peninsula of southwestern Asia about 1200 miles (1930 kilometers) long and 1300 miles (2090 kilometers) wide including Saudi Arabia, Oman, Yemen, and the Persian Gulf States; in early times divided intoArabia Pe*traea\pə-ˈtrē-ə\ "Rocky Arabia" (the northwestern part),Arabia De*ser*ta\di-ˈzər-tə\ "Desert Arabia" (the northern part), andArabia Fe*lix\ˈfē-liks\ "Fertile Arabia" (the main part)