watt-hour

noun
\ˈwät-ˈau̇(-ə)r \

Definition of watt-hour 

: a unit of work or energy equivalent to the power of one watt operating for one hour

First Known Use of watt-hour

1888, in the meaning defined above

Keep scrolling for more

Learn More about watt-hour

Statistics for watt-hour

Look-up Popularity

Time Traveler for watt-hour

The first known use of watt-hour was in 1888

See more words from the same year

Comments on watt-hour

What made you want to look up watt-hour? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a state of commotion or excitement

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!