Definition of in situ in English:

in situ

adverb & adjective

  • 1In its original place.

    [as adverb] ‘mosaics and frescoes have been left in situ’
    [as adjective] ‘a collection of in situ pumping engines’
    • ‘The archaeologists were able to date the vase because it was found in situ.’
    • ‘Her mission is preserving populations of native rock grape plants in situ, on site in their native habitat, as part of an ecological preserve.’
    in position, in situ
    in position, in situ
    View synonyms
    1. 1.1In position.
      [as adverb] ‘her guests were all in situ’
      • ‘These facilities are now in situ with a planned operational date in October.’

Origin

Mid 18th century: Latin.

Pronunciation:

in situ

/ˌin ˈsīto͞o//ˌin ˈsēto͞o/