unobservable
adjective
un·ob·serv·able
ˌən-əb-ˈzər-və-bəl 
: incapable of being observed : not observable
particles so small that they are unobservable
Examples of unobservable in a Sentence
Recent Examples on the Web
This only gets worse with higher magnification, where even slight wobbles make subjects unobservable.
—
Matt Morris, Space.com, 4 Mar. 2026
These unobservable behaviors may be among the most important for educators.
—Dan Fitzpatrick, Forbes.com, 23 Feb. 2026
But responsibility diffuses across developers, deployers, and users, and interaction loops remain private and unobservable.
—Deb Roy, The Atlantic, 15 Feb. 2026
So, within standard general relativity, Einstein–Rosen bridges are unstable and unobservable.
—Rupendra Brahambhatt, Interesting Engineering, 17 Jan. 2026
Is the theory of the unobservable multiverse science or mere speculation?
—Literary Hub, 19 Nov. 2025
Its nucleus is also far bigger than other notable comets, while its arrival time was fine-tuned to bring it within tens of millions of kilometers from Mars, Venus and Jupiter and be unobservable from Earth at perihelion, along with other unexpected properties.
—Hannah Millington, MSNBC Newsweek, 30 Oct. 2025
Its underlying technologies were developed in the 1990s by the United States Naval Research Laboratory with the aim of providing a safe, unobservable method of communication to American spies.
—Andrei Soldatov, Foreign Affairs, 6 Apr. 2016
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Matt Morris, Space.com, 4 Mar. 2026
These unobservable behaviors may be among the most important for educators.
—Dan Fitzpatrick, Forbes.com, 23 Feb. 2026
But responsibility diffuses across developers, deployers, and users, and interaction loops remain private and unobservable.
—Deb Roy, The Atlantic, 15 Feb. 2026
So, within standard general relativity, Einstein–Rosen bridges are unstable and unobservable.
—Rupendra Brahambhatt, Interesting Engineering, 17 Jan. 2026
Is the theory of the unobservable multiverse science or mere speculation?
—Literary Hub, 19 Nov. 2025
Its nucleus is also far bigger than other notable comets, while its arrival time was fine-tuned to bring it within tens of millions of kilometers from Mars, Venus and Jupiter and be unobservable from Earth at perihelion, along with other unexpected properties.
—Hannah Millington, MSNBC Newsweek, 30 Oct. 2025
Its underlying technologies were developed in the 1990s by the United States Naval Research Laboratory with the aim of providing a safe, unobservable method of communication to American spies.
—Andrei Soldatov, Foreign Affairs, 6 Apr. 2016
Cite this Entry
“Unobservable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unobservable. Accessed 6 Apr. 2026.
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