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invisible ink

noun
Origin of invisible ink
1675-1685
First recorded in 1675-85
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for invisible ink
Contemporary Examples
Historical Examples
  • It was a time of invisible ink, and Franklin instructed this committee how to use it.

    True to His Home Hezekiah Butterworth
  • Then she happened to remember that there was such a thing as invisible ink.

    The Million Dollar Mystery Harold MacGrath
  • You might have it treated with invisible ink, or write something else in, up above.

    Wunpost Dane Coolidge
  • "There may be writing on it with invisible ink," said one of his comrades.

    Peveril of the Peak Sir Walter Scott
  • Lafayette took the hint, and discovered the message written with this invisible ink on the bit of paper.

    Lafayette

    Martha Foote Crow
  • These "asides" seem to sprinkle one's conversations with words written, as it were, in invisible ink.

    Miss Million's Maid Bertha Ruck
  • "It's possible, of course, that there may be some writing in invisible ink on the sheet," admitted the cipher expert.

    On Secret Service William Nelson Taft
  • It was he who wrote that MS., and left the blanks, which are not blanks, but names written in invisible ink.

British Dictionary definitions for invisible ink

invisible ink

noun
1.
a liquid used for writing that does not become visible until it has been treated with chemicals, heat, ultraviolet light, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Difficulty index for invisible ink

Few English speakers likely know this word

Word Value for invisible

14
18
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