hypersonic

views updated Jun 27 2018

hy·per·son·ic / ˌhīpərˈsänik/ • adj. 1. relating to speeds of more than five times the speed of sound (Mach 5).2. relating to sound frequencies above about a thousand million hertz.DERIVATIVES: hy·per·son·i·cal·ly / -ik(ə)lē/ adv.