early 15c., situacioun, "place, position, or location," from Old French situacion or directly from Medieval Latin situationem (nominative situatio) "a position, situation," noun of action from past-participle stem of situare "to place, locate," from Latin situs "a place, position" (from PIE root *tkei- "to settle, dwell, be home"). Meaning "state of affairs" is from 1710; meaning "employment post" is from 1803.