noun, plural ef·fi·cien·cies.
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;Related formsnon·ef·fi·cien·cy, nounsu·per·ef·fi·cien·cy, noun, plural su·per·ef·fi·cien·cies.
< Latin efficientia,
equivalent to efficient-
) + -ia -y3
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Related Words for efficiencyreadiness
Examples from the Web for efficiency
Contemporary Examples of efficiency
And increasingly smart navigation aids in the cockpit brought far greater precision and efficiency to route planning.
Second,” said Sen. Paul, “is the Milton Friedman efficiency argument.
Efficiency may seem a pitiless term to use but it does have meaning.
Her candor and efficiency are refreshing, especially on the once-grungy, now-trendy Orchard Street.
The loss of Scottish bases would have “a disproportionate” impact on efficiency, he said.
Historical Examples of efficiency
Much of the efficiency of the motor is due to the form and gearing of the propeller.
He has discharged the duties of this office for four years with ability and efficiency.
And by degrees I made for myself a new god, and its name was Efficiency.
That's more important to you and me than all the efficiency gods on earth.
You've pictured one spot of efficiency in a whole dreary desert of waste.
British Dictionary definitions for efficiency
noun plural -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 percentageSee 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
Word Origin and History for efficiency
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
The production of the desired effects or results with minimum waste of time, effort, or skill.
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.
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.
The ratio of the effective or useful output to the total input in any system.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.