mach

1 of 2

abbreviation

machine; machinery; machinist

Mach

2 of 2

noun

ˈmäk How to pronounce Mach (audio)
: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Noun
The Mustang Mach-E GT is (insanely) fast, handles well, is easy to charge, and has a solid hands-free driver assist system (BlueCruise). — Brooke Crothers, Forbes.com, 30 Aug. 2026 The Mach One vineyard was first planted to Cabernet Sauvignon in 2009, with Clones 685 and 412 chosen because they were considered virus-free at the time. — Mike Desimone, Robb Report, 30 Aug. 2026 Thomas Mach Interiors, of Simsbury, painted the interior and donated a consultation and project management services at the school. — Sean Krofssik, Hartford Courant, 28 Aug. 2026 Castelion says Blackbeard can exceed Mach 5 and strike targets up to 500 nautical miles away. — Aamir Khollam, Interesting Engineering, 26 Aug. 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

Phrases Containing mach

Rhymes for mach

See All Rhymes for mach

Browse Nearby Words

MacGyver
mach
Mach
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Cite this Entry

“Mach.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mach. Accessed 4 Sep. 2026.

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Kids Definition

Medical Definition

Mach

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