Definition of hypersonic in English:


Syllabification: hy·per·son·ic
Pronunciation: /ˌhīpərˈsänik


  • 1Relating to speeds of more than five times the speed of sound (Mach 5).
    More example sentences
    • In the case of X - 43, the thrust will propel the vehicle at hypersonic speeds up to Mach 10.
    • The X - 43A is the first aircraft to reach hypersonic speeds using an air-breathing engine.
    • He remembered the planning for hypersonic flight, faster than five times the speed of sound, leading up to the X - 15 program.
  • 2Relating to sound frequencies above about a thousand million hertz.
    More example sentences
    • We've heard hypersonic sound.



Pronunciation: /-ik(ə)lē/
More example sentences
  • Indeed, humans have been flying hypersonically for over four decades.
  • The space shuttle is coasting from a very high speed and high altitude when it flies hypersonically.
  • The first shock wave is created as the air in the barrel is compressed by the front of the projectile as it travels hypersonically down the barrel.


1930s (sense 2): from hyper- 'beyond, exceeding', on the pattern of supersonic and ultrasonic.

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