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

Word History

Etymology

Noun

Mach number

First Known Use

Noun

1946, in the meaning defined above

Time Traveler
The first known use of mach was in 1946

Phrases Containing mach

Dictionary Entries Near mach

Mach

mach

Machabees

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Cite this Entry

“Mach.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mach. Accessed 24 Mar. 2023.

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Kids Definition

Mach

noun
ˈmäk How to pronounce Mach (audio)
: mach number

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
Ernst 1838–1916 Austrian physicist and philosopher

More from Merriam-Webster on mach

Nglish: Translation of mach for Spanish Speakers

Britannica English: Translation of mach for Arabic Speakers

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