Webster's English Dictionary

Enter the word to look up:

watt

watt \'wa:t\ n [James Watt -1819 Sc engineer] : the absolute mks unit of 
   power to the work done at the rate of one absol ute joule per second or to 
   the rate of work represented by a current of one ampere under a pressure of 
   one volt and taken as the standard in the U.S. : 1/746 horsepower