Source : Webster's Revised Unabridged Dictionary (1913)

Smooth \Smooth\, v. i.
   To flatter; to use blandishment.

         Because I can not flatter and speak fair, Smile in
         men's faces, smooth, deceive and cog.    --Shak.

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.

Smooth \Smooth\, adv.
   Smoothly. --Chaucer.

         Smooth runs the water where the brook is deep. --Shak.

Smooth \Smooth\, n.
   1. The act of making smooth; a stroke which smooths.
      --Thackeray.

   2. That which is smooth; the smooth part of anything. ``The
      smooth of his neck.'' --Gen. xxvii. 16.

Smooth \Smooth\, v. t. [imp. & p. p. {Smoothed} (sm[=oo]thd); p.
   pr. & vb. n. {Smoothing}.] [OE. smothen, smethen, AS.
   sm[=e][eth]ian; cf. LG. sm["o]den. See {Smooth}, a.]
   To make smooth; to make even on the surface by any means; as,
   to smooth a board with a plane; to smooth cloth with an iron.
   Specifically:
   (a) To free from obstruction; to make easy.

             Thou, Abelard! the last sad office pay, And smooth
             my passage to the realms of day.     --Pope.
   (b) To free from harshness; to make flowing.

             In their motions harmony divine So smooths her
             charming tones that God's own ear Listens
             delighted.                           --Milton.
   (c) To palliate; to gloze; as, to smooth over a fault.
   (d) To give a smooth or calm appearance to.

             Each perturbation smoothed with outward calm.
                                                  --Milton.
   (e) To ease; to regulate. --Dryden.

Source : WordNet®

smooth
     adj 1: having a surface free from roughness or bumps or ridges or
            irregularities; "smooth skin"; "a smooth tabletop";
            "smooth fabric"; "a smooth road"; "water as smooth as
            a mirror" [ant: {rough}]
     2: smoothly agreeable and courteous with a degree of
        sophistication; "he was too politic to quarrel with so
        important a personage"; "the hostess averted a
        confrontation between two guests with a diplomatic change
        of subject"; "the manager pacified the customer with a
        smooth apology for the error"; "affable, suave, moderate
        men...smugly convinced of their respectability" - Ezra
        Pound [syn: {politic}, {suave}]
     3: of the margin of a leaf shape; not broken up into teeth
        [ant: {rough}]
     4: not marked with wrinkles; "unwrinkled cheeks" [syn: {unwrinkled}]
     5: smooth and unconstrained in movement; "a long, smooth
        stride"; "the fluid motion of a cat"; "the liquid grace of
        a ballerina"; "liquid prose" [syn: {flowing}, {fluent}, {fluid},
         {liquid}]
     6: without breaks between notes; smooth and connected; "a
        legato passage" [syn: {legato}] [ant: {staccato}]
     7: without chinks or crannies [syn: {uncrannied}] [ant: {crannied}]
     8: lacking obstructions or difficulties; "the bill's path
        through the legislature was smooth and orderly"

smooth
     v 1: make smooth or smoother, as if by rubbing; "smooth the
          surface of the wood" [syn: {smoothen}] [ant: {roughen}]
     2: (of surfaces) make shine; "shine the silver, please";
        "polish my shoes" [syn: {polish}, {smoothen}, {shine}]
     3: free from obstructions; "smooth the way towards peace
        negociations" [syn: {smooth out}]

smooth
     n : the act of smoothing; "he gave his hair a quick smooth"