Desert or mountain of the dried-up ground, a general name for the whole mountain range of which Sinai was one of the summits (Ex. 3:1; 17:6; 33:6; Ps. 106:19, etc.). The modern name of the whole range is Jebel Musa. It is a huge mountain block, about 2 miles long by about 1 in breadth, with a very spacious plain at its north-east end, called the Er Rahah, in which the Israelites encamped for nearly a whole year.
Easton’s Bible Dictionary
Horeb
Name meaningdesert; solitude; destruction
Easton’s Bible Dictionary (1897), public domain. Text via Theographic Bible Metadata, CC BY-SA 4.0.