Source : Webster's Revised Unabridged Dictionary (1913)

Ravin \Rav"in\, Ravine \Ravine\, n. [See 2d {Raven}.]
   Food obtained by violence; plunder; prey; raven. ``Fowls of
   ravyne.'' --Chaucer.

         Though Nature, red in tooth and claw With ravine,
         shrieked against his creed.              --Tennyson.

Ravin \Rav"in\, Ravine \Rav"ine\, v. t. & i.
   See {Raven}, v. t. & i.

Ravine \Ra*vine"\, n. [F., a place excavated by a torrent, a
   ravine, fr. ravir to snatch or tear away, L. rapere; cf. L.
   rapina rapine. See {Ravish}, and cf. {Rapine}, {Raven} prey.]
   1. A torrent of water. [Obs.] --Cotgrave.

   2. A deep and narrow hollow, usually worn by a stream or
      torrent of water; a gorge; a mountain cleft.

Source : WordNet®

ravine
     n : a deep narrow steep-sided valley (especially one formed by
         running water)