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

Examples of undetected in a Sentence

Recent Examples on the Web

Two Elmwood jail inmates were convicted at trial of murdering another inmate in a vicious gang beating that was executed over the course of 11 agonizing minutes, and went undetected even as it was recorded on surveillance cameras. — Robert Salonga, Mercury News, 15 Aug. 2026

Under Canadian law, refugees who sneak across the border and remain undetected for two weeks can then apply for asylum. — Trevor Hughes, USA Today, 15 Aug. 2026

This may mean that smaller-magnitude earthquakes, like the one offshore from Evanston last month and the one offshore from Door County, Wisconsin, two years ago, may have gone undetected. — Adam Harrington, CBS News, 12 Aug. 2026

Just eight vessels crossed the crucial waterway yesterday, five sticking to the Iranian route and three following an undetected route, maritime intelligence firm Kpler said. — Kevin Liptak, CNN Money, 11 Aug. 2026

Word History

First Known Use

circa 1602, in the meaning defined above

Rhymes for undetected

• disaffected
• disconnected
• disinfected
• interjected
• intersected
• misdirected
• preselected
• recollected
• reconnected
• redirected
• reelected
• resurrected