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
How the system works Hypersonic vehicles travel at speeds of more than Mach 5, or five times the speed of sound. Georgina Jedikovska, Interesting Engineering, 2 July 2026 The Oklahoma Corporation Commission declined to comment for this story, citing the ongoing case, as did the Flying Monkey’s current operator, BCE-Mach III Midstream Holdings LLC. Nick Bowlin, ProPublica, 30 June 2026 This month Ford confirmed that the Mach-E will stay behind as the company moves its future EV lineup to the new Universal EV Platform. Sasha Lekach, Forbes.com, 27 June 2026 To get the full incentive, Mach Industries would have to hire a minimum of 1,000 people with a minimum average salary of $67,470, according to the city’s presentation. Harrison Mantas, Fort Worth Star-Telegram, 23 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 4 Jul. 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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