ceremonial >> /ˌsɛrəˈmoʊniəl/
Definition: [noun] The system of rules and procedures to be observed at a formal or religious occasion.
Example: the procedure was conducted with all due ceremonial
Definition: [adjective] Relating to or used for formal events of a religious or public nature.
Example: ceremonial robes
Definition: [adjective] (of a position or role) involving only nominal authority or power.
Example: originally a ceremonial post, it is now a position with executive power