noun. 
                    In ceramics, a vitrified substance, either transparent or opaque, applied as a coating to pottery and porcelain of many kinds.
                  
                
                  
                    noun. 
                    In the fine arts, a vitreous substance or glass, opaque or transparent, and variously colored, applied as a coating on a surface of metal or of porcelain (see def. 1) for purposes of decoration.
                  
                
                  
                    noun. 
                    Enamel-work: a piece or sort of work whose chief decorative quality lies iu the enamel itself: as, a fine piece of cloisonné enamel; a specimen of enamel à jour.
                  
                
                  
                    noun. 
                    Any smooth, glossy surface resembling enamel, but produced by means of varnish or lacquer, or in some other way not involving vitrification: as, the enamel of enameled leather, paper, slate, etc.
                  
                
                  
                    noun. 
                    In anatomy, the hardest part of a tooth; the very dense, smooth, glistening substance which crowns a tooth or coats a part of its surface: distinguished from dentin and from cement.
                  
                
                  
                    noun. 
                    Figuratively, gloss; polish.
                  
                
                  
                    noun. 
                    In cosmetics, a coating applied to the skin, giving the appearance of a beautiful complexion.
                  
                
                  
                    noun. 
                    The firm white substance which covers the bony scales of some ganoid fishes.
                  
                
                  
                    
                    To lay enamel upon; cover or decorate with enamel.
                  
                
                  
                    
                    To form a glossy surface like enamel upon: as, to enamel cardboard; specifically, to use an enamel upon the skin.
                  
                
                  
                    
                    To variegate or adorn with different colors.
                  
                
                  
                    
                    To practise the use of enamel or the art of enameling.