- a kingdom in N and central Arabia, including Hejaz, Nejd, and dependencies. About 600,000 sq. mi. (1,554,000 sq. km). Capital: Riyadh.
- a kingdom in SW Asia, occupying most of the Arabian peninsula between the Persian Gulf and the Red Sea: founded in 1932 by Ibn Saud, who united Hejaz and Nejd; consists mostly of desert plateau; large reserves of petroleum and natural gas. Official language: Arabic. Official religion: (Sunni) Muslim. Currency: riyal. Capital: Riyadh (royal and administrative), Jiddah (diplomatic). Pop: 26 939 583 (2013 est). Area: 2 260 353 sq km (872 722 sq miles)
Monarchy occupying most of the Arabian Peninsula, where it is bordered by Jordan, Iraq, and Kuwait to the north; the Persian Gulf, Qatar, and the United Arab Emirates to the east; Oman to the east and south; Yemen to the south; and the Red Sea and the Gulf of Aqaba to the west. Its capital and largest city is Riyadh.