: 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
Sheryl Estrada, Fortune, 20 Aug. 2025
The European Space Agency (ESA) recently jumped into the burgeoning space-plane sector, announcing funding for a new research program called Invictus, which will develop a hypersonic space plane capable of Mach 5 (3,386 mph).
—Michael Verdon, Robb Report, 20 Aug. 2025
The Soviet Union's Tu-144 design, meanwhile, depended heavily on loud afterburners for the aircraft to reach Mach 1 (767 mph, or 1,235 km/h) — or faster than the speed of sound.
—Lisa D. Sparks, Space.com, 9 Aug. 2025
The final numbers include a max speed of Mach 0.94 (721 mph), an ultrahigh speed of Mach 0.92 (706 mph), and a standard cruise of Mach 0.85 (652 mph)—the latter delivering its benchmark range.
—Michael Verdon, Robb Report, 26 July 2025
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Noun
Gary Hobart was appointed CFO of Mach Industries, a defense manufacturing provider.
—Sheryl Estrada, Fortune, 20 Aug. 2025
The European Space Agency (ESA) recently jumped into the burgeoning space-plane sector, announcing funding for a new research program called Invictus, which will develop a hypersonic space plane capable of Mach 5 (3,386 mph).
—Michael Verdon, Robb Report, 20 Aug. 2025
The Soviet Union's Tu-144 design, meanwhile, depended heavily on loud afterburners for the aircraft to reach Mach 1 (767 mph, or 1,235 km/h) — or faster than the speed of sound.
—Lisa D. Sparks, Space.com, 9 Aug. 2025
The final numbers include a max speed of Mach 0.94 (721 mph), an ultrahigh speed of Mach 0.92 (706 mph), and a standard cruise of Mach 0.85 (652 mph)—the latter delivering its benchmark range.
—Michael Verdon, Robb Report, 26 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 24 Aug. 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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