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 device keeps its light extremely stable, with frequency variation below 30 kilohertz, while rapidly changing its frequency over 900 megahertz as many as 1 million times per second. — Muskan Bhatia, Interesting Engineering, 30 Oct. 2026

Earlier this month, SpaceX agreed to buy investment firm Grain Management’s 800-megahertz-band licenses to boost its Starlink Mobile phone service indoors. — Amanda Gerut, Fortune, 20 Oct. 2026

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

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

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