: a usually high speed expressed by a Mach number
an airplane flying at Mach 2
Examples of mach in a Sentence
Recent Examples on the Web
Deni Ellis Béchard, Scientific American, 18 June 2025
Currently, there are several supersonic passenger jets in development that aim to reach speeds beyond Mach 1 without crashing loudly through the sound barrier.
—Edward Russell, CNN Money, 5 June 2025
The existing noise rules have been in place since 1968, and a corresponding FAA restriction on flights exceeding Mach 1 established in 1970.
—Marisa Garcia, Forbes.com, 9 June 2025
One of Trump's orders directs the FAA to eliminate the 1973 speed restriction that prohibits flights over Mach 1 and replace it with a noise standard.
—Josh Funk, Arkansas Online, 8 June 2025
See All Example Sentences for mach
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Noun
While the exact impact velocity is classified, it is estimated to exceed Mach 1—the speed of sound (767 mph).
—Deni Ellis Béchard, Scientific American, 18 June 2025
Currently, there are several supersonic passenger jets in development that aim to reach speeds beyond Mach 1 without crashing loudly through the sound barrier.
—Edward Russell, CNN Money, 5 June 2025
The existing noise rules have been in place since 1968, and a corresponding FAA restriction on flights exceeding Mach 1 established in 1970.
—Marisa Garcia, Forbes.com, 9 June 2025
One of Trump's orders directs the FAA to eliminate the 1973 speed restriction that prohibits flights over Mach 1 and replace it with a noise standard.
—Josh Funk, Arkansas Online, 8 June 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 28 Jun. 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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