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countermark

noun

noun Definition from Wiktionary (CC BY-SA). More about countermark at Wordnik → Where our words come from →

  1. A mark or token added to those already existing, as a security or proof.
  2. An artificial cavity made in the teeth of horses that have outgrown their natural mark, to disguise their age.

verb

  1. To apply a countermark to.
    to countermark silverware

Origin

From counter- + mark.

From Wiktionary, via Kaikki.org (CC BY-SA)