mach

1 of 2

abbreviation

Mach

2 of 2

noun

: 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
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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 See all Example Sentences for mach 

Word History

Etymology

Noun

Mach number

First Known Use

Noun

1947, in the meaning defined above

Time Traveler
The first known use of mach was in 1947

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

noun

Medical Definition

Mach

noun
: a usually high speed expressed by a Mach number
an airplane flying at Mach 2

Biographical Definition

Mach

biographical name

ˈmäḵ How to pronounce Mach (audio)
ˈmäk
Ernst 1838–1916 Austrian physicist and philosopher

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