a pipe, tube, or the like, for conveying water or other fluid.

a similar natural passage.

Electricity . a structure containing one or more ducts.

Archaic . a fountain.

noun

aqueduct , cable , canal , channel , conductor , course , culvert , duct , flow , flume , gully , gutter , lead-in , lead-out , main , pipe , pipeline , race , sewer , spout , trough , tube , watercourse , conduct , drain , passage , wire