overglaze

noun

1. a color or glaze applied to an existing glaze.

verb (used with object), o·ver·glazed, o·ver·glaz·ing.

2. to cover or decorate (a ceramic object) with an overglaze.

adjective

3. used as an overglaze.
4. (of painted or printed decorations) applied over a glaze.

adjective

1. (of decoration or colours) applied to porcelain or pottery above the glaze