Pronunciation: (äd'n, ād'n),[key] —n. 1. a seaport in and the economic capital of the Republic of Yemen, in the S part: formerly the center of a British colony. 318,000.
2. Colony of. Also called State of Aden. a former British colony on the Gulf of Aden and a member of the former Federation of South Arabia. 75 sq. mi. (194 sq. km).
3. Protectorate of, former name, until 1962, of the former Protectorate of South Arabia.
4. Gulf of, an arm of the Arabian Sea between the E tip of Africa and the Arabian Peninsula.