/ Dictionary / Index H hertz: Meaning and Definition of Find definitions for: hertz Pronunciation: (hûrts), [key] — pl. hertz, hertz•es. the SI unit of frequency, equal to one cycle per second. Abbr.: Hz Hertz Pronunciation: (hûrts, hârts Ger. herts), [key] — n. 1887–1975, German physicist: Nobel prize 1925. 1857–94, German physicist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hertz (Thesaurus) Hertogenbosch, 's Hertz effect Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language