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English definition of “dam”

dam

noun [C]  /dæm/ us  
a wall built across a river to stop the flow and collect the water, esp. to make a reservoir (= an artificial lake) that provides water for an area or can be used to make electricity

dam

verb [T]  /dæm/ (-mm-) us  
to build a dam across a river in order to store the water: [M] Fish are affected when a river is dammed up.
(Definition of dam from the Cambridge Academic Content Dictionary © Cambridge University Press)
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