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codeword

British  
/ ˈkəʊdˌwɜːd /

noun

  1. Also: codename.  (esp in military use) a word used to identify a classified plan, operation, 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

Example Sentences

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On top of this, the Ask for Ani codeword scheme, which allows victims or those at risk of abuse to discreetly signal they need help, is to be further piloted in Jobcentres around the country.

From BBC Feb. 19, 2023

We’ve all seen the cryptic notations on these documents about special compartments and codeword protections for human and signals intelligence.

From Washington Post Sep. 6, 2022

The film’s title is a banking codeword for “be quiet, careful what you say,” and the story prefers the horrors of the unsaid.

From Los Angeles Times Dec. 20, 2021

It’s certainly what I was shouting out loud at my screen as I watched, and I wasn’t the one forced to say such a silly codeword on an adult reality show.

From Slate Jul. 29, 2021

Thus "amber" is the codeword for £1; "heliotrope" for £20; "rainbow" for "win and 1, 2."

From Punch, or the London Charivari, Vol. 146, April 8, 1914 by Various

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