sound wavesound wave
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.
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)
A longitudinal pressure wave of audible or inaudible sound.