/ Dictionary / Index G gigawatt: Meaning and Definition of Find definitions for: gi•ga•watt Pronunciation: (gig'u-wot", jig'-), [key] — n. one billion watts. Abbr.: GW, Gw Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gigaton giggle Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language