[gig-uh-wot, jig-]
one billion watts. Abbreviation: GW, Gw

1960–65; giga- + watt Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
We're not too far away from supercomputers that could use half a gigawatt-as much energy as a small city.
Some power plants may report power production in kilowatt- or megawatt-hours that will have to be converted to gigawatt-hours.
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