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

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These days, most red-letter sins in NCAA sports come in gray, and more often invisible ink. Fort Worth Star-Telegram, 8 June 2026 One drink opened the chest, two turned fear into courage’s cheap cousin, three steadied the hand enough to write the future in invisible ink. Brittany Allen, Literary Hub, 19 May 2026 How The Realest, a barely three-year-old start-up, found its way into the inner sanctum of the defending Super Bowl champions is nearly as interesting as its cloak-and-dagger business, complete with proprietary invisible ink placed in a secret spot on select memorabilia by retired police officers. Dana O’Neil, CNN Money, 11 Jan. 2026 In the middle of 25th St, a man opens a red stanchion and ushers us toward a guard who stamps invisible ink on our wrists. Kieran Press-Reynolds, Pitchfork, 24 Sep. 2025

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“Invisible ink.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invisible%20ink. Accessed 5 Jul. 2026.

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