Definition of invisible ink in English:

invisible ink

Line breaks: in|vis¦ible ink


[mass noun]
A type of ink used to produce writing that cannot be seen until the paper is heated or otherwise treated.
More 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.

Definition of invisible ink in:

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Word of the day nous
Pronunciation: naʊs
common sense; practical intelligence