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Synonyms

undetected

British  
/ ˌʌndɪˈtɛktɪd /

adjective

  1. not perceived, noticed, or discovered

    the fake bomb passed undetected

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

WHO's Africa regional director Mohamed Yakub Janabi said Ebola had had a silent early phase, when symptoms resemble malaria or typhoid, meaning transmission can remain undetected.

From Barron's • May 22, 2026

The World Health Organization declared a global health emergency over an Ebola outbreak in the Democratic Republic of Congo and Uganda, warning that the epidemic could still be spreading undetected.

From The Wall Street Journal • May 17, 2026

A higher threshold may reduce wrongful interventions but could allow legitimate threats to go undetected.

From Salon • May 12, 2026

The sight of so many Newcastle players jogging back as goalscorer Adrien Truffert drifted into the box undetected in the 85th minute summed up the listlessness that has gripped them.

From BBC • Apr. 25, 2026

The longer the Nogtail is left undetected and the bigger it grows, the longer the blight on the farm into which it has entered.

From "Fantastic Beasts and Where to Find Them" by J.K. Rowling

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