1. Plural of mach; units of speed relative to the speed of sound.
Usage: Used in aviation and aeronautics to describe aircraft velocity.

Examples

• The fighter jet traveled at 2 machs, twice the speed of sound.
• Modern commercial aircraft typically cruise at around 0.85 machs.
• The test pilot pushed the experimental aircraft to 3 machs during the trial.
• At high machs, the aircraft experiences significant aerodynamic stress.