Pronunciations (3)
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/mɑːk/
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/mæk/
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/maːx/
Proper noun
A surname from Czech.
Ernst Mach, Austrian physicist (1838–1916), born in Moravia (now Czech Republic).
Noun
A ratio of the speed (of an object, etc.) to the speed of sound in the fluid or other medium through which the object travels. Usually used to describe supersonic speeds; always precedes the Mach number.
Usage- Uncountable
- Examples
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The jet traveled at Mach 3.