noun
program of a ceremony; order of ceremony
Refers to the printed or announced schedule of events for a formal ceremony, such as a wedding, graduation, or awards ceremony.
結婚式の式次第が配られました。
The program for the wedding ceremony was distributed.
式次第に従って、卒業証書授与が行われた。
The diploma presentation was conducted according to the ceremony program.
次第 alone can mean 'order' or 'circumstances', but 式次第 is a fixed compound meaning 'ceremony program'.
Compound of 式 (ceremony) and 次第 (order, program).