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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Kil·o·watt hour. Elec. A unit of work or energy equal to that done by one kilowatt acting for one hour; -- approximately equal to 1.34 horse-power hour.
 

From: WordNet (r) 2.0

 kilowatt hour
      n : a unit of energy equal to the work done by a power of 1000
          watts operating for one hour [syn: kW-hr, Board of
          Trade unit, B.T.U.]