A person who officiates at a religious ceremony, especially a marriage or the Eucharist.
A person who is celebrating something.
A person who conducts formal ceremonies in the community, particularly weddings, baby namings, renewals of wedding vows and funerals.
A member of a religious body who is (often, although not always, of the clergy) officially assigned to provide pastoral care at an institution, group, private chapel, etc.
A person without religious affiliation who carries out similar duties in a secular context.