1. A second or third mark put on a bale of goods belonging to several merchants, that it may not be opened but in the presence of all the owners; the mark of the Goldsmiths' Company to show the metal to be standard; an artificial cavity made in the teeth of horses to disguise their age; a mark added to a medal long after it has been struck, by which the change in its value may be known.

2. To add a countermark.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• countermarc,
• countermarch,
• xountermark,
• vountermark,
• fountermark,
• dountermark,
• ciuntermark,
• ckuntermark,
• cluntermark,
• cpuntermark,
• c0untermark,
• c9untermark,
• coyntermark,
• cohntermark,
• cojntermark,
• cointermark,
• co8ntermark,
• co7ntermark,
• Countermarke,
• Countermarkes

The plural of the "Countermark" can be the "countermarks".

The singular of the "Countermark" can be the "Countermark".