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
That wavelength occupies an optical channel — similar to a radio station frequency, but operating at roughly 200 terahertz rather than megahertz.
—
Tejasri Gururaj, Interesting Engineering, 30 Mar. 2026
That means scientists need to listen to frequencies well below 50 megahertz—parts of the radio spectrum that are largely blocked by Earth’s ionosphere.
—IEEE Spectrum, 20 Jan. 2026
The sale will add about 50 megahertz of mid-band and low-band spectrum to AT&T's network, with the licenses covering more than 400 markets across the U.S., AT&T said.
—Annie Palmer, CNBC, 26 Aug. 2025
However, hydrogen, which is the most abundant element in the universe, emits a characteristic radio signal at a frequency of 1,420 megahertz, corresponding to a wavelength of about 8.3 inches (21 centimeters).
—Sharmila Kuthunur, Space.com, 21 July 2025
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Tejasri Gururaj, Interesting Engineering, 30 Mar. 2026
That means scientists need to listen to frequencies well below 50 megahertz—parts of the radio spectrum that are largely blocked by Earth’s ionosphere.
—IEEE Spectrum, 20 Jan. 2026
The sale will add about 50 megahertz of mid-band and low-band spectrum to AT&T's network, with the licenses covering more than 400 markets across the U.S., AT&T said.
—Annie Palmer, CNBC, 26 Aug. 2025
However, hydrogen, which is the most abundant element in the universe, emits a characteristic radio signal at a frequency of 1,420 megahertz, corresponding to a wavelength of about 8.3 inches (21 centimeters).
—Sharmila Kuthunur, Space.com, 21 July 2025
See All Example Sentences for megahertz
Cite this Entry
“Megahertz.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/megahertz. Accessed 12 Apr. 2026.
Copy CitationKids 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
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