Place of abundance, a place on the east of Jordan and west of
the Euphrates where David gained a great victory over the Syrian
army (2 Sam. 10:16), which was under the command of Shobach.
Some would identify it with Alamatta, near Nicephorium.
Smith's Dictionary
(stronghold), a place east of the Jordan but west of the Euphrates at which the Syrians were collected by Hadarezer, and where David met and defeated them. (2 Samuel 10:16,17)