Hypersonic vs Sonic - What's the difference?
hypersonic | sonic |
(of a speed, aviation) equal to, or greater than, or capable of achieving, five times the speed of sound.
(of a speed, aeronautics) far enough above the speed of sound as to cause significant differences in behaviour due to chemical reactions or disassociation of the air.
of or relating to sound
having a speed approaching that of the speed of sound in air