efficiency
noun
ef·fi·cien·cy
i-ˈfi-shən-sē 
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
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 on the Web
Liquid cooling technology, implemented in Ironwood, delivers substantially higher thermal efficiency compared to conventional air cooling, enabling chips to operate at higher frequencies without thermal throttling.
—
Maribel Lopez, Forbes.com, 15 Apr. 2025
Other strategies to explore include boosting local food production to cut waste and streamlining supply chains for better efficiency and recycling.
—Ryan Nawrocki, Baltimore Sun, 13 Apr. 2025
This wide array of automobile excellence displays how the automotive industry has transformed from usage to power, comfort, luxury or efficiency.
—Marc D. Grasso, New York Daily News, 13 Apr. 2025
These types of systems often employ custom parts for cost, size, and efficiency reasons, which makes buying aftermarket parts down the line either more difficult or impossible.
—PC Magazine, 12 Apr. 2025
See All Example Sentences for efficiency
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Maribel Lopez, Forbes.com, 15 Apr. 2025
Other strategies to explore include boosting local food production to cut waste and streamlining supply chains for better efficiency and recycling.
—Ryan Nawrocki, Baltimore Sun, 13 Apr. 2025
This wide array of automobile excellence displays how the automotive industry has transformed from usage to power, comfort, luxury or efficiency.
—Marc D. Grasso, New York Daily News, 13 Apr. 2025
These types of systems often employ custom parts for cost, size, and efficiency reasons, which makes buying aftermarket parts down the line either more difficult or impossible.
—PC Magazine, 12 Apr. 2025
See All Example Sentences for efficiency
Cite this Entry
“Efficiency.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/efficiency. Accessed 20 Apr. 2025.
Copy CitationKids Definition
efficiency
noun
ef·fi·cien·cy
i-ˈfish-ən-sē
plural efficiencies
1
: the quality or degree of being efficient
2
: efficient operation
3
: the ratio of the useful energy delivered by a machine to the energy supplied to it
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