Definition of gigawatt in English:

gigawatt

Syllabification: gig·a·watt
Pronunciation: /ˈgigəˌwät, ˈjig-
 
/

noun

(abbreviation GW)
  • A unit of electric power equal to one billion (109) watts.
    More example sentences
    • If the best existing dams were upgraded to generate electricity they could generate 17 gigawatts of power.
    • Today, present installed U.S. electrical capacity is at 600 gigawatts of power.
    • Collectively, these engines are now generating a total of about 11 gigawatts of shaft power.

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a powerful whirlpool in the sea

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