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The definition of energy

5 Definitions of: energy

    1. noun, intensity or vitality of action or expression; forcefulness
    2. noun, capacity or tendency for intense activity; vigour
    3. noun, vigorous or intense action; exertion
    4. noun, physics a) the capacity of a body or system to do work b) a measure of this capacity, expressed as the work that it does in changing to some specified reference state. It is measured in joules (SI units). Symbol: E
    5. noun, a source of power. See also kinetic energy, potential energy
    6. Show me some examples of this word: energy
    7. Show me the etymology of the word: energy
Synonyms: power, strength, life, force, determination, vitality, zest, animation, might, activity And more...
 

From Collins

©HarperCollins 2008. Collins English Dictionary definition of energy