overprint

To print over what has already been printed.

To add an overprint to (a stamp).

To overlap different colours to avoid gaps.

To print too many copies of.

To superimpose a new set of petrological, structural, and/or mineralogical characteristics onto rock by the action of geological processes over deep time.

An addition of new text on a previously printed stamp, usually to add a surcharge or change the face value.

The set of petrological, structural, and/or mineralogical characteristics superimposed onto rock by the action of geological processes over deep time.