A frontier is a boundary or outer limit. The biblical word occurs in Ezekiel in the plural, with the sense of borders or surrounding quarters.
Definition
Frontier means a boundary, border, or outer limit. In the biblical occurrence, the term appears in the plural and refers to surrounding quarters or bordering districts.
Biblical Usage
The word occurs in Ezekiel in a description that the Revised Version margin explains as “in every quarter.”
Historical Bible Dictionaries
International Standard Bible Encyclopedia (ISBE)
<p>fron'-ter, frun'ter (katseh): The word occurs once in plural in Eze 25:9. the Revised Version, margin has "in every quarter."</p>