from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An explosive sound caused by the shock wave preceding an aircraft traveling at or above the speed of sound.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The audible effect of a shock wave in the air, especially one caused by an aircraft flying faster then the speed of sound
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an explosive sound caused by the shock wave of an airplane traveling faster than the speed of sound
Sorry, no etymologies found.