<p><strong>Adjective</strong></p><ul><li>Of, pertaining to, marked by, or favoring reaction, especially extreme conservatism or rightism in politics; opposing political or social change.</li><li>Synonyms: ultraconservative.</li><li>Antonyms: radical.</li></ul><p><strong>Noun</strong></p><ul><li>A reactionary person.</li><li>Synonyms: ultraconservative.</li><li>Antonyms: radical.</li></ul>