undeclared
Britishadjective
Explanation
Anything undeclared isn't stated or admitted to in a public way. An undeclared political candidate may be seriously considering running for President, but she hasn't officially announced it. An undeclared war is conflict and violence that affects people's lives despite the fact that no government is officially calling it a war. If you're a college student with an undeclared major, you haven't decided which subject to focus on. Once you choose, you'll have a declared major. When it comes to paying taxes, any income that someone hides from the IRS is also undeclared: "She had to pay a fine because of those undeclared tips."
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
It has even seemed at times like an undeclared war of the sexes is under way, but you would hardly know it from reading “Who Needs Friends.”
From The Wall Street Journal • Apr. 14, 2026
Dimona is widely believed to hold Israel's undeclared nuclear arsenal.
From Barron's • Mar. 28, 2026
On Saturday Iran also struck the town of Dimona in Israel's Negev desert, an area linked to Israel's undeclared nuclear programme.
From BBC • Mar. 23, 2026
The six American service members who died in this undeclared war were “heroes,” Leavitt said.
From Salon • Mar. 6, 2026
So it was a day of truce, though undeclared.
From "The Once and Future King" by T. H. White
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
