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Definition of: officiate
(ə·fish′ē·āt) v.i. ·at·ed, ·at·ing
1. To act or serve as a priest or minister; conduct a service.
2. To perform the duties or functions of an office.
3. In sports, to act as a referee, umpire, etc. [<Med. L officiatus, pp. of officiare perform divine service <L officium OFFICE]
—of·fi′ci·a′tion noun
—of·fi′·ci·a′tor noun
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