drainage

drainage is a   Noun

Definition:

[1] A draining; a gradual flowing off of any liquid; also, that which flows out of a drain.

[2] The mode in which the waters of a country pass off by its streams and rivers.

[3] The system of drains and their operation, by which superfluous water is removed from towns, railway beds, mines, and other works.

[4] Area or district drained; as, the drainage of the Po, the Thames, etc. Latham.

[5] The act, process, or means of drawing off the pus or fluids from a wound, abscess, etc. Drainage tube (Surg.), a tube introduced into a wound, etc., to draw off the discharges.

Synonyms: