megahertz

noun

mega·​hertz ˈme-gə-ˌhərts 

-ˌherts

plural megahertz

: a unit of frequency equal to one million hertz

—abbreviation MHz

Examples of megahertz in a Sentence

Recent Examples on the Web

The set operates in the high-frequency (HF) band from 3 to 30 megahertz, as does Mercury, its digital modem. — Margo Anderson, IEEE Spectrum, 21 Sep. 2026

Crsbr opens design options The researchers measured conversion across a microwave bandwidth of roughly 300 megahertz. — Aamir Khollam, Interesting Engineering, 18 Sep. 2026

That began to change last year when SpaceX agreed to acquire Echostar’s 65 megahertz of spectrum for $17 billion to help propel Starlink Mobile. — Morgan Brennan,harriet Taylor, CNBC, 12 June 2026

In the '90s and early 2000s, there was a similar race to increase computer clock speed (megahertz to gigahertz). — Charles Pensig, Forbes.com, 14 May 2026

Word History

Etymology

mega- + hertz

First Known Use

1941, in the meaning defined above

Kids Definition

megahertz

noun

mega·​hertz ˈmeg-ə-ˌhərts 

-ˌhe(ə)rts

: a unit of frequency equal to one million hertz

Medical Definition

megahertz

noun

mega·​hertz ˈmeg-ə-ˌhərts 

: one million hertz

—abbreviation MHz