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
Simpson’s paradox often appears when there are undetected factors that influence an outcome.
—Manon Bischoff, Scientific American, 31 Mar. 2026
Her cancer was an unusual and distinct kind called diffuse gastric cancer, in which cancerous cells percolate undetected through the stomach, forming obvious masses only in advanced stages—usually too late to treat.
—Sarah Zhang, The Atlantic, 31 Mar. 2026
Inside the airport, their presence is almost undetected.
—Irene Wright, USA Today, 23 Mar. 2026
Nine Iranian ships traveled through the strait by turning off transponders that reveal locations, sneaking by undetected.
—Cecilia Vega, CBS News, 15 Mar. 2026
See All Example Sentences for undetected
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Manon Bischoff, Scientific American, 31 Mar. 2026
Her cancer was an unusual and distinct kind called diffuse gastric cancer, in which cancerous cells percolate undetected through the stomach, forming obvious masses only in advanced stages—usually too late to treat.
—Sarah Zhang, The Atlantic, 31 Mar. 2026
Inside the airport, their presence is almost undetected.
—Irene Wright, USA Today, 23 Mar. 2026
Nine Iranian ships traveled through the strait by turning off transponders that reveal locations, sneaking by undetected.
—Cecilia Vega, CBS News, 15 Mar. 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 5 Apr. 2026.
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