efficiency

noun
ef·​fi·​cien·​cy | \i-ˈfi-shən-sē \
plural efficiencies

Definition of efficiency 

1 : the quality or degree of being efficient

2a : efficient operation

b(1) : effective operation as measured by a comparison of production with cost (as in energy, time, and money)

(2) : the ratio of the useful energy delivered by a dynamic system to the energy supplied to it

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Examples of efficiency in a Sentence

Because of her efficiency, we got all the work done in a few hours. The factory was operating at peak efficiency. A furnace with 80 percent fuel efficiency wastes 20 percent of its fuel. The company is trying to lower costs and improve efficiencies.
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Recent Examples on the Web

Yeah, there probably will be efficiencies that result from a larger operation, and maybe technological or service innovations that represent improvements. David Lazarus, latimes.com, "When companies say a merger will result in lower prices, try laughing in their face," 10 July 2018 Louisville City demonstrated O'Connor-like efficiency and opened the scoring inside the 10-minute mark after George Davis IV was tripped up near the kickoff circle. Danielle Lerner, The Courier-Journal, "James O'Connor is leaving LouCity but his legacy will last forever," 1 July 2018 Toyota said the Eco mode reduces overall energy consumption by adjusting the climate control system and throttle to maximize efficiency. G. Chambers Williams Iii, Houston Chronicle, "COMPACT," 13 July 2018 His game marries crisp efficiency with technical flair, but his biggest asset is his soccer brain, the ability to see angles and passes and movement that others don’t. Martin Rogers, USA TODAY, "After World Cup, Cristiano Ronaldo and Lionel Messi may lose best player tags," 13 July 2018 But MacFarlane has found a way to boost efficiencies by changing the electrolyte. Robert F. Service, Science | AAAS, "Ammonia—a renewable fuel made from sun, air, and water—could power the globe without carbon," 12 July 2018 The lack of a cab allows for more hauling capacity, as well as more efficiency out of the vehicle’s all-electric motor, Einride says. Andrew J. Hawkins, The Verge, "This electric driverless logging truck can carry up to 16 tons of timber," 12 July 2018 DIUx is involved in a wide range of areas aimed at expanding the Pentagon’s tech capabilities while also introducing efficiencies that could save the agency money over time. Christopher Carbone, Fox News, "'Blade Runner' becomes reality? Two flying taxi startups get Pentagon funding," 11 July 2018 Capturing dedicated consumers and preparing for a potential price crash make efficiency a top concern for any cultivator. Dan Adams, BostonGlobe.com, "The hidden, high-tech world of communications at Fenway Park," 10 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'efficiency.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of efficiency

1633, in the meaning defined at sense 1

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Last Updated

7 Nov 2018

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Time Traveler for efficiency

The first known use of efficiency was in 1633

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More Definitions for efficiency

efficiency

noun

English Language Learners Definition of efficiency

: the ability to do something or produce something without wasting materials, time, or energy : the quality or degree of being efficient ( technical )

efficiency

noun
ef·​fi·​cien·​cy | \i-ˈfi-shən-sē \
plural efficiencies

Kids Definition of efficiency

: the ability to do something or produce something without waste

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