The Collaborative International Dictionary of English v.0.48:

Ripple \Rip"ple\, n. [From Rip, v.]
   An implement, with teeth like those of a comb, for removing
   the seeds and seed vessels from flax, broom corn, etc.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ripple \Rip"ple\, v. t.
   1. To remove the seeds from (the stalks of flax, etc.), by
      means of a ripple.
      [1913 Webster]

   2. Hence, to scratch or tear. --Holland.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ripple \Rip"ple\, v. i. [imp. & p. p. Rippled; p. pr. & vb. n.
   Rippling.] [Cf. Rimple, Rumple.]
   1. To become fretted or dimpled on the surface, as water when
      agitated or running over a rough bottom; to be covered
      with small waves or undulations, as a field of grain.
      [1913 Webster]

   2. To make a sound as of water running gently over a rough
      bottom, or the breaking of ripples on the shore.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ripple \Rip"ple\, v. t.
   To fret or dimple, as the surface of running water; to cover
   with small waves or undulations; as, the breeze rippled the
   lake.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ripple \Rip"ple\, n.
   1. The fretting or dimpling of the surface, as of running
      water; little curling waves.
      [1913 Webster]

   2. A little wave or undulation; a sound such as is made by
      little waves; as, a ripple of laughter.
      [1913 Webster]

   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.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ripple
    n 1: a small wave on the surface of a liquid [syn: ripple,
         rippling, riffle, wavelet]
    2: (electronics) an oscillation of small amplitude imposed on
       top of a steady value
    v 1: stir up (water) so as to form ripples [syn: ripple,
         ruffle, riffle, cockle, undulate]
    2: flow in an irregular current with a bubbling noise; "babbling
       brooks" [syn: ripple, babble, guggle, burble,
       bubble, gurgle]