/dray"nij/ , n.
1. the act or process of draining.
2. a system of drains, artificial or natural.
3. See drainage basin .
4. something that is drained off.
5. Surg. the drainage of fluids, as bile, urine, etc., from the body, or of pus and other diseased products from a wound.
[ 1645-55; DRAIN + -AGE ]