Definition: perform duties attached to a particular office or place or function
Usage: His wife officiated as his private secretary
Similar words: serve
Definition: do duty or hold offices; serve in a specific function
Usage: He served as head of the department for three years; She served in Congress for two terms
Definition: act in an official capacity in a ceremony or religious ritual, such as a wedding
Usage: Who officiated at your wedding?
Similar words: perform
Definition: perform a function
Usage: Who will perform the wedding?