un·​de·​tect·​able | \ ˌən-di-ˈtek-tə-bəl How to pronounce undetectable (audio) , -dē- \

Definition of undetectable

: unable to be detected : impossible to discover or notice : not detectable an almost undetectable change undetectable traces of poison Signs of life may be so minimal as to be undetectable by modern instruments …— Lauren J. Livo

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Other Words from undetectable

undetectably \ ˌən-​di-​ˈtek-​tə-​blē How to pronounce undetectably (audio) , -​dē-​ \ adverb
an undetectably small change

Examples of undetectable in a Sentence

Recent Examples on the Web The numbers seem to keep changing, but new research has found that the virus that causes COVID-19 is undetectable on books and other common materials after three days. Jessica Flores, USA TODAY, "Coronavirus updates: More states close bars, slow reopening plans; Gilead Sciences sets price for remdesivir treatments," 29 June 2020 Smaller shreds, undetectable to the naked eye and more prevalent, had circulated in atmospheric channels, like the jet stream, and found their way across oceans before descending. Kurtis Alexander, SFChronicle.com, "Plastic particles are raining from the sky — just another front for a pervasive pollutant," 23 June 2020 Escort says its new Redline 360C uses artificial intelligence, Wi-Fi, and GPS to make this latest radar detector advanced, highly sensitive, and undetectable. K.c. Colwell, Car and Driver, "First Look at the Escort Redline 360c, a Thoroughly Modern Radar Detector," 9 June 2020 With antiretroviral therapy, people with HIV can reduce the viral load enough that it is considered to be undetectable. Amy Dickinson, Detroit Free Press, "Son Zooms in with a zinger," 17 May 2020 With antiretroviral therapy, people with HIV can reduce the viral load enough that it is considered to be undetectable. Amy Dickinson, oregonlive, "Ask Amy: Gay son reveals new boyfriend is HIV-positive," 17 May 2020 Also unclear was why the file was undetectable by AV and precisely how the malicious file was executed after the AV or a reboot removed the infection. Dan Goodin, Ars Technica, "The secret behind “unkillable” Android backdoor called xHelper has been revealed," 16 Apr. 2020 The Chrysler tranny also has a tendency to surge at idle, but its lockup action is virtually undetectable. Michael Jordan, Car and Driver, "Tested: 1982 Maserati Quattroporte," 21 Apr. 2020 Differences in brightness from scope to scope are often undetectable to users. Ron Spomer, Outdoor Life, "The Truth About Riflescope Brightness (And How to Pick the Best Hunting Scope for Low Light)," 7 Apr. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'undetectable.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of undetectable

1863, in the meaning defined above

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Time Traveler for undetectable

Time Traveler

The first known use of undetectable was in 1863

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Statistics for undetectable

Last Updated

6 Jul 2020

Cite this Entry

“Undetectable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undetectable. Accessed 10 Aug. 2020.

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More Definitions for undetectable


How to pronounce undetectable (audio)

English Language Learners Definition of undetectable

: impossible to discover or notice : not detectable

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