waterleaf Syllabification: (wa·ter·leaf)Pronunciation: /ˈwôtərˌlēf, ˈwä-/Definition of waterleaf noun a North American woodland plant with bell-shaped flowers and leaves that appear to be stained with water. Genus Hydrophyllum, family Hydrophyllaceae waterleaf in other Oxford dictionaries Definition of waterleaf in the British & World English dictionary