Ceremonie, what is it?

A ceremony is an event of ritual significance, performed on a special occasion.

Ceremonies may have a physical display or theatrical component: dance, a procession, the laying on of hands. A declaratory verbal pronouncement may explain or cap the occasion, for instance:

• I now pronounce you husband and wife.
• I swear to serve and defend the nation ...
• I declare open the games of ...
• I/We dedicate this ... ... to ...

Both physical and verbal components of a ceremony may become part of a liturgy.