Pronunciation: (in sī'tOO, -tyOO, sē'-; Latin.in sit'OO), [key]
1. situated in the original, natural, or existing place or position: The archaeologists were able to date the vase because it was found in situ.
a. in place or position; undisturbed.
b. in a localized state or condition: carcinoma in situ.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.