<p><strong>Verb:</strong></p><ul><li>(Used with object)<ul><li>To crossbreed (a plant or animal).</li><li>To cause to breed together.</li></ul></li></ul><p><strong>Verb:</strong></p><ul><li>(Used without object)<ul><li>To crossbreed.</li><li>To breed or mate with a closely related individual, as in a small, closed population.</li></ul></li></ul>