spillway

English Thesaurus

1. a channel that carries excess water over or around a dam or other obstruction (noun.artifact)

hypernym	:	conduit,
definition	:	a passage (a pipe or tunnel) through which water or electric wires can pass (noun.artifact)

derivation	:	slop, spill, splatter,
definition	:	cause or allow (a liquid substance) to run or flow from a container (verb.contact)

derivation	:	slop, spill, splatter,
definition	:	cause or allow (a liquid substance) to run or flow from a container (verb.contact)