: a usually high speed expressed by a Mach number
an airplane flying at Mach 2
Examples of mach in a Sentence
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Andrew Williams, Forbes, 16 Jan. 2025
Commercial supersonic flight sped closer to returning as the Boom Supersonic XB-1 prototype reached a transonic speed of Mach 0.95 during Test Flight 11 on January 10, 2025, in the skies over the Mojave Desert in California.
—New Atlas, 14 Jan. 2025
The state news outlet said the hypersonic warhead flew at Mach 12—12 times the speed of sound—and struck a target 930 miles away.
—Kevin Lynn, Newsweek, 7 Jan. 2025
Ukrainian officials said the missile that struck Dnipro reached Mach 11.
—David Faris, Newsweek, 29 Dec. 2024
See all Example Sentences for mach 
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Noun
Other watches on that list include the Garmin D2 Mach 1 Pro, Epix Pro (Gen 2), Fenix 7 Pro, Quatix 7 Pro, Tactix 7 and Venu 2 Plus.
—Andrew Williams, Forbes, 16 Jan. 2025
Commercial supersonic flight sped closer to returning as the Boom Supersonic XB-1 prototype reached a transonic speed of Mach 0.95 during Test Flight 11 on January 10, 2025, in the skies over the Mojave Desert in California.
—New Atlas, 14 Jan. 2025
The state news outlet said the hypersonic warhead flew at Mach 12—12 times the speed of sound—and struck a target 930 miles away.
—Kevin Lynn, Newsweek, 7 Jan. 2025
Ukrainian officials said the missile that struck Dnipro reached Mach 11.
—David Faris, Newsweek, 29 Dec. 2024
See all Example Sentences for mach
Dictionary Entries Near mach
Cite this Entry
“Mach.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mach. Accessed 20 Jan. 2025.
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Mach
nounMedical Definition
Mach
noun
: a usually high speed expressed by a Mach number
an airplane flying at Mach 2
Biographical Definition
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