating the machine. The efficiency of any machine is always less than one due to forces such as friction that use up energy unproductively. See also mechanical advantage.

  2. The ratio of the effective or useful output to the total input in any system.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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