The meaning of Zair in the Bible
(From International Standard Bible Encyclopedia)

za'-ir (tsa'ir; Zeior): When he invaded Edom, we are told that Joram passed over to Zair and all his chariots with him (II Kings 8:21). In the parallel passage (II Chronicles 21:9), "with his captains" ('im sarayw) takes the place of "to Zair" (tsa'irah), probably a copyist's corruption. The place has not been identified. Some have thought that Mt. Seir is intended; others that it means the town of Zoar. Conder suggested ez-Zuweirah, Southeast of the Dead Sea. If Zoar lay in this direction, it is the way by which an invading army might enter Edom.

See more on the meaning of Zair in the Bible:
Zair {Easton's Bible Dictionary}
Zair {Hitchcock's Bible Name}

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