waterway Syllabification: (wa·ter·way)Pronunciation: /ˈwôtərˌwā, ˈwä-/Translate waterway | into French | into German | into Italian | into Spanish Definition of waterway noun 1a river, canal, or other route for travel by water. 2a thick plank or angle iron at the outer edge of the deck of a vessel, which joins the vessel’s side to its deck and directs water overboard via the scuppers. waterway in other Oxford dictionaries Definition of waterway in the British & World English dictionary