in situ

adverb or adjective

in si·​tu (ˌ)in-ˈsī-(ˌ)tü 

-ˈsi-,

-(ˌ)tyü 

 also  -ˈsē-,

-(ˌ)chü 

: 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

The device is a fast way to charge a phone in situ and is available in black and white. —Mark Sparrow, Forbes, 6 Sep. 2024

Nicole Kidman has been out in full force at the Venice Film Festival, her blonde bombshell hair and luminous complexion firmly in situ. —Hannah Coates, Vogue, 3 Sep. 2024

Once it was photographed in situ, the fossil was covered in a protective plaster jacket to stabilize it during its removal, MDEQ said. —Meredith Deliso, ABC News, 13 Aug. 2024

People with nearsightedness or farsightedness may also qualify for refractive surgery, such as laser in situ keratomileusis (LASIK) or photorefractive keratectomy (PRK). —Lindsay Curtis, Health, 18 Aug. 2024

Word History

Etymology

Latin, in position

First Known Use

1740, in the meaning defined above

Kids Definition

in situ

adverb or adjective

in si·​tu (ˈ)in-ˈsī-t(y)ü 

-ˈsi-

: in the natural or original position

the cancer cells remained in situ

Etymology

Latin, "in position"

Medical Definition

in situ

adverb or adjective

in si·​tu

(ˈ)in-ˈsī-(ˌ)t(y)ü, -ˈsi- also -ˈsē-, -(ˌ)chü

: in the natural or original position or place

an in situ cancer confined to the breast duct

see carcinoma in situ