What is Drain?

Drain definition and meaning on Dictionary terms:
verb (used with object)
to withdraw or draw off (a liquid) gradually; remove slowly or by degrees, as by filtration: to drain oil from a crankcase.
to withdraw liquid gradually from; make empty or dry by drawing off liquid: to drain a crankcase.

to exhaust the resources of: to drain the treasury.
to deprive of strength; tire.

verb (used without object)
to flow off gradually.
to become empty or dry by the gradual flowing off of liquid or moisture: This land drains into the Mississippi.

something, as a pipe or conduit, by which a liquid drains.
Surgery. a material or appliance for maintaining the opening of a wound to permit free exit of fluids.

gradual or continuous outflow, withdrawal, or expenditure.
something that causes a large or continuous outflow, expenditure, or depletion: Medical expenses were a major drain on his bank account.
an act of draining.
Physical Geography. an artificial watercourse, as a ditch or trench. a natural watercourse modified to increase its flow of water.


reference: https://www.dictionary.com/browse/drain