The airplane flew at a speed of two Mach.
A unit of measurement for speed, specifically the ratio of the speed of an object to the speed of sound.
The Mach speed of the jet was impressive.
Describing something that is related to or operates at a speed equal to or greater than the speed of sound.
The rocket will mach across the sky.
To move or travel at a speed equal to or greater than the speed of sound.
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