blast wave

[Gregory]

a region of high pressure travelling through a gas at a high velocity

[Hina Muqadas]

A blast wave in fluid dynamics is the pressure and flow resulting from the deposition of a large amount of energy in a small very localised volume. The flow field can be approximated as a lead shock wave, followed by a self-similar subsonic flow field. In simpler terms, a blast wave is an area of pressure expanding supersonically outward from an explosive core. It has a leading shock front of compressed gases. The blast wave is followed by a blast wind of negative pressure, which sucks items back in towards the center. The blast wave is harmful especially when one is very close to the center or at a location of constructive interference. High explosives, which detonate, generate blast waves.

[Monty]

A sharply defined wave of increased pressure rapidly propagated through a surrounding medium from a center of detonation or similar disturbance.