Definition of culvert noun from the Oxford Advanced Learner's Dictionary

 

culvert

 noun
noun
BrE BrE//ˈkʌlvət//
 
; NAmE NAmE//ˈkʌlvərt//
 
Rivers and lakes
 
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a tunnel that carries a river or a pipe for water under a road Diameter culverts ran the entire length of the building. The culvert seemed to be disused and silted up with debris. See related entries: Rivers and lakes Word Origin late 18th cent.: of unknown origin.
See the Oxford Advanced American Dictionary entry: culvert