Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The capacity for work or vigorous activity; vigor; power. See Synonyms at strength.
  • n. Exertion of vigor or power: a project requiring a great deal of time and energy.
  • n. Vitality and intensity of expression: a speech delivered with energy and emotion.
  • n. Usable heat or power: Each year Americans consume a high percentage of the world's energy.
  • n. A source of usable power, such as petroleum or coal.
  • n. Physics The capacity of a physical system to do work.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The impetus behind all motion and all activity.
  • n. The capacity to do work.
  • n. 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.
  • n. 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.

from the GNU version of the Collaborative International Dictionary of English

  • n. Internal or inherent power; capacity of acting, operating, or producing an effect, whether exerted or not.
  • n. Power efficiently and forcibly exerted; vigorous or effectual operation.
  • n. Strength of expression; force of utterance; power to impress the mind and arouse the feelings; life; spirit; -- said of speech, language, words, style.
  • n. Capacity for performing work.

from The Century Dictionary and Cyclopedia

  • n. The actual exertion of power; power exerted; strength in action; vigorous operation.
  • n. Activity considered as a characteristic; habitual putting forth of power or strength, physical or mental, or readiness to exert it.
  • n. The exertion of or capacity for a particular kind of force; action or the power of acting in any manner; special ability or agency: used of the active faculties or modes of action regarded severally, and often in the plural: as, creative energy; the energies of mind and body.
  • n. In the Aristotelian philos., actuality; realization; existence; the being no longer in germ or in posse, but in life or in esse: opposed to power, potency, or potentiality.
  • n. A fact of acting or actually being.
  • n. In rhetoric, the quality of awakening the imagination of the reader or hearer, and bringing the meaning of what is said home to him; liveliness.
  • n. In physics: Half the sum of the masses of the particles of a system each multiplied by the square of its velocity; half the vis viva. See vis viva.
  • n. Half the greatest value to which the sum of the masses of all the particles of a given system each multiplied by the square of its velocity, could attain except for friction, viscosity, and other forces dependent on the velocities of the particles; otherwise, the amount of work (see work) which a given system could perform were it not for resistance dependent on the velocities.
  • n. of water in motion, or in an elevated position;
  • n. of air in motion, as the wind;
  • n. the muscular energy of animals. To these might be added the energy of direct solar radiation, the energy of the tides, and some others of less importance. The source of all these forms of energy, except that of the tides, is to be found in the radiant energy of the sun.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a healthy capacity for vigorous activity
  • n. any source of usable power
  • n. enterprising or ambitious drive
  • n. the federal department responsible for maintaining a national energy policy of the United States; created in 1977
  • n. forceful exertion
  • n. (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs
  • n. an imaginative lively style (especially style of writing)

Etymologies

French énergie, from Late Latin energīa, from Greek energeia, from energos, active : en-, in, at; see en-2 + ergon, work; see werg- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek ἐνέργεια (energeia, "action, act, work"), from ἐνεργός (energos, "active"), from ἐν (en, "in") + ἔργον (ergon, "work"). (Wiktionary)

Examples

  • Dr. Karl offers compelling counter-arguments to some of the speculations of the BPP, although he points us toward the controversial energy source of * zero point energy* as the breakthrough discovery we can use to power our starships.

    Asimov's Science Fiction

  • Rather, conventional energy strategies adopt the ‘energy trickle-down’ approach to social welfare and implicitly assume that if energy supplies are increased, these problems will take care of themselves.

    Chapter 8

  • Take, for example, the two most important terms - the energy released by the fire and the energy recovered by the pot contents (“energy utilised” in the literature).

    4.1) Market research

  • Since the energy possessed by coal only becomes available when the coal is made to undergo a chemical change, it is sometimes called _chemical energy_.

    An Elementary Study of Chemistry

  • Now when this material is reduced by the process of digestion to simpler bodies with fewer molecules, such as carbon dioxid, urea, and water, the force stored up in the meat as potential energy becomes manifest and is used as active life-force known as _kinetic energy_.

    A Practical Physiology

  • An important fact about energy is, that all energy _tends to take the form of heat energy_.

    The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told

  • It must, one would think, have been the badness of the ` ` copy '' that induced the compositors to turn ` ` the nature and theory of the Greek verb '' into _the native theology of the Greek verb_; ` ` the conser < p 124 > vation of energy '' into the _conversation of energy_; and the ` ` Forest Conservancy

    Literary Blunders

  • DeSmog uncovered information that two of the three directors on the board of the Natural Resources Stewardship Project are registered energy industry lobbyists and senior executives of the High Park Advocacy Group, a Toronto-based lobby firm that specializes in �energy, environment and ethics.

    UnderwaterTimes.com News of the Underwater World

  • It is possible that the two states are similar to the difference between potential and kinetic energy; and we must remember that _energy is always noticed or experienced by us, as energy, in its expenditure, never in its accumulation_. [

    The Problems of Psychical Research Experiments and Theories in the Realm of the Supernormal

  • In an ideal situation where you put food in, and all energy is spent cooling it and not random amounts of air, there wouldn't be a sizable difference in energy usage between a stocked and near empty freezer.

    Make Your Refrigerator Far More Efficient | Lifehacker Australia

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  • "Hundreds of thousands, if not millions, of tenant farmers who had resided in rural hamlets, living off common land, suddenly found their ancient lifestyle upended by a long wave of privatization. Those newly free-floating laborers became another, equally essential, energy source for the Industrial Revolution, filling its cities and coketowns with a nearly inexhaustible supply of cheap labor. In a sense, the Industrial Revolution would never have happened if two distinct forms of energy had not been separated from the earth: coal and commoners."
    —Steven Johnson, The Ghost Map (New York: Penguin, 2006), 94

    October 1, 2008

  • *bounces in his chair*

    September 12, 2008