Dictionary > English Dictionary > Definition, synonym and antonym of energy
Meaning of energy by Wiktionary Dictionary



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


    • IPA: /ˈɛnɚʤi/, X-SAMPA: /"En@`dZi/


    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 the equivalent .
      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
    4. ( 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 ( or can be ) preserved and transferred in human interactions; shared mood or group habit; a vibe, a feeling, an impression.

    Derived terms

    Related terms

    External links

    • energy in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
    • energy in The Century Dictionary, The Century Co., New York, 1911


Explanation of energy by Wordnet Dictionary


    1. an imaginative lively style ( especially style of writing )

    2. his writing conveys great energy
    3. enterprising or ambitious drive

    4. Europeans often laugh at American energy
    5. forceful exertion

    6. he plays tennis with great energy
    7. the federal department responsible for maintaining a national energy policy of the United States

    8. any source of usable power

    9. the DOE is responsible for maintaining the energy policy
    10. a thermodynamic quantity equivalent to the capacity of a physical system to do work

    11. energy can take a wide variety of forms
    12. a healthy capacity for vigorous activity

    13. jogging works off my excess energy

    Definition of energy by GCIDE Dictionary


    1. Energy n.; pl. Energies [F. énergie, LL. energia, fr. Gr., fr. active; in + work. See In, and Work.]
      1. Internal or inherent power; capacity of acting, operating, or producing an effect, whether exerted or not; as, “men possessing energies may suffer them to lie inactive”.

      The great energies of nature are known to us only by their effects. Paley.

      2. Power efficiently and forcibly exerted; vigorous or effectual operation; as, “the energy of a magistrate”.

      3. Strength of expression; force of utterance; power to impress the mind and arouse the feelings; life; spirit; -- said of speech, language, words, style; as, “a style full of energy”.

      4. ( Physics ) Capacity for performing work.

      ☞ The kinetic energy of a body is the energy it has in virtue of being in motion. It is measured by one half of the product of the mass of each element of the body multiplied by the square of the velocity of the element, relative to some given body or point. The available kinetic energy of a material system unconnected with any other system is that energy which is due to the motions of the parts of the system relative to its center of mass. The potential energy of a body or system is that energy which is not kinetic; -- energy due to configuration. Kinetic energy is sometimes called actual energy. Kinetic energy is exemplified in the vis viva of moving bodies, in heat, electric currents, etc.; potential energy, in a bent spring, or a body suspended a given distance above the earth and acted on by gravity.

      Accumulation, Conservation, Correlation, and Degradation of energy, etc. ( Physics ) See under Accumulation, Conservation, Correlation, etc.

      Syn. -- Force; power; potency; vigor; strength; spirit; efficiency; resolution.