Or Thelasar, (Isa. 37:12; 2 Kings 19:12), a province in the south-east of Assyria, probably in Babylonia. Some have identified it with Tel Afer, a place in Mesopotamia, some 30 miles from Sinjar.
Easton’s Bible Dictionary
Telassar
Name meaningtaking away; heaping up
Easton’s Bible Dictionary (1897), public domain. Text via Theographic Bible Metadata, CC BY-SA 4.0.