Emily Dickinson Lexicon

CER-E-MO'NI-AL, a. [See Ceremony.]

1. Relating to ceremony, or external rite; ritual; according to the forms of established rites; as, ceremonial exactness. It is particularly applied to the forms and rites of the Jewish religion; as, the ceremonial law, or worship, as distinguished from the moral and judicial law.
2. Formal; observant of old forms; exact; precise in manners. – Dryden. In this sense, ceremonious is now used.