Yemen (yem'un) [key], officially Republic of Yemen, republic (2005 est. pop. 20,727,000), 207,300 sq mi (535,800 sq km), SW Asia, at the southern edge of the Arabian peninsula. The present nation of Yemen was formed in 1990, when the Yemen Arab Republic (the former Yemen or Northern Yemen) and the People's Democratic Republic of Yemen (the former Southern Yemen) were unified. Yemen is bordered on the north by Saudi Arabia, on the east by Oman, on the south by the Gulf of Aden, and on the west by the Red Sea. The islands of Kamaran, in the Red Sea, Perim, in the Bab al-Mandeb, and Socotra, in the Arabian Sea, are part of Yemen. Sana is the capital; the port of Aden is the country's commercial capital.
