Thin, opaque, vitreous coating that is applied to the surface of a ceramic body by painting, spraying, or dipping, in order to add color, texture, or water resistance to the object. The glaze is applied to the surface of a fired ceramic piece, and then the piece is refired at a temperature that vitrifies the glaze, but is lower than the original firing temperature. Ceramic glazes are usually mixtures of silicates, colorants, and flux.