officiate

1 ENTRIES FOUND:
officiate /əˈfɪʃiˌeɪt/ verb
officiates; officiated; officiating
officiate
/əˈfɪʃiˌeɪt/
verb
officiates; officiated; officiating
Britannica Dictionary definition of OFFICIATE
1 
formal : to perform the official duties of a ceremony
[no object]
— usually + at
[+ object]
2 
sports : to be a referee, umpire, or judge at a game, tournament, etc.
[no object]
— usually + at
[+ object]