undetected
adjective
un·de·tect·ed
ˌən-di-ˈtek-təd 
-dē-
: not observed, noticed, or detected
an undetected flaw/error
an undetected illness
These rare mistakes are subtle and may go undetected for months and even years.—
Mario Salvadori
Mario Salvadori
Examples of undetected in a Sentence
Recent Examples on the Web
The hackers first gained access in August 2021 and went undetected until October 2022, the agency said.
—Kevin Collier, NBC News, 8 Aug. 2023
Emerald ash borer is a silent, rapid tree killer that lives, often undetected, under the bark of ash trees for 10 months of the year.
—Claire Reid, Journal Sentinel, 2 Aug. 2023
Nevertheless, in most cases, syphilis goes undetected because the signs and symptoms are misinterpreted or unnoticed.
—Julia Musto, Fox News, 14 July 2023
Key Takeaways Experts say SARS-CoV-2 has not mutated enough to go undetected by rapid antigen tests.
—Carla Delgado, Verywell Health, 31 Aug. 2023
And yet, the Russian sabotage ring went undetected until a passerby noticed a camera lens peeking out from the trees and shrubs along an important stretch of track and reported the discovery to authorities, officials said.
—Mary Ilyushina, Washington Post, 18 Aug. 2023
Roughly four in 10 adults said that they were concerned a family member would unintentionally ingest fentanyl, a potent and deadly synthetic opioid that is often mixed into other drugs or counterfeit pills and that can go undetected.
—Noah Weiland, New York Times, 15 Aug. 2023
Ellison confessed to a central role in a scheme defrauding investors of billions of dollars that went undetected, McGraw said.
—Larry Neumeister, Fortune, 11 Aug. 2023
Ellison confessed to a central role in a scheme defrauding investors of billions of dollars that went undetected, McCraw said.
—Larry Neumeister, Anchorage Daily News, 11 Aug. 2023
See More
Kevin Collier, NBC News, 8 Aug. 2023
Emerald ash borer is a silent, rapid tree killer that lives, often undetected, under the bark of ash trees for 10 months of the year.
—Claire Reid, Journal Sentinel, 2 Aug. 2023
Nevertheless, in most cases, syphilis goes undetected because the signs and symptoms are misinterpreted or unnoticed.
—Julia Musto, Fox News, 14 July 2023
Key Takeaways Experts say SARS-CoV-2 has not mutated enough to go undetected by rapid antigen tests.
—Carla Delgado, Verywell Health, 31 Aug. 2023
And yet, the Russian sabotage ring went undetected until a passerby noticed a camera lens peeking out from the trees and shrubs along an important stretch of track and reported the discovery to authorities, officials said.
—Mary Ilyushina, Washington Post, 18 Aug. 2023
Roughly four in 10 adults said that they were concerned a family member would unintentionally ingest fentanyl, a potent and deadly synthetic opioid that is often mixed into other drugs or counterfeit pills and that can go undetected.
—Noah Weiland, New York Times, 15 Aug. 2023
Ellison confessed to a central role in a scheme defrauding investors of billions of dollars that went undetected, McGraw said.
—Larry Neumeister, Fortune, 11 Aug. 2023
Ellison confessed to a central role in a scheme defrauding investors of billions of dollars that went undetected, McCraw said.
—Larry Neumeister, Anchorage Daily News, 11 Aug. 2023
See More
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'undetected.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Word History
First Known Use
circa 1602, in the meaning defined above
Dictionary Entries Near undetected
Cite this Entry
“Undetected.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undetected. Accessed 28 Sep. 2023.
Copy Citation
More from Merriam-Webster on undetected
Thesaurus: All synonyms and antonyms for undetected
Love words? Need even more definitions?
Merriam-Webster unabridged
Share