\ ˈhərts How to pronounce hertz (audio) , ˈherts How to pronounce hertz (audio) \
plural hertz

Definition of hertz

 (Entry 1 of 3)

: a unit of frequency equal to one cycle per second abbreviation Hz


biographical name (1)
\ ˈherts How to pronounce Hertz (audio) , ˈhərts \

Definition of Hertz (Entry 2 of 3)

Gustav Ludwig 1887–1975 German physicist


biographical name (2)

Definition of Hertz (Entry 3 of 3)

Heinrich Rudolf 1857–1894 German physicist

Examples of hertz in a Sentence

Recent Examples on the Web: Noun The 5 hertz flashes can only be activated when the vehicle is motionless. Mark Phelan, Detroit Free Press, "Your car's emergency flashers could get a major upgrade soon — and here's why," 6 Dec. 2020 It’s based on a timeless handheld design that’s comfortable to hold and resistant to environmental noise thanks to its internal pop filter and cardioid pattern, with a frequency response of 50 hertz to 16 kilohertz. Popular Science, "The best vocal microphones for home recording," 23 Nov. 2020 Lower sounds, with frequencies below 500 hertz, could only be cancelled out by larger speakers, which ruins the system’s goal of allowing an open window for fresh air. Theresa Machemer, Smithsonian Magazine, "Window-Mounted Device Could Keep Out City Noise," 14 July 2020 Several excesses seem to cluster around a value of 10 hertz per kilogram of detector mass. Daniel Garisto, Scientific American, "Direct Proof of Dark Matter May Lurk at Low-Energy Frontiers," 9 June 2020 Alpha waves, for example, oscillate at frequencies of 8 to 12 hertz. Quanta Magazine, "Spreading the Word on a Possible Alzheimer’s Treatment," 27 May 2020 Humans can’t hear sound below 20 hertz, but some people subconsciously respond to lower frequencies with feelings of fear or dread, reports Jennifer Ouellette for Gizmodo. Andrea Michelson, Smithsonian, "Five Scientific Explanations for Spooky Sensations," 30 Oct. 2019 On a monitor, hertz (Hz) refers to how many times per second the display refreshes itself. Popular Mechanics Editors, Popular Mechanics, "CES Editors’ Choice Awards: The Most Exciting Tech for 2020," 9 Jan. 2020 This sound is likely infrasound, a category of sounds lower than 20 hertz that are inaudible to humans. Kyle Mizokami, Popular Mechanics, "So What Is This Secretive Chinese Sonic Weapon Exactly?," 25 Sep. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hertz.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of hertz


circa 1928, in the meaning defined above

History and Etymology for hertz


Heinrich R. Hertz

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Time Traveler for hertz

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The first known use of hertz was circa 1928

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Cite this Entry

“Hertz.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hertz. Accessed 2 Mar. 2021.

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More Definitions for hertz



English Language Learners Definition of hertz

technical : a unit used for measuring the frequency of sound waves


\ ˈhərts How to pronounce hertz (audio) , ˈherts How to pronounce hertz (audio) \

Medical Definition of hertz

: a unit of frequency equal to one cycle per second abbreviation Hz

More from Merriam-Webster on hertz

Nglish: Translation of hertz for Spanish Speakers

Britannica.com: Encyclopedia article about hertz

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