To officiate is to preside over something, to perform a ceremony, or to be in charge of something.(verb)
See officiate in Webster's New World College Dictionary
See officiate in American Heritage Dictionary 4
verb of·fi·ci·at·ed, of·fi·ci·at·ing, of·fi·ci·ates verb, intransitive
Origin: Medieval Latin officiāre, officiāt-, to conduct
Origin: , from Latin officium, service, duty; see Office.
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