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
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
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 14 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share