<p><strong>Verb (used with object)</strong></p><ul><li>to make dark or darker</li><li>to make obscure</li><li>to make less white or clear in color</li><li>to make gloomy; sadden</li><li>to make blind</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to become dark or darker</li><li>to become obscure</li><li>to become less white or clear in color</li><li>to grow clouded, as with gloom or anger</li><li>to become blind</li></ul>