Source : Webster's Revised Unabridged Dictionary (1913)

Smoother \Smooth"er\, n.
   One who, or that which, smooths.

Smooth \Smooth\ (sm[=oo][th]), a. [Compar. {Smoother} (-[~e]r);
   superl. {Smoothest}.] [OE. smothe, smethe, AS. sm[=e][eth]e,
   sm[oe][eth]e, where [=e], [oe], come from an older [=o]; cf.
   LG. sm["o]de, sm["o]e, sm["o]dig; of uncertain origin.]
   1. Having an even surface, or a surface so even that no
      roughness or points can be perceived by the touch; not
      rough; as, smooth glass; smooth porcelain. --Chaucer.

            The outlines must be smooth, imperceptible to the
            touch, and even, without eminence or cavities.
                                                  --Dryden.

   2. Evenly spread or arranged; sleek; as, smooth hair.

   3. Gently flowing; moving equably; not ruffled or obstructed;
      as, a smooth stream.

   4. Flowing or uttered without check, obstruction, or
      hesitation; not harsh; voluble; even; fluent.

            The only smooth poet of those times.  --Milton.

            Waller was smooth; but Dryden taught to join The
            varying verse, the full-resounding line. --Pope.

            When sage Minerva rose, From her sweet lips smooth
            elocution flows.                      --Gay.

   5. Bland; mild; smoothing; fattering.

            This smooth discourse and mild behavior oft Conceal
            a traitor.                            --Addison.

   6. (Mech. & Physics) Causing no resistance to a body sliding
      along its surface; frictionless.

   Note: Smooth is often used in the formation of selfexplaining
         compounds; as, smooth-bodied, smooth-browed,
         smooth-combed, smooth-faced, smooth-finished,
         smooth-gliding, smooth-grained, smooth-leaved,
         smooth-sliding, smooth-speaking, smooth-woven, and the
         like.

   Syn: Even; plain; level; flat; polished; glossy; sleek; soft;
        bland; mild; soothing; voluble; flattering; adulatory;
        deceptive.

Source : WordNet®

smoother
     n : a power tool used for sanding wood; a loop of sandpaper is
         moved at high speed by an electric motor [syn: {drum
         sander}, {electric sander}, {sander}]