African Gully is a geographical term used to describe a type of terrain found in Africa. It is characterized by deep ravines or gullies, often with steep sides and a dry riverbed at the bottom. The two crossword solutions for this term are WADI (4 letters) and Donga (5 letters). WADI is an Arabic term for a valley or ravine that is usually dry but can become a river during times of heavy rain. A Donga is an Australian term for a shallow gully or depression in the landscape.