ki·​lo·​hertz | \ˈki-lə-ˌhərts, ˈkē-lə-, -ˌherts\
plural kilohertz

Definition of kilohertz 

: 1000 hertz

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Did You Know?

If your favorite AM radio station has a frequency of 680 kilohertz (kHz), that means the station's transmitter is oscillating (vibrating) at a rate of 680,000 cycles per second (i.e., 680,000 times a second). A related term is megahertz (MHz), meaning "millions of cycles per second". Shortwave radio operates between 5.9 and 26.1 MHz, and the FM radio band operates between 88 and 108 MHz. Garage-door openers work at about 40 MHz, baby monitors work at 49 MHz, and so on. The terms hertz, kilohertz and megahertz honor the great German physicist Heinrich Hertz, the first person to broadcast and receive radio waves.

Examples of kilohertz in a Sentence

a frequency of 80 kilohertz

Recent Examples on the Web

The transmitter and receiver are matched to the same magnetic frequency, about 85 kilohertz, so that energy losses are minimal and the system operates at 95 percent efficiency, Daga said, comparable to a plug-in charger. Andrew Maykuth,, "Malvern start-up imagines a world where electric vehicles are recharged wirelessly," 26 Apr. 2018 Peak hearing sensitivity for most birds is believed to rest between two to three kilohertz. Douglas Quenqua, New York Times, "This Hummingbird Chirps Like an Insect. Can It Hear Its Own Sound?," 5 Mar. 2018 RFIDs are typically found in three frequency families: low-frequency (125 and 134 kilohertz), high-frequency (13.56 megahertz), and UHF (800-915 megahertz). Yael Grauer, Ars Technica, "A practical guide to microchip implants," 3 Jan. 2018 Some hear high-pitch frequencies up to 100 kilohertz (kHz), which is about 80 kHz higher than the upper limit of human hearing. Kimberly Hickok, Science | AAAS, "Whales and dolphins can naturally muffle loud sounds, potentially protecting them from sonar and other dangers," 11 Dec. 2017 The JANUS protocol establishes a single frequency—11.5 kilohertz—that is reserved for initial communication between two systems, as well as frequencies for announcing a system's presence to everyone nearby. Avery Thompson, Popular Mechanics, "Robots Finally Have a Good Way to Communicate Underwater," 10 July 2017 So sending a 2,000 kilohertz signal from one direction, and a 2,001 kHz signal from another will result in a 1 Hz signal, Boyden said. Maggie Fox, NBC News, "Scientists Try Deep Brain Stimulation Without Surgery," 2 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'kilohertz.' 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 kilohertz

1929, in the meaning defined above

History and Etymology for kilohertz

International Scientific Vocabulary

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Time Traveler for kilohertz

The first known use of kilohertz was in 1929

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English Language Learners Definition of kilohertz

: a unit of frequency equal to 1,000 hertz


ki·​lo·​hertz | \ˈkil-ə-ˌhərts, ˈkē-lə-, -ˌhe(ə)rts\

Medical Definition of kilohertz 

: 1000 hertz

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