<p><strong>Adjective</strong></p><ul><li>of, relating to, or characteristic of a procession.</li><li>of the nature of a procession; moving in an orderly or regular succession, sequence, or the like.</li><li>of a style, design, etc., customarily used in processions: processional regalia.</li><li>sung or played during a procession, as a hymn, march, etc.</li></ul><p><strong>Noun</strong></p><ul><li>a piece of music, as a hymn or slow march, suitable for accompanying a procession.</li><li>a book containing hymns, litanies, etc., for use in religious processions.</li></ul>