Definition of invisible ink in English:

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invisible ink

noun

[mass noun]
A type of ink used to produce writing that cannot be seen until the paper is heated or otherwise treated.
Example sentences
  • Visitors to the open day were able to try their hand at a series of techniques such as passport forgery, code-breaking and writing in invisible ink.
  • Peggy wrote in invisible ink, literally between the lines of innocent letters, she wrote the troop movements, the intelligence that the British were paying for.
  • Ben is quick to deduce that the map to the treasure is inscribed in invisible ink of the back of the American Declaration of Independence.

For editors and proofreaders

Line breaks: in|vis¦ible ink

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