Definitions for "Officiant"
The officer who officiates or performs an office, as the burial office.
The cleric or city official who performs the marriage ceremony. Examples include a priest, a rabbi, a minister, or a justice of the peace.
a clergyman who officiates at a religious ceremony or service
Keywords:  clergy, rites, daily, church, lay
A person who officiates at the Daily Offices and other rites.
The person who leads the Daily Office or another church service. The term may indicate a member of the clergy or a lay person.