drainage
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Learner's definition of DRAINAGE
[noncount]
:
the act or process of draining something
:
the act or process of removing water or liquid from a place or thing
— often used before another noun
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the drainage of swamps
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The soil has good drainage. [=extra water does not stay in the soil]
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The holes in the bottom of the flower pot are for drainage. [=are for the extra water to flow out]
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a drainage system/basin/ditch/channel
