If you drain something, you remove the liquid from it, usually by pouring it away or allowing it to flow away, and if something drains, liquid flows away or out of it:

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drain implies a gradual withdrawal and ultimate deprivation of what is necessary to an existence.

Drain definition: to withdraw or draw off (a liquid) gradually; remove slowly or by degrees, as by filtration.. See examples of DRAIN used in a sentence.

Most commonly found at the bottom of sinks and bathtubs across the globe, a drain is the hole through which water is carried away.

Want me to drain the lake? The roof must not be quite flat, for a slight fall is necessary in its upper surface to allow water to drain away into gutters placed at convenient points. Such cells are …

To or into the condition of being wasted or lost: All of our best laid plans are down the drain. [Middle English dreinen, to strain, drain, from Old English drēahnian.]

Definition of drain verb in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

If you say that something is a drain on an organization's finances or resources, you mean that it costs the organization a large amount of money, and you do not consider that it is worth it.

Drain (surgery), a tube used to remove pus or other fluids from a wound Drainage, the natural or artificial removal of surface and sub-surface water from a given area