Arabah

plain, in the Revised Version of (2Kings 14:25; Josh 3:16; 8:14; 2Sam 2:29 ; 4:7) (in all these passages the A.V. has "plain"); [(Amos 6:14 ) (A.V. "wilderness")]. This word is found in the Authorized Version only in (Josh 18:18). It denotes the hollow depression through which the Jordan flows from the Lake of Galilee to the Dead Sea. It is now called by the Arabs el-Ghor. But the Ghor is sometimes spoken of as extending 10 miles south of the Dead Sea, and thence to the Gulf of Akabah on the Red Sea is called the Wady el-Arabah.

EBD - Easton's Bible Dictionary