invisible ink Hear it!

invisible ink Definition

invisible ink

noun

a colorless ink that cannot be seen on paper until it is treated with heat, vapor, or a chemical

invisible ink Usage Examples

Preposition: on

  • bottom: Use them to put your postcode and house number in invisible ink on the bottom of your valuables.

Adjective modifier

  • own: In this section, we'll show you how it's been used and tell you how you can make your own invisible ink.