in situ
adverb or adjectiveTo save this word, you'll need to log in.
Definition of in situ
: in the natural or original position or place
an in situ cancer confined to the breast duct
Keep scrolling for more
Keep scrolling for more
Test Your Vocabulary
Great Scrabble Words—A Quiz
- Which of the following Q-without-U words means the number five in cards or dice?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
Great Scrabble Words—A Quiz
Words to improve your Scrabble game
Take the quizSemantic Drift Quiz
A challenging quiz of changing words.
Take the quizSpell It
Can you spell these 10 commonly misspelled words?
Take the quizAdd Diction
Build a chain of words by adding one letter at a time.
Play the game
Share in situ
Time Traveler for in situ
The first known use of in situ was in 1740
See more words from the same year