1) Postage mark, sometimes 2) Print 3) Surprint 4) To add an overprint to 5) To print too many copies of 1) Surprint 
An overprint is an additional layer of text or graphics added to the face of a postage stamp, banknote or postal stationery after it has been printed. Post offices most often use overprints for internal administrative purposes such as accounting but they are also employed in public mail. The most well-recognized varieties are commemorative overpri...
To print over a previously printed image.
[n] - something added by overprinting 2. [v] - print (additional text or colors) onto an already imprinted paper
To print one image over a previously printed image, such as printing type over a screen tint. Also called surprint.
surprint noun something added by overprinting
to print additional material or another color on a form or sheet previously printed.