EAST COUNTRY (אֶ֥רֶץ קֶֽדֶם, land of the front, east). Abraham sent the children of his concubines to this land (Gen 25:6). It lay prob. to the SE of Pal., including part of Arabia. Midian was one of the sons involved.
International Standard Bible Encyclopedia (1915)
Lit. "country of the sunrise" over against the "country of the sunset" (Zec 8:7). The two together form a poetical expression indicating the whole earth.