Source : Webster's Revised Unabridged Dictionary (1913)

Ripple \Rip"ple\, n.
   1. The fretting or dimpling of the surface, as of running
      water; little curling waves.

   2. A little wave or undulation; a sound such as is made by
      little waves; as, a ripple of laughter.

   3. (physics) a small wave on the surface of water or other
      liquids for which the driving force is not gravity, but
      surface tension.

   4. (Electrical engineering) the residual AC component in the
      DC current output from a rectifier, expressed as a
      percentage of the steady component of the current.

   {Ripple grass}. (Bot.) See {Ribwort}.

   {Ripple marks}, a system of parallel ridges on sand, produced
      by wind, by the current of a steam, or by the agitation of
      wind waves; also (Geol.), a system of parallel ridges on
      the surface of a sandstone stratum.