Energy meaning

ĕn'ər-jē
Energy is defined as the capacity for activity or the exertion of power.

An example of energy is a person being able to run five miles just after waking up.

An example of energy is what is created by a wind turbine.

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The capacity for work or vigorous activity.

Who has the energy to climb that trail?

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The impetus behind all motion and all activity.
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In physics, the capacity of a system for doing work. It took a lot of energy to write this book. (Take my word for it, so to speak.) See also physics.
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In physics, referring to a source of energy, electrical, mechanical, or otherwise.
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The capacity to do work.
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Force of expression or utterance.
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Strength or power efficiently exerted.
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The capacity for doing work.
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The capacity or power to do work, such as the capacity to move an object (of a given mass) by the application of force. Energy can exist in a variety of forms, such as electrical, mechanical, chemical, thermal, or nuclear, and can be transformed from one form to another. It is measured by the amount of work done, usually in joules or watts.
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(physics) A quantity that denotes the ability to do work and is measured in a unit dimensioned in mass × distance²/time² (ML²/T²) or the equivalent.

Units:SI: joule (J), kilowatt-hour (kW·h)CGS: erg (erg)Customary: foot-pound-force, calorie, kilocalorie (i.e. dietary calories), BTU, liter-atmosphere, ton of TNT.

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(New Age jargon) An intangible, modifiable force (often characterized as either 'positive' or 'negative') believed to emanate from a person, place or thing and which is (can be) preserved and transferred in human interactions; shared mood or group habit; a vibe, a feeling, an impression.
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Origin of energy

  • French énergie from Late Latin energīa from Greek energeia from energos active en- in, at en–2 ergon work werg- in Indo-European roots
    From American Heritage Dictionary of the English Language, 5th Edition
  • From Middle French énergie, from Late Latin energia, from Ancient Greek ἐνέργεια (energeia, “action, act, work”), from ἐνεργός (energos, “active”), from ἐν (en, “in”) + ἔργον (ergon, “work”).
    From Wiktionary