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1. Flow off gradually
   "The rain water drains into this big vat"
   - run out
    
2. Deplete of resources
   "The exercise class drains me of energy"
    
3. Empty of liquid; drain the liquid from
   "We drained the oil tank"
    
4. Make weak
   "Life in the camp drained him"
   - enfeeble, debilitate

1. Emptying something accomplished by allowing liquid to run out of it
   - drainage
    
2. Tube inserted into a body cavity (as during surgery) to remove unwanted material
    
3. A pipe through which liquid is carried away
   - drainpipe, waste pipe
    
4. A gradual depletion of energy or resources
   "a drain on resources"; "a drain of young talent by emigration"

Derived forms: draining, drained, drains

Type of: consume, course, deplete, depletion, eat, eat up, empty, emptying, evacuation, exhaust, feed, flow, pipage, pipe, piping, run, run through, tube, tubing, use up, voidance, weaken, wipe out

Encyclopedia: Drain, Maine-et-Loire Drain Drain, OR Drain, Oregon Drain, Or