Pronunciation: (drān), [key]
1. to withdraw or draw off (a liquid) gradually; remove slowly or by degrees, as by filtration: to drain oil from a crankcase.
2. to withdraw liquid gradually from; make empty or dry by drawing off liquid: to drain a crankcase.
3. to exhaust the resources of: to drain the treasury.
4. to deprive of strength; tire.

1. to flow off gradually.
2. to become empty or dry by the gradual flowing off of liquid or moisture: This land drains into the Mississippi.

1. something, as a pipe or conduit, by which a liquid drains.
2. Surg.a material or appliance for maintaining the opening of a wound to permit free exit of fluids.
3. gradual or continuous outflow, withdrawal, or expenditure.
4. something that causes a large or continuous outflow, expenditure, or depletion: Medical expenses were a major drain on his bank account.
5. an act of draining.
6. Physical Geog.
a. an artificial watercourse, as a ditch or trench.
b. a natural watercourse modified to increase its flow of water.
7. go down the drain,
a. to become worthless or profitless.
b. to go out of existence; disappear.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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