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

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.
Recent Examples on the Web Oil and gas companies alone can’t solve this problem since alternative sources of energy must be found. Robert G. Eccles, Forbes, 4 Aug. 2022 Still, there is one major drawback: These facilities consume a lot of energy. Sarah Bowman, The Indianapolis Star, 3 Aug. 2022 This is like a particular Chicago sort of a manifestation of that energy. Leah Greenblatt,, 3 Aug. 2022 Near-constant blooming uses up lots of energy, so petunias need to be planted in rich, nutrient-dense soil with plenty of organic matter. Andrea Beck, Better Homes & Gardens, 2 Aug. 2022 In ultrasound for skin treatments, an ultrasound device is applied over a target area with a concentrated beam of energy to create heat in the dermis[ to stimulate collagen production. Alfredo Mineo, Allure, 2 Aug. 2022 That makes the heart pump faster, moving blood to muscles; breathing quickens, sending extra oxygen to the brain; and a glucose surge gives the body a burst of energy. Andrea Petersen, WSJ, 2 Aug. 2022 The cost of energy has soared for Spanish businesses and households in recent months since the Russian invasion of Ukraine. Rachel Paik, Fox News, 29 July 2022 This box is full of seven dog products to keep your canine happy and full of energy. Mariah Thomas, Good Housekeeping, 27 July 2022 See More

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.

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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Last Updated

6 Aug 2022

Cite this Entry

“Energy.” Dictionary, Merriam-Webster, Accessed 15 Aug. 2022.

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More Definitions for energy


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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