Search Result for "drainage": 
Wordnet 3.0

NOUN (1)

1. emptying something accomplished by allowing liquid to run out of it;
[syn: drain, drainage]

The Collaborative International Dictionary of English v.0.48:

Drainage \Drain"age\, n. 1. A draining; a gradual flowing off of any liquid; also, that which flows out of a drain. [1913 Webster] 2. The mode in which the waters of a country pass off by its streams and rivers. [1913 Webster] 3. (Engin.) The system of drains and their operation, by which superfluous water is removed from towns, railway beds, mines, and other works. [1913 Webster] 4. Area or district drained; as, the drainage of the Po, the Thames, etc. --Latham. [1913 Webster] 5. (Surg.) The act, process, or means of drawing off the pus or fluids from a wound, abscess, etc. [1913 Webster] Drainage tube (Surg.), a tube introduced into a wound, etc., to draw off the discharges. [1913 Webster]
WordNet (r) 3.0 (2006):

drainage n 1: emptying something accomplished by allowing liquid to run out of it [syn: drain, drainage]
Moby Thesaurus II by Grady Ward, 1.0:

64 Moby Thesaurus words for "drainage": air-drying, anhydration, aspiration, bleeding, bloodletting, broaching, cleaning out, clearance, clearing, cupping, defecation, defluxion, dehumidification, dehydration, depletion, desiccation, discharge, discharging cargo, drafting, drain, draining, drawing, drying, drying up, effluence, efflux, effluxion, effusion, egress, elimination, emptying, evacuation, evaporation, excretion, exhalation, exhaust, exhausting, exhaustion, flowoff, gush, insolation, milking, mummification, off-loading, outfall, outflow, outflowing, outpour, outpouring, phlebotomy, pipetting, pumping, removal, runoff, siphoning, sucking, suction, tapping, unloading, venesection, venting, voidance, voiding, withering