in situ

adverb or adjective
in si·​tu | \ (ˌ)in-ˈsī-(ˌ)tü How to pronounce in situ (audio) , -ˈsi-, -(ˌ)tyü also -ˈsē-, -(ˌ)chü \

Definition of in situ

: in the natural or original position or place an in situ cancer confined to the breast duct

Examples of in situ in a Sentence

Recent Examples on the Web But that doesn't give scientists much insight into how the structure works in situ. Grace Huckins, Wired, 12 Aug. 2021 In this case, the tactical response is positioned in situ supported by the operational emergency coordination which typically gathers off-site. Edward Segal, Forbes, 7 June 2021 Heat-resistant electronics that can resist the Venusian inferno are being developed for in situ exploration, but nothing yet exists that could give a surface mission more than a couple of hours of survivability. Robin George Andrews, Scientific American, 2 June 2021 Abigail Perez was diagnosed with melanoma in situ, or stage zero melanoma, in 2019. Magdalene Taylor, Allure, 26 May 2021 Academicians and regulators who want such treasures placed in museums, or preserved in situ, have a profound distaste for someone profiting from a discovery. Kim Kavin, Robb Report, 25 Apr. 2021 According to McClure, the best way to test this technology in situ would be to send a lander equipped with four 10 kilowatt-generating reactors to the Martian surface. Jennifer Leman, Popular Mechanics, 28 Mar. 2021 Vitelli emphasizes she’s keen for more owners to visit her in situ and see their vessels under construction rather than simply deeding responsibility for project management to their brokers. Mark Ellwood, Robb Report, 11 Apr. 2021 In the United States, the Brooklyn Museum and San Francisco’s Asian Art Museum both acquired panels in the 1980s that the Italians had photographed in situ. New York Times, 4 Mar. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'in situ.' 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 in situ

1740, in the meaning defined above

History and Etymology for in situ

Latin, in position

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Time Traveler for in situ

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The first known use of in situ was in 1740

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Last Updated

1 Sep 2021

Cite this Entry

“In situ.” Dictionary, Merriam-Webster, Accessed 24 Sep. 2021.

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More Definitions for in situ

in situ

adverb or adjective
in si·​tu | \ (ˈ)in-ˈsī-(ˌ)t(y)ü, -ˈsi- also -ˈsē-, -(ˌ)chü \

Medical Definition of in situ

: in the natural or original position or place an in situ cancer confined to the breast duct — see carcinoma in situ


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