Dictionary.com

kilowatt-hour

[ kil-uh-wot-ouuhr, -ou-er ]
/ ˈkɪl əˌwɒtˈaʊər, -ˈaʊ ər /
Save This Word!

noun
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

COMPARE MEANINGS

Click for a side-by-side comparison of meanings. Use the word comparison feature to learn the differences between similar and commonly confused words.
QUIZ
WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?
Smoothly step over to these common grammar mistakes that trip many people up. Good luck!
Question 1 of 7
Fill in the blank: I can’t figure out _____ gave me this gift.

Origin of kilowatt-hour

First recorded in 1890–95

Words nearby kilowatt-hour

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use kilowatt-hour in a sentence

British Dictionary definitions for kilowatt-hour

kilowatt-hour

noun
a unit of energy equal to the work done by a power of 1000 watts in one hourSymbol: kWh
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

Scientific definitions for kilowatt-hour

kilowatt-hour

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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Cultural definitions for kilowatt-hour

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.

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.
FEEDBACK