1. A type of semi-permanent dwelling: This is the most common meaning in South Africa and other parts of the world. A donga is a simple, often temporary, structure built from corrugated iron sheets or other readily available materials. It is often used as housing for workers, miners, or those in remote areas.
2. A deep gully or ravine: In Australia, a donga refers to a deep, narrow gorge or gully, often formed by erosion.
3. A slang term for "money" or "wealth": This is less common and mostly used in some regions of South Africa.
To understand the meaning of "donga" in a specific context, you need to consider the location and the surrounding words.