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1. Dictionary

   energy

   /ˈɛnədʒi/

   noun

   • 1. the strength and vitality required for sustained physical or mental activity: "changes in the levels of vitamins can affect energy and well-being" Similar vitalityvigourlifelivelinessanimationvivacityspiritspiritednessfirepassionardourzealverveenthusiasmzestvibrancysparksparkleeffervescenceexuberancebuoyancyperkinesssprightlinessstrengthstaminaforcefulnesspowermightpotencydynamismdrivepushinformal:zipzingpeppizzazzpunchbouncefizzoomphgoget-up-and-govim and vigourfeistiness
   • ▪ a person's physical and mental powers: "an alternative is to devote your energies to voluntary work"
   • 2. power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines: "nuclear energy" Similar power
   • 3. the property of matter and radiation which is manifest as a capacity to perform work (such as causing motion or the interaction of molecules): "a collision in which no energy is transferred"
   • ▪ a degree or level of energy possessed by something or required by a process: "gamma rays at different energies"

   Word Origin mid 16th century (denoting force or vigour of expression): from French énergie, or via late Latin from Greek energeia, from en- ‘in, within’ + ergon ‘work’.

   Scrabble Points: 10

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   More definitions, origin and scrabble points

2. www.britannica.com › science › energyEnergy | Definition, Types, Examples, & Facts | Britannica

   www.britannica.com › science › energy

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   Jun 19, 2024 · Energy is the capacity for doing work in various forms, such as potential, kinetic, thermal, electrical, chemical, or nuclear. Learn how energy can be converted, measured, and conserved from Britannica's articles and videos.

   • Nuclear

     Nuclear fusion is the process by which nuclear reactions...

   • Students

     Heat energy, or thermal energy, is the energy something has...

   • Geothermal Energy

     Worldwide, the annual low-grade heat flow to the surface of...

   • Thermal

     A flowing fluid or a moving solid, for example, possesses...

   • Principles of Physical Science

     principles of physical science, the procedures and concepts...

   • Oil Shale

     oil shale, any sedimentary rock containing various amounts...

   • Conservation of Energy

     conservation of energy, principle of physics according to...

   • Potential Energy

     potential energy, stored energy that depends upon the...

3. en.wikipedia.org › wiki › EnergyEnergy - Wikipedia

   en.wikipedia.org › wiki › Energy

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   Energy is a conserved quantity —the law of conservation of energy states that energy can be converted in form, but not created or destroyed; matter and energy may also be converted to one another. The unit of measurement for energy in the International System of Units (SI) is the joule (J).

4. Videos

   • 

     3:39

     youtube.com

     What is energy? | Introduction to energy | High school physics | Khan Academy

     12 Jul 2021

     69.6K views

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     3:09

     youtube.com

     What is Energy?

     4 Mar 2022

     101.9K views

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     4:11

     youtube.com

     Energy and Different Forms of Energy with Examples

     19 Feb 2019

     439.5K views

   View all

5. sciencenotes.org › energy-definition-examplesWhat Is Energy? Energy Definition and Examples (Science)

   sciencenotes.org › energy-definition-examples

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   Nov 27, 2017 · Learn what energy is in science, how it is conserved and classified, and what are some common forms of energy. See examples of energy in everyday life and how it can be renewable or non-renewable.

6. www.merriam-webster.com › dictionary › energyEnergy Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › energy

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   Learn the various meanings and uses of the word energy, from dynamic quality to usable power. See synonyms, examples, word history, and related phrases of energy.

7. www.eia.gov › energyexplained › what-is-energyWhat is energy? explained - U.S. Energy Information...

   www.eia.gov › energyexplained › what-is-energy

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   Scientists define energy as the ability to do work. Modern civilization is possible because people have learned how to change energy from one form to another and then use it to do work.

8. www.khanacademy.org › v › what-is-energyWhat is energy? (video) | Khan Academy

   www.khanacademy.org › v › what-is-energy

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   Learn the definition of energy as the ability to do work, and how it can be transferred and converted between different forms. Watch a video and read a transcript with examples, equations, and questions.

   • Video Duration: 4 min

   • Author: Khan Academy

9. dictionary.cambridge.org › us › dictionaryENERGY | definition in the Cambridge English Dictionary

   dictionary.cambridge.org › us › dictionary

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   ENERGY meaning: 1. the power and ability to be physically and mentally active: 2. the total of all your power and…. Learn more.