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 SalvadoriExamples of undetected in a Sentence
Recent Examples on the Web
The outbreak was identified last week in Congo, but Ebola was likely spreading undetected for weeks before that.
—Erika Edwards, NBC news, 20 May 2026
Such cases often go undetected for cultural reasons.
—Yudhijit Bhattacharjee, New Yorker, 18 May 2026
Health experts are growing increasingly alarmed about the outbreak, arguing that cases have been spreading undetected as public health authorities are stretched thin.
—Lauren Weber, Washington Post, 18 May 2026
The Bundibugyo strain spread undetected for at least a few weeks, health experts and aid workers said.
—Jean-Yves Kamale, Los Angeles Times, 18 May 2026
See All Example Sentences for undetected
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Erika Edwards, NBC news, 20 May 2026
Such cases often go undetected for cultural reasons.
—Yudhijit Bhattacharjee, New Yorker, 18 May 2026
Health experts are growing increasingly alarmed about the outbreak, arguing that cases have been spreading undetected as public health authorities are stretched thin.
—Lauren Weber, Washington Post, 18 May 2026
The Bundibugyo strain spread undetected for at least a few weeks, health experts and aid workers said.
—Jean-Yves Kamale, Los Angeles Times, 18 May 2026
See All Example Sentences for undetected
Cite this Entry
“Undetected.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undetected. Accessed 28 May. 2026.
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