a narrow republic surrounded by Senegal in West Africa
"The Gambia is a narrow strip of land that forms an enclave completely surrounded by Senegal on all sides except where it meets the Atlantic Ocean."
A river in West Africa.
"The Gambia River winds through the heart of West Africa, serving as a vital waterway for local trade and travel."
The word comes from the name of the Gambia River. It originally referred to the river itself before being used for the country.