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

Other Words from undetectable

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

Examples of undetectable in a Sentence

Recent Examples on the Web Additionally, doctors might not know how effective the surgeries are because sweat glands are very small and often undetectable with instruments. Cathy Cassata, Health.com, 1 Nov. 2021 But the truth is that those undetectable indoor clouds have always carried an unpleasant cargo. Justin Davidson, Curbed, 14 Sep. 2021 This story revolves around a Nigerian video producer who is recruited to make an undetectable deepfake. Wired, 1 Sep. 2021 And a note about hair pieces: There have been many advances in toupees and lace-front hairpieces and wigs that make hiding hair loss easier — and pretty much undetectable. Beth Shapouri, Allure, 31 Aug. 2021 When someone living with HIV receives effective treatment and follows regimens prescribed by their doctor, HIV becomes undetectable when tested. Jem Aswad, Variety, 31 Aug. 2021 With the right medications, people living with HIV can have undetectable viral loads with the virus, therefore being effectively untransmittable. Quinn Tivey, PEOPLE.com, 30 June 2021 The Reaper’s makers, General Atomics Aeronautical Systems (GA-ASI), have developed an Airborne Laser Communications System providing unjammable, undetectable communication with satellites via an laser link – like fiber optic with the cable. David Hambling, Forbes, 26 May 2021 On flat ground, the motor’s boost can be undetectable, but on a steep hill, the help can make a big difference. BostonGlobe.com, 22 Oct. 2021

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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The first known use of undetectable was in 1863

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Last Updated

16 Nov 2021

Cite this Entry

“Undetectable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undetectable. Accessed 2 Dec. 2021.

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English Language Learners Definition of undetectable

: impossible to discover or notice : not detectable

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