Definition of watt
: the absolute meter-kilogram-second unit of power equal to the work done at the rate of one joule per second or to the power produced by a current of one ampere across a potential difference of one volt : 1⁄746 horsepower
Recent Examples of watt from the Web
Here are the turbine specifications: Blade diameter: 28.5 feet Shroud diameter: 37.5 feet Nameplate generating capability of 25 kilowatts (25,000 watts) Mounting pole height:
This UPS is an 1325 VA / 810 watt unit with pure sine wave output.
The worst thing to do is rush out and replace equipment just to save a few watts.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'watt'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of watt
James Watt †1819
First Known Use: 1882
Definition of Watt
James 1736–1819 Scottish inventor
WATT Defined for English Language Learners
Definition of watt for English Language Learners
: a unit for measuring electrical power
WATT Defined for Kids
Definition of watt for Students
: a unit for measuring electric power
Medical Definition of watt
: the absolute mks unit of power equal to the work done at the rate of one joule per second or to the power produced by a current of one ampere across a potential difference of one volt : 1⁄746 horsepower
Biographical Note for watt
James (1736–1819), British engineer and inventor. Watt's steam engine played a major role in the coming of the Industrial Revolution and came to be used in paper mills, flour mills, cotton mills, iron mills, distilleries, canals, and waterworks. At the end of the 19th century the International Electrical Congress named the watt, the unit of electrical power, in his honor.
Seen and Heard
What made you want to look up watt? Please tell us where you read or heard it (including the quote, if possible).