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

Anthropic’s Mythos early preview model and Project Glasswing are raising critical awareness of undetected vulnerabilities and the need for stronger security controls. — Will Townsend, Forbes.com, 7 Aug. 2026

The Federal Aviation Administration has ordered inspections of hundreds of Boeing 737 Max jets for cracks in the body of the plane, warning that undetected damage could reduce the aircraft’s structural integrity. — Pete Muntean, CNN Money, 6 Aug. 2026

Kreutzer was inspired to write Gentle Monster after reading an article about the undetected prevalence of predators, working on it in the immediate aftermath of that scandal. — David Canfield, HollywoodReporter, 6 Aug. 2026

At one point, about an hour before he was discovered, the plane was moved to a parking space, but Lackey remained undetected. — Shira Moolten, Sun Sentinel, 6 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