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: a usually high speed expressed by a Mach number
an airplane flying at Mach 2
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Noun
The Overture is a much larger, more complicated commercial aircraft, designed to fly at Mach 1.7 and carry 64 to 80 passengers.
—Michael Verdon, Robb Report, 29 Jan. 2025
The sound barrier is the sudden increase in aerodynamic drag that occurs when an object approaches Mach 1.
—Jonathan Granoff, Newsweek, 29 Jan. 2025
The commercial Overture airliners will be able to carry 64 to 80 passengers at Mach 1.7, about twice the speed of today’s subsonic airliners, meaning a flight could cross the Atlantic in just about 3 1/2 hours.
—Mary Walrath-Holdridge, USA TODAY, 29 Jan. 2025
Boom’s plan is that Overture will be in operation before the end of the decade, carrying 64 to 80 passengers at Mach 1.7, about twice the speed of today’s subsonic airliners.
—Cnn.com Wire Service, The Mercury News, 28 Jan. 2025
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Word History
Etymology
Noun
Mach number
Phrases Containing mach
Dictionary Entries Near mach
Cite this Entry
“Mach.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mach. Accessed 2 Feb. 2025.
Kids Definition
Mach
nounMedical Definition
Mach
noun
: a usually high speed expressed by a Mach number
an airplane flying at Mach 2
Biographical Definition
More from Merriam-Webster on mach
Nglish: Translation of mach for Spanish Speakers
Britannica English: Translation of mach for Arabic Speakers
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