Source : Webster's Revised Unabridged Dictionary (1913)

Sole \Sole\, n. [AS. sole, fr. L. soolea (or rather an assumed
   L. sola), akin to solumround, soil, sole of the foot. Cf.
   {Exile}, {Saloon}, {Soil} earth, {Sole} the fish.]
   1. The bottom of the foot; hence, also, rarely, the foot
      itself.

            The dove found no rest for the sole of her foot.
                                                  --Gen. viii.
                                                  9.

            Hast wandered through the world now long a day, Yet
            ceasest not thy weary soles to lead.  --Spenser.

   2. The bottom of a shoe or boot, or the piece of leather
      which constitutes the bottom.

            The ``caliga'' was a military shoe, with a very
            thick sole, tied above the instep.    --Arbuthnot.

   3. The bottom or lower part of anything, or that on which
      anything rests in standing. Specifially:
      (a) (Agric.) The bottom of the body of a plow; -- called
          also {slade}; also, the bottom of a furrow.
      (b) (Far.) The horny substance under a horse's foot, which
          protects the more tender parts.
      (c) (Fort.) The bottom of an embrasure.
      (d) (Naut.) A piece of timber attached to the lower part
          of the rudder, to make it even with the false keel.
          --Totten.
      (e) (Mining) The seat or bottom of a mine; -- applied to
          horizontal veins or lodes.

   {Sole leather}, thick, strong, used for making the soles of
      boots and shoes, and for other purposes.