ceremonial
adj
of, used for or involving a ceremony; formal 礼仪的; 仪式的; 正式的: ceremonial dress 礼服
a ceremonial occasion 正式场合. ceremonial, n [C, U]
system of rules and procedures for ceremonies or formal occasions 礼仪; 仪式
the ceremonials of religion 宗教仪式
performed with due ceremonial 按照适当礼仪进行.