officiate
verb
of·fi·ci·ate ə-ˈfi-shē-ˌāt 
officiated; officiating
intransitive verb
1
: to perform a ceremony, function, or duty
officiate at a wedding
2
: to act in an official capacity : act as an official (as at a sports contest)
transitive verb
1
: to carry out (an official duty or function)
2
: to serve as a leader or celebrant of (a ceremony)
3
: to administer the rules of (a game or sport) especially as a referee or umpire
officiation
ə-ˌfi-shē-ˈā-shən
noun 
Example Sentences
The bishop officiated the memorial Mass. Two referees officiated the hockey game.
Recent Examples on the Web Four officials is the minimum needed to officiate a football game, Fromeyer said. 
James Weber, The Enquirer, 16 Sep. 2022 Most people who officiate youth and high school sports do it for the love of the game. The Arizona Republic, 26 Aug. 2022 One of the pastors from our church will officiate the ceremony, so at least some people from work will be there. Amy Dickinson, Chicago Tribune, 21 Aug. 2022 Many have full-time jobs and make time to officiate games in the evening and on weekends. New York Times, 21 Apr. 2022 Rodriguez chose her Jane the Virgin costar to officiate her special day in May 2019. Grace Gavilanes, Peoplemag, 23 Aug. 2022 Monty McCutcheon said the rule will be a challenge to officiate early when players attempt to challenge officials to make such an unprecedented call. Gary Washburn, BostonGlobe.com, 6 Aug. 2022 In many of the book’s anecdotes, people approach the Grammar Table in groups, calling on Jovin to officiate a dispute. Dennis Duncan, Washington Post, 26 July 2022 Javie was chosen to officiate 15 N.B.A. finals, an assignment typically reserved for referees with the highest grades for accuracy during the regular season and playoffs. New York Times, 20 May 2022 See More
James Weber, The Enquirer, 16 Sep. 2022 Most people who officiate youth and high school sports do it for the love of the game. The Arizona Republic, 26 Aug. 2022 One of the pastors from our church will officiate the ceremony, so at least some people from work will be there. Amy Dickinson, Chicago Tribune, 21 Aug. 2022 Many have full-time jobs and make time to officiate games in the evening and on weekends. New York Times, 21 Apr. 2022 Rodriguez chose her Jane the Virgin costar to officiate her special day in May 2019. Grace Gavilanes, Peoplemag, 23 Aug. 2022 Monty McCutcheon said the rule will be a challenge to officiate early when players attempt to challenge officials to make such an unprecedented call. Gary Washburn, BostonGlobe.com, 6 Aug. 2022 In many of the book’s anecdotes, people approach the Grammar Table in groups, calling on Jovin to officiate a dispute. Dennis Duncan, Washington Post, 26 July 2022 Javie was chosen to officiate 15 N.B.A. finals, an assignment typically reserved for referees with the highest grades for accuracy during the regular season and playoffs. New York Times, 20 May 2022 See More Word History
Etymology
borrowed from Medieval Latin officiātus, past participle of officiāre "to perform a function, perform priestly duties," going back to Late Latin officiārī "to perform a function," derivative of Latin officium "duty, office"
First Known Use
1623, in the meaning defined at intransitive sense 1
Kids Definition
officiate
verb
of·fi·ci·ate ə-ˈfi-shē-ˌāt
officiated; officiating
1
: to perform a ceremony or duty
A bishop officiated at the wedding.
2
: to act as an officer : preside
She officiated at the annual meeting.