<p><strong>Noun</strong></p><ul><li>Also called American bison, American buffalo: a North American, oxlike ruminant, <em>Bison bison</em>, having a large head and high, humped shoulders; formerly common in North America, its small remaining population in isolated western areas of the U.S. and Canada is now protected</li><li>Also called wisent: a related animal, <em>Bison bonasus</em>, of Europe, less shaggy and slightly larger than the American bison; now greatly reduced in number</li></ul>