in si·​tu | \(ˌ)in-ˈsī-(ˌ)tü, -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

Of course, there is an inherent challenge of capturing the in situ acoustics in the first place, since getting audio equipment in and out of caves can be difficult. Jennifer Ouellette, Ars Technica, "Cave acoustics can help sculpt more realistic sounds in digital space," 14 Nov. 2018 Most of the best is made here: take a tour of the Montelobos distillery to sample it in situ, or try it at one of the new local bars. Mark Ellwood, Condé Nast Traveler, "Best Places to Visit in November," 20 Sep. 2018 Still in situ and able to locally -- help locally as discussed, along with your bureau colleagues. Fox News, "Kellyanne Conway talks race relations in America; Sens. Graham and Reed on Space Force and sanctions," 12 Aug. 2018 In addition to gathering surface soil samples, Hayabusa2 will release a German-French rover called MASCOT that will hop across the surface, using its four instruments to analyze soil samples in situ. Dennis Normile, Science | AAAS, "Japan’s new asteroid probe reaches its target after 3.2-billion-kilometer journey," 27 June 2018 The four artists who make up the collective, Wolfgang Gantner, Ali Janka, Florian Reither and Tobias Urban, spent two weeks building up the sculptures in situ in the large contemporary galleries at the Boijmans before the opening on May 19. Nina Siegal, New York Times, "In This Exhibition, You Walk Through Excrement," 7 June 2018 Alas, nothing remains in situ of Fersen’s furnishings and objets d’art, although historic photographs blown up large and displayed in the vaulted drawing room give a sense of its crowded fin de siècle glamour. Hamish Bowles, Vogue, "Exploring Villa Lysis, an Aesthete’s Retreat in Capri," 28 June 2018 Seeing the pieces in situ also ignites imagination. Laura Mauk-caines,, "SF boutique Future Perfect is also its founder’s apartment," 15 June 2018 Lasik — short for laser-assisted in situ keratomileusis — eliminates the need for glasses by reshaping the cornea, the clear round dome that covers the front of the eye. Author: Roni Caryn Rabin, Anchorage Daily News, "Blurred vision, burning eyes: This is a Lasik success?," 12 June 2018

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.

See More

First Known Use of in situ

1740, in the meaning defined above

History and Etymology for in situ

Latin, in position

Keep scrolling for more

Learn More about in situ

Statistics for in situ

Last Updated

10 Dec 2018

Look-up Popularity

Time Traveler for in situ

The first known use of in situ was in 1740

See more words from the same year

Keep scrolling for more

More Definitions for in situ

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

Comments on in situ

What made you want to look up in situ? Please tell us where you read or heard it (including the quote, if possible).


a nest or breeding place

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!