• synonyms


noun, plural kil·o·hertz, kil·o·hertz·es. Physics.
  1. a unit of frequency, equal to 1000 cycles per second. Abbreviation: kHz
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Compare kilocycle.

Origin of kilohertz

First recorded in 1925–30; kilo- + hertz
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for kilohertz


  1. one thousand hertz; one thousand cycles per secondSymbol: kHz
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

kilohertz in Science


  1. A unit of frequency equal to 1,000 cycles per second (1,000 hertz). It is used in the measurement of radio, sound, and other waves.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.