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
Synonyms
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
These efficiencies allow professionals to focus on higher-value activities, such as mentoring students or driving innovation.
—
Dr. Aviva Legatt, Forbes, 21 Jan. 2025
The Lions ran the ball with authority, passed it with panache and ranked in the top five in the league in both third-down efficiency and red zone production.
—Dan Wiederer, Chicago Tribune, 21 Jan. 2025
Tyrese Maxey is still scoring at volume, but his efficiency has struggled for a team hurdling toward 50 losses.
—Law Murray, The Athletic, 21 Jan. 2025
The idea of slowing down and focusing on fewer activities can clash with a busy routine that is geared toward productivity and efficiency.
—Alex Vance, Parents, 21 Jan. 2025
See all Example Sentences for efficiency 
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Dr. Aviva Legatt, Forbes, 21 Jan. 2025
The Lions ran the ball with authority, passed it with panache and ranked in the top five in the league in both third-down efficiency and red zone production.
—Dan Wiederer, Chicago Tribune, 21 Jan. 2025
Tyrese Maxey is still scoring at volume, but his efficiency has struggled for a team hurdling toward 50 losses.
—Law Murray, The Athletic, 21 Jan. 2025
The idea of slowing down and focusing on fewer activities can clash with a busy routine that is geared toward productivity and efficiency.
—Alex Vance, Parents, 21 Jan. 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 26 Jan. 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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