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Noun energy has 6 senses
  1. energy - (physics) the capacity of a physical system to do work; the units of energy are joules or ergs; "energy can take a wide variety of forms"
    --1 is a kind of     physical phenomenon
    --1 has particulars:
     activation energy, energy of activation; alternative energy; atomic energy, nuclear energy; binding energy, separation energy; chemical energy; electricity, electrical energy; energy level, energy state; rest energy; work; heat, heat energy; mechanical energy; radiant energy; radiation
    Derived forms: verb energize2, verb energize1
  2. energy, vigor, vigour - an exertion of force; "he plays tennis with great energy"
    --2 is a kind of force, forcefulness, strength
    --2 has particulars: athleticism, strenuosity
    Derived forms: verb energize2, verb energize1
  3. energy, push, get-up-and-go - enterprising or ambitious drive; "Europeans often laugh at American energy"
    --3 is a kind of drive
    --3 has particulars: second wind
    Derived form: verb energize1
  4. energy, vigor, vigour, vim - an imaginative lively style (especially style of writing); "his writing conveys great energy"
    --4 is a kind of liveliness, life, spirit, sprightliness
    --4 has particulars: vitality, verve
    Derived form: verb energize2
  5. energy, vim, vitality - a healthy capacity for vigorous activity; "jogging works off my excess energy"; "he seemed full of vim and vigor"
    --5 is a kind of good health, healthiness
    --5 has particulars: juice; qi, chi, ch'i, ki
    Derived forms: verb energize2, verb energize1
  6. Department of Energy, Energy Department, Energy, DOE - the federal department responsible for maintaining a national energy policy of the United States; created in 1977
    --6 is a kind of executive department
    --6 has parts: Department of Energy Intelligence, DOEI
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