Source : Webster's Revised Unabridged Dictionary (1913)

Enamel \En*am"el\, n.
   1. Any one of various preparations for giving a smooth,
      glossy surface like that of enamel.

   2. A cosmetic intended to give the appearance of a smooth and
      beautiful complexion.

Enamel \En*am"el\, n. [Pref. en- + amel. See {Amel}, {Smelt}, v.
   t.]
   1. A variety of glass, used in ornament, to cover a surface,
      as of metal or pottery, and admitting of after decoration
      in color, or used itself for inlaying or application in
      varied colors.

   2. (Min.) A glassy, opaque bead obtained by the blowpipe.

   3. That which is enameled; also, any smooth, glossy surface,
      resembling enamel, especially if variegated.

   4. (Anat.) The intensely hard calcified tissue entering into
      the composition of teeth. It merely covers the exposed
      parts of the teeth of man, but in many animals is
      intermixed in various ways with the dentine and cement.

   {Enamel painting}, painting with enamel colors upon a ground
      of metal, porcelain, or the like, the colors being
      afterwards fixed by fire.

   {Enamel paper}, paper glazed a metallic coating.

Enamel \En*am"el\, v. t. [imp. & p. p. {Enameled}or {Enamelled};
   p. pr. & vb. n. {Enameling} or {Enamelling}.]
   1. To lay enamel upon; to decorate with enamel whether inlaid
      or painted.

Enamel \En*am"el\, v. i.
   To practice the art of enameling.

Enamel \En*am"el\, a.
   Relating to the art of enameling; as, enamel painting.
   --Tomlinson.

Source : WordNet®

enamel
     n 1: hard white substance covering the crown of a tooth [syn: {tooth
          enamel}]
     2: a colored glassy compound (opaque or partially opaque) that
        is fused to the surface of metal or glass or pottery for
        decoration or protection
     3: a paint that dries to a hard glossy finish
     4: any smooth glossy coating that resembles ceramic glaze
     v : coat, inlay, or surface with enamel
     [also: {enamelling}, {enamelled}]