- 1 [intransitive, transitive] officiate (at something) officiate something to act as an official in charge of something, especially a sports event A new referee will officiate (at) the game.
- 2[intransitive] officiate (at something) (formal) to do the official duties at a public or religious ceremony He baptized children and officiated at weddings.
NAmE//əˈfɪʃiˌeɪt//Verb Forms present simple I / you / we / they officiate
he / she / it officiates
past simple officiated
-ing form officiating