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

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

Dictionary Entries Near mach

Cite this Entry

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

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

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

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