en·​er·​gy | \ ˈe-nər-jē How to pronounce energy (audio) \
plural energies

Definition of energy

1a : dynamic quality narrative energy
b : the capacity of acting or being active intellectual energy
c : a usually positive spiritual force the energy flowing through all people
2 : vigorous exertion of power : effort investing time and energy
3 : a fundamental entity of nature that is transferred between parts of a system in the production of physical change within the system and usually regarded as the capacity for doing work
4 : usable power (such as heat or electricity) also : the resources for producing such power

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Synonyms for energy


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Choose the Right Synonym for energy

power, force, energy, strength, might mean the ability to exert effort. power may imply latent or exerted physical, mental, or spiritual ability to act or be acted upon. the awesome power of flowing water force implies the actual effective exercise of power. used enough force to push the door open energy applies to power expended or capable of being transformed into work. a worker with boundless energy strength applies to the quality or property of a person or thing that makes possible the exertion of force or the withstanding of strain, pressure, or attack. use weight training to build your strength might implies great or overwhelming power or strength. the belief that might makes right

Examples of energy in a Sentence

The kids are always so full of energy. They devoted all their energy to the completion of the project. They devoted all their energies to the completion of the project. She puts a lot of energy into her work. The newer appliances conserve more energy.
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Recent Examples on the Web As a result, she's been able to allocate more of her energy to the other things that matter to her like fashion, activism, and reconnecting with her roots. Ineye Komonibo,, 20 July 2021 Many investors focus on renewable projects, underappreciating the climate benefits from industries like manufacturing becoming more energy efficient and producing parts locally, Mr. Kimmelman said. Amrith Ramkumar, WSJ, 19 July 2021 The executive director added that energy-efficient materials, like structural insulated panels, take more time to install. Leia Larsen, The Salt Lake Tribune, 19 July 2021 His good ol’ boy baritone is intact; so are his energy and playful spirit. Matthew J. Palm,, 19 July 2021 This will also, in turn, make buildings more energy-efficient. Manavi Kapur, Quartz, 18 July 2021 Merkel reaffirmed her support for an infrastructure bank, a Biden proposal to have the world’s largest democracies offer financing to developing countries as a more transparent and energy-efficient alternative to Beijing’s Belt and Road Initiative. Eli Stokols Staff Writer, Los Angeles Times, 15 July 2021 The plaintiffs argue that the fee targets solar users unfairly in comparison to customers who lower their electricity use in other ways, such as installing more energy efficient lighting or appliances, and is therefore discriminatory. Dennis Pillion |, al, 13 July 2021 About 100 of Erik's 500-plus employees are based at the Kasota Avenue facility, a former Conagra snack-production facility that now boasts locker rooms, energy-efficient lighting and a host of amenities. Star Tribune, 11 July 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'energy.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of energy

1783, in the meaning defined at sense 1a

History and Etymology for energy

Late Latin energia, from Greek energeia activity, from energos active, from en in + ergon work — more at work

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Dictionary Entries Near energy



energy balance

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Statistics for energy

Last Updated

25 Jul 2021

Cite this Entry

“Energy.” Dictionary, Merriam-Webster, Accessed 30 Jul. 2021.

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More Definitions for energy



English Language Learners Definition of energy

: ability to be active : the physical or mental strength that allows you to do things
: natural enthusiasm and effort
: usable power that comes from heat, electricity, etc.


en·​er·​gy | \ ˈe-nər-jē How to pronounce energy (audio) \
plural energies

Kids Definition of energy

1 : ability to be active : strength of body or mind to do things or to work The children … were tired and hardly had energy enough to walk.— E. B. White, Charlotte's Web
2 : strong action or effort He puts a lot of energy into his work.
3 : usable power or the resources (as oil) used to produce usable power Our new dryer uses a lot less energy.


en·​er·​gy | \ ˈen-ər-jē How to pronounce energy (audio) \
plural energies

Medical Definition of energy

2 : the capacity for doing work

More from Merriam-Webster on energy

Nglish: Translation of energy for Spanish Speakers

Britannica English: Translation of energy for Arabic Speakers


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