unobserved

adjective

un·​ob·​served ˌən-əb-ˈzərvd How to pronounce unobserved (audio)
: not noticed or perceived : not observed
The two vessels slipped out of Plymouth, unobserved by Spanish spies …Samuel Eliot Morison
A welcoming place is almost by definition someplace out of sight, someplace private and unobserved.Jane Kramer

Examples of unobserved in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
On this day, the astronauts took the opportunity to name one previously unobserved crater after Reid Wiseman's late wife Carroll, and another after their Orion spacecraft, Integrity. Anthony Wood, Space.com, 13 Apr. 2026 And in a place this small, nothing goes unobserved. The Sports Desk, NBC news, 5 Feb. 2026 According to the Cleveland Clinic, one in 2,500 pregnancies goes unobserved until labor. Sam Gillette, PEOPLE, 29 Jan. 2026 The equation says how the wave function evolves over time but only while the system is left unobserved. Joseph Howlett, Scientific American, 27 Jan. 2026 See All Example Sentences for unobserved

Word History

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of unobserved was in the 15th century

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Cite this Entry

“Unobserved.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unobserved. Accessed 28 Apr. 2026.

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