invisible ink

[ in-viz-uh-buhl ingk ]

noun
  1. a fluid for producing writing that is invisible until brought out by heat, chemicals, etc.

Origin of invisible ink

1
First recorded in 1675–85

Words Nearby invisible ink

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use invisible ink in a sentence

  • Here for some reason the invisible ink answered less reluctantly to the warmth of the blue flames' invitation.

    The Messenger | Elizabeth Robins
  • Our censor chaps at home have got to be quite expert at reading letters, invisible ink and all that sort of thing.

    The Apartment Next Door | William Andrew Johnston
  • By writing in newspapers, sometimes with invisible ink or by enclosing accounts or letters in them.

    The History of the British Post Office | Joseph Clarence Hemmeon

British Dictionary definitions for invisible ink

invisible ink

noun
  1. a liquid used for writing that does not become visible until it has been treated with chemicals, heat, ultraviolet light, etc

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012