Greater than the speed of sound (in the same medium, and at the same temperature and pressure).
Ultrasonic, having a frequency too high to be audible.
An aircraft that can travel at the speed of sound.
Causing or relating to increased speed.
Very, super, etc.; usually relating to a qualitative value (as opposed to quantitative).
With rapidly-increasing blind levels.
To autofire.
a turbine
A turban shell.
Autofire.