Ambit
Noun.
1. Circuit, compass.
2. The bounds or limits of a place or district.
3. A sphere of action, expression, or influence: scope.
[Origin: Middle English, from Latin ambitus, from ambire.]
(1597)
“And you do not?” Andso said, straightening. The captain was edging into blasphemy, and that, at least, was in the priest’s ambit. “Do you doubt the Bishopry, Captain?” – The God Engines, John Scalzi.