i Register
In some senses, officiate is marked as rare. Watch for register when choosing this word.
officiate
UK /əˈfiʃ.i.eɪt/ US /əˈfiʃ.i.eɪt/
verb 2noun 1
Definitions
verb
1
To perform the functions of some office.
She officiated as registrar at the wedding.
She officiated the wedding as registrar.
2
To serve as umpire or referee.
This is the second time he has officiated at a cup-final.
He's never officiated a cup-final before.
noun
1
A person appointed to office, an official.
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