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

As a result of the fine, Treasury said that Bank of America will work with a third party to report any further transactions to FinCEN that had gone undetected. — Arkansas Online, 14 Oct. 2026

Short text, editing, translation and unsupported models can all produce undetected content. — Aamir Khollam, Interesting Engineering, 5 Oct. 2026

Aviation security analysts told the Journal the episode represented a significant security failure and raised questions about how warning signs may have gone undetected before the co-pilot entered the cockpit. — Brittany Miller , John Roberts, FOXNews.com, 2 Oct. 2026

The prime minister of the Democratic Republic of Congo rejected framing the country’s relations with Washington as solely based around minerals, and offered a frank account of the cause of early Ebola cases remaining undetected. — Adrian Elimian, semafor.com, 22 Sep. 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