- The definition of a sound wave is a pressure caused by the vibration of something in a medium that transfers energy, like air.
An example of a sound wave is a burst of loud music through a quiet forest.
sound wave definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Physics a longitudinal pressure wave stimulated by a mechanical disturbance of an elastic medium, as air, at some source and propagated by the action of disturbed particles on adjacent particles; esp., any of such waves within the range of those audible to the human ear (c. 15 cycles to 20,000 cycles per second)
sound wave definition by American Heritage Dictionary
A longitudinal pressure wave of audible or inaudible sound.