What is the meaning of officiating?

noun

• The act of umpiring.
  • usage: "the officiating was excellent"
  • synonyms: umpirage, officiation, refereeing

verb

• Act in an official capacity in a ceremony or religious ritual, such as a wedding.
  • usage: "Who officiated at your wedding"
  • synonyms: officiate
• Perform duties attached to a particular office or place or function.
  • usage: "His wife officiated as his private secretary"
  • synonyms: officiate, function