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Definition of megahertz

megahertz

/ˈmɛɡ.əˌhɜːrts/
meg · a · hertz
Plural:megahertz
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megahertz Lexical Profile

megahertz Game Scores & Validity

• noun

1

A unit of frequency equal to one million hertz (1,000,000 cycles per second), commonly used to measure electromagnetic wave frequencies, radio broadcasts, and computer processor clock speeds.

Example

"The local FM radio station broadcasts its signal at a frequency of 98.5 megahertz."

Word Nuance & Usage

The plural form is most commonly invariant ('megahertz'), especially after numerals, though 'megahertzes' is occasionally seen. Its standard symbol is MHz (with a capital 'M' to distinguish it from millihertz, mHz).

• Nearby Words

megadrought
megadune
megafire
megahertz
megahit
megaliter
megalithic

Word Origin & Etymology

Coined in the early 20th century from the metric prefix 'mega-' (from Ancient Greek 'megas', meaning 'great' and denoting a factor of one million) and 'hertz', the unit of frequency named after the German physicist Heinrich Rudolf Hertz (1857–1894).

Cite this Entry

Wordmom. (2026). Definition of Megahertz. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/megahertz
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