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.
Easton’s Bible Dictionary
Helam
Name meaningtheir army; their trouble
Easton’s Bible Dictionary (1897), public domain. Text via Theographic Bible Metadata, CC BY-SA 4.0.