- 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.
- efficiency apartment.
Origin of efficiency
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for efficiency
And increasingly smart navigation aids in the cockpit brought far greater precision and efficiency to route planning.Flight 8501 Poses Question: Are Modern Jets Too Automated to Fly?
January 4, 2015
Second,” said Sen. Paul, “is the Milton Friedman efficiency argument.My Coffee Klatch With Rand Paul
P. J. O’Rourke
September 27, 2014
Efficiency may seem a pitiless term to use but it does have meaning.Blood and War: The Hard Truth About ‘Boots on the Ground’
September 22, 2014
Her candor and efficiency are refreshing, especially on the once-grungy, now-trendy Orchard Street.New York's Sexiest Kosher Corsets
August 20, 2014
The loss of Scottish bases would have “a disproportionate” impact on efficiency, he said.Britain's High-Tech New Plan to Rule the Waves
August 14, 2014
Much of the efficiency of the motor is due to the form and gearing of the propeller.Flying Machines
W.J. Jackman and Thos. H. Russell
He has discharged the duties of this office for four years with ability and efficiency.Cleveland Past and Present
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.
- 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
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.