What does "enamel" mean?

Additional senses

1. 2.That which is enameled; also, any smooth, glossy surface, resembling enamel, especially if variegated.
2. 3.(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.
3. 4.To lay enamel upon; to decorate with enamel whether inlaid or painted.
4. 5.To variegate with colors as if with enamel. Oft he [the serpent]bowed His turret crest and sleek enameled neck. Milton.
5. 6.To form a glossy surface like enamel upon; as, to enamel card paper; to enamel leather or cloth.
6. 7.To disguise with cosmetics, as a woman's complexion.
7. 8.To practice the art of enameling.
8. 9.Relating to the art of enameling; as, enamel painting. Tomlinson.