Definition
| • | A draining; a gradual flowing off of any liquid; also, that which flows out of a drain. |
| • | The mode in which the waters of a country pass off by its streams and rivers. |
| • | The system of drains and their operation, by which superfluous water is removed from towns, railway beds, mines, and other works. |
| • | Area or district drained; as, the drainage of the Po, the Thames, etc. |
| • | The act, process, or means of drawing off the pus or fluids from a wound, abscess, etc. |