efficiency

noun ef·fi·cien·cy \ i-ˈfi-shən-sē \

|Updated on: 18 Jul 2018

Examples: efficiency in a Sentence

Definition of efficiency

plural efficiencies

1 : the quality or degree of being efficient

2 a : 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

3 : efficiency apartment

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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.

Recent Examples of efficiency from the Web

Future work should seek to improve efficiency, as well as understand why the technique doesn’t work in male mice, Thomas adds.

— ewen callaway, Scientific American, "Controversial CRISPR “Gene Drives” Tested in Mammals for the First Time," 10 July 2018
The engine can run with up to 99.8% efficiency, Elouard and Jordan calculate.

— adrian cho, Science | AAAS, "Quantum measurements could power a tiny, hyper-efficient engine," 10 July 2018
Weatherization work can, as far as energy efficiency, put older homes on par with newer construction, according to the group.

— mike nolan, Daily Southtown, "Free energy-saving upgrades available for some Oak Forest homeowners," 7 July 2018
Susan Rochford, the vice president of energy efficiency, sustainability, and public policy at Legrand North and Central America, explained how the company achieved the LEED score of 48 points across the five categories.

— michael walsh, Courant Community, "Legrand Receives LEED Certification From U.S. Green Building Council," 2 July 2018
Tesla is also continuing to experiment with other possible efficiencies, including testing robots at speeds higher than they’re rated for.

— david z. morris, Fortune, "The Agility, Persistence, and Pain Behind Tesla’s Model 3 Manufacturing Turnaround," 1 July 2018
To achieve improved efficiency, the Wendelstein 7-X was outfitted with a new interior wall of graphite tiles, allowing higher temperatures to be reached.

— jay bennett, Popular Mechanics, "German Nuclear Fusion Experiment Sets Records for Stellarator Reactor," 26 June 2018
In addition to supporting Android apps on Chromebooks, the OP1 chip in the Chromebook Tab 10 is supposed to excel at power efficiency, quick network connectivity, and smooth multitasking when using numerous apps.

— valentina palladino, Ars Technica, "Acer Chromebook Tab 10 review: Chrome OS revives Google’s tablet future," 23 June 2018
In addition to replacing the original roof, which was built in 1996, the work will include installing high-efficiency toilets and low-flow water fixtures to allow for better drainage.

— jill howardchurch, ajc, "Renovations planned for Fayette library," 20 June 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.

First Known Use of efficiency

1633

in the meaning defined at sense 1

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efficiency Synonyms

EFFICIENCY Defined for English Language Learners

efficiency

noun

Definition of efficiency for English Language Learners

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