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English definition of “drain”

drain

verb     /dreɪn/
[T] to reduce or remove a large amount of something: drain sth from sth The government is enforcing a deal that allows it to drain billions from miners ' pension schemes .drain reserves/resources They took on work that was not profitable , draining cash resources .
[I] to disappear gradually : How can we make sure business does not drain out of the country ? The riches lured in too much competition and profits are now beginning to drain away.
(Definition of drain verb from the Cambridge Business English Dictionary © Cambridge University Press)
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