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

The Espinal transaction went almost undetected. —Doug Padilla, Oc Register, 6 Mar. 2026

The scope of what may be going undetected is illustrated by a striking statistical pattern. —Marc Joffe, Daily News, 4 Mar. 2026

The concern here is that a case like this could signal undetected person-to-person spread of a virus that could have pandemic potential. —Theresa Gaffney, STAT, 2 Mar. 2026

The relaxed atmosphere and laid-back, routine lifestyle often seen in senior communities provides an optimal opening for criminals to learn the behaviors of their potential victims while remaining undetected. —Julia Bonavita, FOXNews.com, 1 Mar. 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