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  1. power, as measured in watts.
  2. the amount of power required to operate an electrical appliance or device.

Origin of wattage

First recorded in 1900–05; watt + -age
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for wattage


  1. power, esp electric power, measured in watts
  2. the power rating, measured in watts, of an electrical appliance
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

Word Origin and History for wattage


1903, from watt + -age.

Online Etymology Dictionary, © 2010 Douglas Harper

wattage in Science


  1. An amount of power, especially electrical power, expressed in watts or kilowatts.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.