<p><strong>Verb:</strong></p><ul><li>(used with or without object)<ul><li>to turn hastily; flutter and shift: to riffle a stack of letters; to riffle through a book.</li><li>Cards: to shuffle by dividing the deck in two, raising the corners slightly, and allowing them to fall alternately together.</li><li>to cause or become a riffle.</li></ul></li></ul><p><strong>Noun:</strong></p><ul><li>a rapid, as in a stream.</li><li>a ripple, as upon the surface of water.</li><li>Mining: the lining of transverse bars or slats on the bed of a sluice, arranged so as to catch heavy minerals, as gold or platinum.</li><li>a hopper for distributing bulk material.</li><li>the act or method of riffling cards.</li></ul>