/ Dictionary / Index O officiate: Meaning and Definition of Find definitions for: of•fi•ci•ate Pronunciation: (u-fish'ē-āt"), [key] — v., -at•ed, -at•ing. —v.i. 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. —v.t. 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). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: officiate (Thesaurus) officiary officinal Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language