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English definition of “sewer”

sewer

noun [C]  /ˈsu·ər/
an artificial passage or pipe , usually underground , that carries waste and used water from sinks and toilets away from buildings to a place where they can be safely gotten rid of: The county is putting in new sewers.
(Definition of sewer noun from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definitions of “sewer” in other dictionaries

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