shock wave

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A large-amplitude compression wave, as that produced by an explosion or by supersonic motion of a body in a medium.
• noun A severe disruption, disturbance, or reaction.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun physics A powerful compression wave produced by the movement of a body through a fluid or gas at a velocity greater than the local speed of sound.
• noun Any violent disturbance.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

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