Definition of mach 

(Entry 1 of 3)

Mach

noun
\ ˈmäk \

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 , 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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Time Traveler for mach

The first known use of mach was in 1946

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More Definitions for mach

Mach

noun

English Language Learners Definition of Mach

 (Entry 1 of 2)

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

Mach

noun

English Language Learners Definition of Mach (Entry 2 of 2)

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

Mach

noun
\ ˈmäk \

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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