<p><strong>Noun</strong></p><ul><li>a boxer or other contestant intermediate in weight between a welterweight and a light heavyweight, especially a professional boxer weighing up to 160 pounds (72.5 kilograms).</li></ul><p><strong>Adjective</strong></p><ul><li>of or relating to middleweights: the middleweight division.</li><li>(of a horse, especially a hunter) able to carry up to 185 pounds (83.9 kilograms).</li></ul>