Definition of ceremonial

• a. - Relating to ceremony, or external rite; ritual; according to the forms of established rites.
• a. - Observant of forms; ceremonious. [In this sense ceremonious is now preferred.]
• n. - A system of rules and ceremonies, enjoined by law, or established by custom, in religious worship, social intercourse, or the courts of princes; outward form.
• n. - The order for rites and forms in the Roman Catholic church, or the book containing the rules prescribed to be observed on solemn occasions.