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

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Mark your property: Use invisible ink or engrave your decorations with a unique identifier. —

Kurt Knutsson, Cyberguy Report, Fox News, 14 Dec. 2024 Voted the second-best city in the world by Condé Nast Traveler readers for 2024, Singapore has a few tenets written in invisible ink. —

Audrey Phoon, Condé Nast Traveler, 10 Dec. 2024 An invisible ink stamp from Roya’s earlier party on his right wrist? —

Sophie Brookover, Vulture, 31 Oct. 2024 Roya had hosted a party the night before, which didn’t have a metal detector but did use invisible ink stamps to show who had been admitted. —

Sophie Brookover, Vulture, 31 Oct. 2024 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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“Invisible ink.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invisible%20ink. Accessed 31 Dec. 2024.

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