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
Companies can achieve this level of efficiency and responsiveness within their supply chains.
—
Viral Hirpara, Forbes.com, 9 May 2025
Its homes, which can be customized by combining various-sized modules, range from one to four bedrooms and are solar-powered, built to maximize thermal efficiency and indoor air quality.
—Sam Lubell, Los Angeles Times, 9 May 2025
Enhancing the efficiency, effectiveness, and accountability of treatment delivery, investing in health care workers and infrastructure, leveraging advances in technology, and engaging the diaspora to invest in the ecosystem will expedite this transition to full self-sufficiency.
—Ndidi Okonkwo Nwuneli, Time, 8 May 2025
This is the week to experiment with new rhythms that give you more energy, not just more efficiency.
—Colin Bedell, Them., 8 May 2025
See All Example Sentences for efficiency
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Viral Hirpara, Forbes.com, 9 May 2025
Its homes, which can be customized by combining various-sized modules, range from one to four bedrooms and are solar-powered, built to maximize thermal efficiency and indoor air quality.
—Sam Lubell, Los Angeles Times, 9 May 2025
Enhancing the efficiency, effectiveness, and accountability of treatment delivery, investing in health care workers and infrastructure, leveraging advances in technology, and engaging the diaspora to invest in the ecosystem will expedite this transition to full self-sufficiency.
—Ndidi Okonkwo Nwuneli, Time, 8 May 2025
This is the week to experiment with new rhythms that give you more energy, not just more efficiency.
—Colin Bedell, Them., 8 May 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 17 May. 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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