country on the W coast of Africa, surrounded on three sides by Senegal: formerly a British colony & protectorate, it became independent (1965) & a member of the Commonwealth: 4,361 sq mi (11,295 sq km); pop. 1,026,000; cap. Banjul
: official name The Gambia
2.
river in W Africa, flowing from N Guinea, through Senegal & Gambia, into the Atlantic: c. 700 mi (1,127 km)