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
That’s seven times the speed of sound, or Mach 7. Chris Young, Interesting Engineering, 1 May 2026 Meanwhile, when comparing the all-electric Mustang Mach E to the Tesla Model Y, the Mustang was 70 pounds heavier because Ford had approached the internal wiring in a more traditional way. Marco Quiroz-Gutierrez, Fortune, 24 Apr. 2026 The Hoka Mach 7 ($145) uses EVA. Power up with unlimited access to WIRED. Kieran Alger, Wired News, 23 Apr. 2026 This is not simply a new version of the Garmin D2 Mach 2, released in 2025, with extra features, though. Andrew Williams, Forbes.com, 16 Apr. 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 4 May. 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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