officiate

verb

1 Kathy Dyson officiated at the opening ceremony | he officiated in both World Cups:

preside (over), take charge, be in charge (of), be responsible (for), direct, head (up), manage, oversee, superintend, supervise, conduct, run, lead, chair, take the chair;

umpire, referee, judge, adjudicate, moderate, mediate;

North American, informal emcee.

2 the Pope officiated at a public mass on October 11:

conduct, perform, celebrate, solemnize, concelebrate.