officiate - definition and synonyms

verb [intransitive/transitive] 

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/əˈfɪʃieɪt/
present tense
I/you/we/theyofficiate
he/she/itofficiates
present participleofficiating
past tenseofficiated
past participleofficiated
  1. 2
    to be in charge of a game or competition and check that the players obey the rules
    officiate at:

    She has officiated at every major company event this year.