(~s)
1.
Enamel is a substance like glass which can be heated and put onto metal, glass, or pottery in order to decorate or protect it.
...a white ~ saucepan on the oil stove.
...~ baths.
N-MASS: oft N n
2.
Enamel is a hard, shiny paint that is used especially for painting metal and wood.
...~ polymer paints...
N-MASS: oft N n
3.
Enamel is the hard white substance that forms the outer part of a tooth.
N-UNCOUNT