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 includes the Ford Mustang Mach-E, the Toyota bZ series, the Honda Prologue, Nissan’s growing EV lineup, Volkswagen’s electric models, and CDJR electric vehicles. Rancho Santa Fe Review, San Diego Union-Tribune, 26 May 2026 Many major EVs, like Ford’s Mustang Mach-E, struggle to do half that at peak. Tim Stevens, ArsTechnica, 26 May 2026 Its SpaceShipTwo was to be launched from mother ship WhiteKnightTwo, then rocketed into space at Mach 3 before gliding back. Michael Goldstein, Forbes.com, 24 May 2026 After flying at a speed of Mach 7, Starship lit two of its engines before splashing down vertically in the Indian Ocean. Lora Kolodny, CNBC, 22 May 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 31 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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