Definition of "watt" []

• Electricity An International System unit of power equal to one joule per second. See Table at measurement. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "(Lumens per watt is similar to miles per gallon - the higher the number represents greater efficiency)"
• "The cost per watt is an estimate of one study likely using only two current examples from industry."
• "Lumens-per-watt is the standard used by the lighting industry to measure the conversion of electrical energy to light."