the slopes bordering a river.
noun 1. a high-climbing vine, Vitis riparia, of eastern North America, having fragrant flowers and nearly black fruit.
noun, Physical Geography. 1. the area of land drained by a river and its branches. river basin The land area that is drained by a river and its tributaries. The Mississippi River basin, for example, is a vast area that covers much of the central United States from the central ranges of the Appalachian Mountains […]
noun 1. the channel in which a river flows or formerly flowed.
noun 1. a tree, Betula nigra, of the eastern U.S., having papery, reddish-brown bark that peels away.