: 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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Natasha Lindstaedt, Forbes.com, 14 July 2025
The company has also positioned its W-series of spacecraft, which reenter at a maximum speed of Mach 25, as an ideal test bed for thermal protection materials, navigation, communications, and other sensors that could be flown operationally on hypersonic missiles.
—ArsTechnica, 10 July 2025
Hypersonic weapons are expensive and difficult-to-produce systems able to travel at Mach 5—i.e., upwards of five times the speed of sound.
—Ellie Cook, MSNBC Newsweek, 7 July 2025
The rest of the region is moving at Mach speed and you will be left behind.
—Caitlin McFall, FOXNews.com, 7 July 2025
See All Example Sentences for mach
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Noun
The Russians initially boasted that the Kinzhal was impossible to intercept due to its reported speed of up to 7,700 miles per hour (or Mach 10), but Patriot systems in Ukraine have repeatedly proven effective even on hypersonic missiles —going beyond what the Patriot was designed to do.
—Natasha Lindstaedt, Forbes.com, 14 July 2025
The company has also positioned its W-series of spacecraft, which reenter at a maximum speed of Mach 25, as an ideal test bed for thermal protection materials, navigation, communications, and other sensors that could be flown operationally on hypersonic missiles.
—ArsTechnica, 10 July 2025
Hypersonic weapons are expensive and difficult-to-produce systems able to travel at Mach 5—i.e., upwards of five times the speed of sound.
—Ellie Cook, MSNBC Newsweek, 7 July 2025
The rest of the region is moving at Mach speed and you will be left behind.
—Caitlin McFall, FOXNews.com, 7 July 2025
See All Example Sentences for mach
Cite this Entry
“Mach.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mach. Accessed 19 Jul. 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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