of, pertaining to, or characterized by ceremony; formal; ritual

a ceremonial occasion.

used in or in connection with ceremonies

ceremonial robes.

a system of ceremonies, rites, or formalities prescribed for or observed on any particular occasion; a rite.

Roman Catholic Church .

the order for rites and ceremonies.

a book containing it.

formal behavior found at, or appropriate to, a certain occasion

the ceremonial of a state banquet.

adjective

informal , unceremonial

adjective

august , conventional , imposing , liturgical , lofty , mannered , ritualistic , solemn , stately , studied , stylizednotes:ceremonial is more often applied to things (clothing , etc.) and ceremonious is used for persons and things (occasion , venue) , ceremonious , formal , ritual

noun

liturgy , observance , office , rite , ritual , service