Definition: Meaning of, Mach in English to English dictionary.
Pronunciation:/ mɑːk;mak /
noun
synonym
antonym
Word Forms:
Singular
Plural
Mach
Machs
[uncountable]
a unit for measuring speed, especially of an aircraft, in relation to the speed of sound. Mach 1 is the speed of sound, Mach 2 is twice the speed of sound etc