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culvert

A culvert is a drain — but not of the kinds that drain your bathtub or empties your bank account. A culvert is any kind of channel or tunnel that directs unwanted water away from roads and other corridors of travel.

A culvert is typically built underground to prevent inconveniently located streams and rain runoff from flooding roads, highways, streets, and railroads. Culvert can also be used as a verb: if water pools in your driveway and then seeps into the foundation of your house, soaking the brand-new carpet in the basement that you thought you’d just waterproofed, you might wonder why the builders didn’t culvert that underground stream.

Definitions of culvert
  1. noun
    a transverse and totally enclosed drain under a road or railway
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    type of:
    drain, drainpipe, waste pipe
    a pipe through which liquid is carried away
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