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Definition of energy:

  1. Capacity for performing work.
  2. 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.
  3. Power efficiently and forcibly exerted; vigorous or effectual operation; as, the energy of a magistrate.
  4. 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.


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