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
Artificial intelligence is transforming the underwriting landscape by dramatically increasing speed, accuracy and efficiency.
—
Andrew Curtis, Forbes, 10 Mar. 2025
And for an administration that says it's focused on reducing waste and improving efficiency, that is unacceptable.
—William Lambers, Newsweek, 10 Mar. 2025
Despite relying on 3-pointers to a fault in the early months of the season, the Bulls have struggled to maintain their shooting volume and efficiency after trading away Zach LaVine.
—Julia Poe, Chicago Tribune, 9 Mar. 2025
For those who don’t have this luxury, there are several local and state loan programs that work for low- and moderate-income homeowners, some of which are funded by Empower Maryland, the state’s energy efficiency program.
—Ben Roush, Baltimore Sun, 9 Mar. 2025
See All Example Sentences for efficiency
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Andrew Curtis, Forbes, 10 Mar. 2025
And for an administration that says it's focused on reducing waste and improving efficiency, that is unacceptable.
—William Lambers, Newsweek, 10 Mar. 2025
Despite relying on 3-pointers to a fault in the early months of the season, the Bulls have struggled to maintain their shooting volume and efficiency after trading away Zach LaVine.
—Julia Poe, Chicago Tribune, 9 Mar. 2025
For those who don’t have this luxury, there are several local and state loan programs that work for low- and moderate-income homeowners, some of which are funded by Empower Maryland, the state’s energy efficiency program.
—Ben Roush, Baltimore Sun, 9 Mar. 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 13 Mar. 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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