invisible ink
noun
: ink that can only be seen when it is specially treated in some way
a message written in invisible ink
Examples of invisible ink in a Sentence
Recent Examples on the Web
America’s first spies spent the Revolutionary War using ciphers, clandestine courier networks, and invisible ink to correspond with each other and their foreign allies.
—
William J. Burns, Foreign Affairs, 30 Jan. 2024
President Obama wrongly drew a red line with invisible ink.
—Laurence Needleman, WSJ, 21 Nov. 2023
William J. Burns, Foreign Affairs, 30 Jan. 2024
President Obama wrongly drew a red line with invisible ink.
—Laurence Needleman, WSJ, 21 Nov. 2023
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'invisible ink.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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“Invisible ink.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invisible%20ink. Accessed 26 Apr. 2024.
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