1. An advancing ridge or swell on the surface of a liquid, as of the sea, resulting from the oscillatory motion of the particles composing it when disturbed by any force their position of rest; an undulation. The wave behind impels the wave before. (pope)
2. (Science: physics) A vibration propagated from particle to particle through a body or elastic medium, as in the transmission of sound; an assemblage of vibrating molecules in all phases of a vibration, with no phase repeated; a wave of vibration; an undulation. See Undulation.
Origin: From Wave,; not the same word as OE. Wawe, waghe, a wave, which is akin to E. Wag to move. See Wave.