/ Dictionary / Index G gigahertz: Meaning and Definition of Find definitions for: gi•ga•hertz Pronunciation: (gig'u-hûrts", jig'-), [key] — pl. -hertz, -hertz•es. one billion hertz. Abbr.: GHz Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gigahertz (Thesaurus) gigaflops gigantean Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language