You searched for: “hypersonic
hypersonic (high" pur SAHN ik)
1. Much faster than the speed of sound.
2. Relating to speeds five or more times than that of the normal speed of sound in the air; such as, rockets, certain air currents, aircraft, etc.
This entry is located in the following units: hyper-, hyp- (page 15) sono-, son-, sona-, -sonous, -sonic, -sonically (page 1)