un·​de·​tect·​able ˌən-di-ˈtek-tə-bəl How to pronounce undetectable (audio)
: 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
undetectably adverb
an undetectably small change

Example Sentences

Recent Examples on the Web The mattress pad is also very comfortable because its wires are undetectable. Molly Blanco, Better Homes & Gardens, 12 Apr. 2023 Without adding a tint or shine, the product was almost undetectable, except for the subtle but pleasant tingle, and the feeling of soft lips throughout the day. Rachael Schultz, Health, 12 Apr. 2023 But further testing unveiled that chlorine levels in the problematic units were undetectable, due to a commercial water purification system the hospital had installed in the plumbing lines leading to these units. Jessica Bartlett, BostonGlobe.com, 6 Mar. 2023 Fenty Beauty’s skin tint offers subtle coverage to give a filter effect that is undetectable. Sam Peters, ELLE, 25 Jan. 2023 Unlike conventional hacks, such an attack would be stealthy and virtually undetectable, while cracking one encryption system essentially means cracking them all simultaneously. Arthur Herman, Forbes, 10 Jan. 2023 This product has minuscule levels of THC, which are practically undetectable. Amber Smith, Discover Magazine, 9 Dec. 2022 Another concern is that such findings will create the impression that deepfakes will become completely undetectable, says Wael Abd-Almageed, founding director of the Visual Intelligence and Multimedia Analytics Laboratory at the University of Southern California, who was not involved in the study. Emily Willingham, Scientific American, 14 Feb. 2022 Such treatment, inevitably lifelong, can reduce the virus to undetectable levels in the body, keeping it in check and preventing it from being passed on to others. Robert Hart, Forbes, 16 Mar. 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'undetectable.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1863, in the meaning defined above

Time Traveler
The first known use of undetectable was in 1863

Dictionary Entries Near undetectable

Cite this Entry

“Undetectable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undetectable. Accessed 10 Jun. 2023.

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