energy

noun

en·er·gy | \ ˈe-nər-jē

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 Choose the Right Synonym More Example Sentences Learn More about 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

Since then, she's focused all of her energy on putting them first, leaving little time for self-care. — Stacia Affelt, Good Housekeeping, "You Won't Believe This Mom's Incredible Head-to-Toe Makeover," 9 Apr. 2019 And so Apple is redirecting its energies—and the extremely valuable resource of Apple Event Stage Time—in a direction with promising potential for profit, and more importantly the growth of profit. — Eric Limer, Popular Mechanics, "For Apple's Big Event on Monday, Hardware Is Just a Sideshow," 21 Mar. 2019 Your energy is better spent on the solutions for the problem. — Caitlin Moscatello, Woman's Day, "10 Things You Should Never Do After a Fight With Your Partner," 20 Feb. 2019 His quanta effectively capped the amount of energy that heated objects could release at any temperature. — Tim Folger, Discover Magazine, "How Quantum Mechanics Lets Us See, Smell and Touch," 24 Oct. 2018 And the banter between him and Kate—his and Kate's energy is really funny. — Katherine J. Igoe, Marie Claire, "Kate Middleton Jokes About Prince William's Hair All the Time," 15 Mar. 2019 This system would enhance the competitiveness of American firms that are more energy-efficient than their global competitors. — WSJ, "Economists’ Statement on Carbon Dividends," 16 Jan. 2019 Nearly two decades after the end of the war, the energy is different, but still largely driven by the underground. — Sarah Souli, Condé Nast Traveler, "Kosovo Is an All-Night Party—And Shows No Signs of Slowing Down," 26 Oct. 2018 Almased optimizes the metabolism, helps with weight loss, and improves energy over the whole day. — Woman's Day, "It’s Possible – Boost Your Metabolism!," 12 Mar. 2019

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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Last Updated

18 Apr 2019

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Time Traveler for energy

The first known use of energy was in 1783

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More Definitions for energy

energy

noun

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.

See the full definition for energy in the English Language Learners Dictionary

energy

noun

en·er·gy | \ ˈe-nər-jē

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.