Horion appears 12 times in the New Testament (always plural: horia) as the word for borders, boundaries, or the territory within boundaries. It describes the regions Jesus traveled through (Matthew 8:34; 15:22, 39; 19:1), geographic boundaries of territories, and by extension God's sovereign ordering of human territorial limits. The word derives from horos (boundary marker).
The theology of horion connects to Acts 17:26's declaration that God 'marked out their appointed times in history and the boundaries of their lands' — horothesias, from the same root. National and territorial boundaries are not accidents but expressions of divine providential ordering. Jesus' journeys through various horia in the Gospels trace a ministry that transcends those boundaries — the One who ordained the limits of nations is not Himself limited by them. The Great Commission (Matthew 28:18-20) is the command to cross all horia with the Gospel — no territorial boundary is to remain an obstacle to the Kingdom.