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
Cook enjoyed a career year that boasted efficiency and saw his touchdowns triple from 2023 (6) to 2024 (18).
—
The Athletic Nfl Staff, New York Times, 8 July 2025
Private equity firms have also circled some linear assets in recent years, looking to leverage their recurring subscription revenues and proficiencies in finding efficiencies.
—Alex Weprin, HollywoodReporter, 8 July 2025
Organizations like the Partnership on AI provide platforms for multi-stakeholder dialogue on ethics, efficiency and environmental impact.
—Somdip Dey, Forbes.com, 8 July 2025
Beyond the raw speed and power, there are significant software, hardware, and efficiency updates, and new features, like the Kick Turn, which can make low-degree turns on tight trails and do 360s on a flat surface.
—Erik Shilling, Robb Report, 8 July 2025
See All Example Sentences for efficiency
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The Athletic Nfl Staff, New York Times, 8 July 2025
Private equity firms have also circled some linear assets in recent years, looking to leverage their recurring subscription revenues and proficiencies in finding efficiencies.
—Alex Weprin, HollywoodReporter, 8 July 2025
Organizations like the Partnership on AI provide platforms for multi-stakeholder dialogue on ethics, efficiency and environmental impact.
—Somdip Dey, Forbes.com, 8 July 2025
Beyond the raw speed and power, there are significant software, hardware, and efficiency updates, and new features, like the Kick Turn, which can make low-degree turns on tight trails and do 360s on a flat surface.
—Erik Shilling, Robb Report, 8 July 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 18 Jul. 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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