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kilowatt-hour

[kil-uh-wot-ouuh r, -ou-er]
noun
  1. a unit of energy, equivalent to the energy transferred or expended in one hour by one kilowatt of power; approximately 1.34 horsepower-hours. Abbreviation: kWh, K.W.H., kwhr
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Origin of kilowatt-hour

First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for kilowatt-hour

Historical Examples of kilowatt-hour

  • Ten 100-watt light bulbs burning for one hour would use one kilowatt-hour—one kwh.

    Electricity for the 4-H Scientist

    Eric B. Wilson

  • Buck Kendall was casting furtive glances at the kilowatt-hour meter.

    The Ultimate Weapon

    John Wood Campbell


British Dictionary definitions for kilowatt-hour

kilowatt-hour

noun
  1. a unit of energy equal to the work done by a power of 1000 watts in one hourSymbol: kWh
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

kilowatt-hour in Science

kilowatt-hour

  1. A unit used to measure energy, especially electrical energy in commercial applications. One kilowatt-hour is equal to one kilowatt of power produced or consumed over a period of one hour, or 3.6 X 106 joules.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

kilowatt-hour in Culture

kilowatt-hour

[(kil-uh-waht)]

A unit of energy: the expenditure of one kilowatt of power for one hour. A toaster running for an hour will use about this much energy.

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The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.