verb (used without object), of·fi·ci·at·ed, of·fi·ci·at·ing.
- to perform the office of a member of the clergy, as at a divine service.
- to perform the duties or function of some office or position.
- to serve as referee, umpire, or other official in a sports contest or game.
verb (used with object), of·fi·ci·at·ed, of·fi·ci·at·ing.
- to serve as the priest or minister of (a divine service, religious ceremony, etc.).
- to perform, carry out, or fulfill (an official duty or function).
- to act as a referee, umpire, timekeeper, or other official for (a sports contest or game).
- to hold the position, responsibility, or function of an official
- to conduct a religious or other ceremony
v.1630s, “to perform a duty,” especially “to perform the duty of a priest,” from Medieval Latin officiatum, from present participle of officiare “perform religious services,” from Latin officium (see office). Related: Officiated; officiating.