<p><strong>Noun</strong></p><ul><li>a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels.</li><li>a similar stream of something other than water: a river of ice.</li><li>a river of lava; a river of ice.</li><li>any abundant stream or copious flow; outpouring: rivers of words.</li><li>rivers of tears; rivers of words.</li><li>River, Astronomy: the constellation Eridanus.</li><li>Printing: a vertical channel of white space resulting from the alignment in several lines of spaces between words.</li></ul>