drainage

(drānij)

noun

  1. the act, process, or method of draining
  2. a system of drains; arrangement of pipes, etc. for carrying off waste matter
  3. that which is drained off
  4. a region or area drained, as by a river

See drainage in American Heritage Dictionary 4

noun
  1. The action or a method of draining.
  2. A system of drains.
  3. Something that is drained off.
  4. Medicine The removal of fluid or purulent material from a wound or body cavity.

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