ceremonial

Short definition from Wiktionary

Adjective

1. 1
   Of, relating to, consisting of, or used in a ceremony.
2. 2
   Used only for the purpose of ceremony; symbolic.
3. 3
   Synonym of ceremonious (“of a person: fond of ceremony or ritual, or of observing strict etiquette or formality; punctilious”).

Noun

1. 1
   A ceremony, or series of ceremonies, prescribed by ritual.