drainage system
nounUK /ˈdreɪnɪdʒ ˈsɪstəm/
US /ˈdreɪnɪdʒ ˈsɪstəm/
A drainage system is a set of pipes or channels that carry water away.
The town built a new drainage system to stop the streets from flooding.
OTHER MEANINGS
2. The natural network of rivers and streams that removes water from an area of land.
The river basin has a complex natural drainage system.
3. A system of tubes or channels in a building that removes used water.
The house's drainage system was blocked by leaves.
4. In medicine, the way fluids are removed from a wound or body part.
The surgeon checked the drainage system after the operation.