'Waterway' definitions:

Definition of 'waterway'

(from WordNet)
noun
A navigable body of water
noun
A conduit through which water flows [syn: watercourse, waterway]

Definition of 'Waterway'

From: GCIDE
  • Waterway \Wa"ter*way`\, n. (Naut.) Heavy plank or timber extending fore and aft the whole length of a vessel's deck at the line of junction with the sides, forming a channel to the scuppers, which are cut through it. In iron vessels the waterway is variously constructed. [1913 Webster]

Synonyms of 'waterway'

From: Moby Thesaurus