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
Mach says Atlas addresses that challenge by reducing infrastructure requirements for launch and recovery while simplifying maintenance through a highly redundant propulsion architecture and a lower part count. Neetika Walter, Interesting Engineering, 18 June 2026 Benjamin Stites, a partner with Mach 7B and a 7 Brew franchisee out of Overland Park, confirmed the new location. Katelyn Umholtz, Kansas City Star, 10 June 2026 The lady inside was not very happy since the window was for her home office and she was seated at her desk when that Callaway went soaring through her window at Mach 5. Joe Kinsey Outkick, FOXNews.com, 9 June 2026 Mach, as a measurement, compares the speed of an object to the local speed of sound. Robert Pearlman, ArsTechnica, 8 June 2026 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

Browse Nearby Words

Cite this Entry

“Mach.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mach. Accessed 24 Jun. 2026.

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

Ernst 1838–1916 Austrian physicist and philosopher

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