undiscovered
Britishadjective
Explanation
Undiscovered things haven't been found yet. You might dream of becoming an explorer and mapping undicovered lands — or you might hope to be a scientist who finds previously undiscovered cures for disease. Use this adjective for things that have remained unknown or not discovered for a long period of time. Some of these will be undiscovered only to you, like the undiscovered secret garden in your city or a pile of undiscovered postcards your grandparents sent each other. Undiscovered comes from the prefix un-, or "not," and discover, "reveal, uncover, or disclose."
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.
Even with more than 14,000 described species worldwide, researchers believe tens of thousands of millipede species may still be undiscovered.
From Science Daily • Jun. 14, 2026
That discrepancy excited physicists because it hinted at the possibility of undiscovered particles or even a new "fifth force" beyond the four known fundamental forces.
From Science Daily • May 19, 2026
The firm has delayed a general release of Mythos, which it says can spot undiscovered security holes that have existed for decades, in systems tested by both human experts and automated tools.
From Barron's • Apr. 22, 2026
“We think AI agents are very good at finding undiscovered, well-written research faster and cheaper than humans,” Pompliano said.
From The Wall Street Journal • Apr. 7, 2026
His experiments with electrical conductivity were a century ahead of their time, but unfortunately remained undiscovered until that century had passed.
From "A Short History of Nearly Everything" by Bill Bryson
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.
