Boyd’s Bible Dictionary:
(fortress). An unlocated eastern country (2 Kings 16:9; Amos 9:7).
Concise Bible Dictionary:
A country from which the Syrians had come, and to which they were carried from Damascus by the Assyrians (2 Kings 16:9; Isa. 22:6; Amos 1:5; Amos 9:7). Being associated with Elam in Isaiah it is supposed to be in Lower Mesopotamia.
Strong’s Dictionary of Hebrew Words:
Meaning:
the same as 7023; fortress; Kir, a place in Assyrian; also one in Moab
Jackson’s Dictionary of Scripture Proper Names:
a wall
Potts’ Bible Proper Names:
Town; a walled place; fortress:―name of two places, Amos 9:7. {Oppidum}