Boyd’s Bible Dictionary:

(desert). Known in O. T. as “East Country” (Gen. 10:30; 25:6); and “Land of the Sons of the East” (Gen. 29; Judg. 6:3; 7:12). Arabia, from Arab the people (2 Chron. 9:14; Isa. 21:13; Jer. 25:24; Ezek. 27:21). That extensive peninsula lying south of Palestine and between the Red Sea, Indian Ocean, and Persian Gulf. Home of many nomadic races, and in close commerce and even kinship, through Ishmael, with the Hebrews (1 Kings 10:15; 2 Chron. 9:14). Paul visited it (Gal. 1:17). Often referred to by prophets (Isa. 42:11; Jer. 25:24).

Concise Bible Dictionary:

A very large country is embraced by this name, lying south, south-east, and east of Palestine. It was of old, as it is now by the natives, divided into three districts.
1. Arabia Proper, being the same as the ancient Arabia Felix, embraces the peninsula which extends southward to the Arabian Sea and northward to the desert.
2. Western Arabia, the same as the ancient Arabia Petra, embraces Sinai and the desert of Petra, extending from Egypt and the Red Sea to about Petra.
3. Northern Arabia, which joins Western Arabia and extends northward to the Euphrates (1 Kings 10:15; 2 Chron. 9:14; Isa. 21:13; Jer. 25:24; Ezek. 27:21; Gal. 1:17; Gal. 4:25). See ARABIANS.

Strong’s Dictionary of Greek Words:

of Hebrew origin (6152); Arabia, a region of Asia
KJV Usage:

Jackson’s Dictionary of Scripture Proper Names:

dusky: mixed