officiate

Plural: officiates

Verb

• act in an official capacity in a ceremony or religious ritual, such as a wedding
  • "Who officiated at your wedding?"
• perform duties attached to a particular office or place or function
  • "His wife officiated as his private secretary"
• To perform the functions of some office.
• To serve as umpire or referee.

Noun

• A person appointed to office

Examples

• He's never officiated a cup-final before.
• She officiated as registrar at the wedding.
• She officiated the wedding as registrar.
• This is the second time he has officiated at a cup-final.

Synonyms

function