Concise Bible Dictionary:

Province on the east of the Jordan forming part of the ancient kingdom of Bashan, lying to the south of Damascus. The half tribe of Manasseh occupied it. Afterward it became the province, including Ituraea, ruled over by Philip (Luke 3:11Now in the fifteenth year of the reign of Tiberius Caesar, Pontius Pilate being governor of Judea, and Herod being tetrarch of Galilee, and his brother Philip tetrarch of Iturea and of the region of Trachonitis, and Lysanias the tetrarch of Abilene, (Luke 3:1)). It is now called the Hauran. It is a flat and fertile plain, but with little natural supply of water. There are many sites of ruined cities and villages, with houses built of hard stone, some of which are in fairly good repair, but with few inhabitants. It is remarkable for its under-ground dwellings, even forming villages, which are difficult of access. The inhabitants are mostly Druzes and nomadic Arabs. When Israel in a future day are in full possession of Palestine, their territory will reach on the N.E. to the “coast of Hauran” (Ezek. 47:16,1816Hamath, Berothah, Sibraim, which is between the border of Damascus and the border of Hamath; Hazar-hatticon, which is by the coast of Hauran. (Ezekiel 47:16)
18And the east side ye shall measure from Hauran, and from Damascus, and from Gilead, and from the land of Israel by Jordan, from the border unto the east sea. And this is the east side. (Ezekiel 47:18)

Strong’s Dictionary of Hebrew Words:

apparently from 2357 (in the sense of 2352); cavernous; Chavran, a region East of the Jordan
KJV Usage:

Jackson’s Dictionary of Scripture Proper Names:

their whiteness

Potts’ Bible Proper Names:

Very white; cavernous:―a region E. of the Jordan, Ezek. 47:16. {Valde albus}