kilowatt-hour

noun

kilo·​watt-hour ˈki-lə-ˌwät-ˈau̇(-ə)r How to pronounce kilowatt-hour (audio)
ˈkē-lə-
: a unit of work or energy equal to that expended by one kilowatt in one hour or to 3.6 million joules

Examples of kilowatt-hour in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
What To Know The U.S. currently generates about 3.9 trillion kilowatt-hours of electricity annually. Theo Burman, MSNBC Newsweek, 26 May 2025 The electricity charge for ComEd customers from June through September is expected to be 10 cents per kilowatt-hour — up 45% from last summer, according to CUB. Robert Channick, Chicago Tribune, 19 May 2025 But of course, there are a million patentable ways to turn a photon into a kilowatt-hour (for example). Rob Day, Forbes.com, 16 May 2025 Electricity In April, the average price of electricity nationwide was 18 cents per kilowatt-hour. Claire Malon, Chicago Tribune, 15 May 2025 See All Example Sentences for kilowatt-hour

Word History

First Known Use

1892, in the meaning defined above

Time Traveler
The first known use of kilowatt-hour was in 1892

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Cite this Entry

“Kilowatt-hour.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/kilowatt-hour. Accessed 4 Jun. 2025.

Kids Definition

kilowatt-hour

noun
: a unit of work or energy equal to that expended by one kilowatt in one hour and equal to 3.6 million joules

Medical Definition

kilowatt-hour

noun
: a unit of work or energy equal to that expended by one kilowatt in one hour
Last Updated: - Updated example sentences
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