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
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William J. Burns, Foreign Affairs, 30 Jan. 2024
President Obama wrongly drew a red line with invisible ink.
—Laurence Needleman, WSJ, 21 Nov. 2023
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“Invisible ink.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invisible%20ink. Accessed 5 Nov. 2024.
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