energy


   

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energy

Definition from Wiktionary, a free dictionary

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Contents

[ English

[ Etymology

From Ancient Greek ἐνέργεια (energeia) "action, act, work", < ἐνεργός (energos) "active" < ἐν (en) "in" + ἔργον (ergon) "work".

[ Noun

Singular
energy

Plural
energies

energy (plural energies)

  1. The impetus behind all motion and all activity.
  2. The capacity to do work.
  3. (physics) A quantity that denotes the ability to do work and is measured in a unit dimensioned in mass × distance²/time² (ML²/T²) or thee 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

[ Translations

impetus behind activity
capacity to do work
physics

[ Derived terms

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