Definition of mach

 (Entry 1 of 3)

Mach

noun
\ ˈmäk How to pronounce Mach (audio) \

Definition of Mach (Entry 2 of 3)

: a usually high speed expressed by a Mach number an airplane flying at Mach 2

Mach

biographical name
\ ˈmäḵ How to pronounce Mach (audio) , ˈmäk \

Definition of Mach (Entry 3 of 3)

Ernst 1838–1916 Austrian physicist and philosopher

First Known Use of mach

Noun

1946, in the meaning defined above

History and Etymology for mach

Noun

Mach number

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Cite this Entry

“Mach.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mach. Accessed 24 Jun. 2021.

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More Definitions for mach

Mach

noun

English Language Learners Definition of Mach

technical used to indicate the high speed of something (such as an airplane) by comparing it to the speed of sound

Mach

noun
\ ˈmäk How to pronounce Mach (audio) \

Medical Definition of Mach

: a usually high speed expressed by a Mach number an airplane flying at Mach 2

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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