celebrant

A person who officiates at a religious ceremony, especially a marriage or the Eucharist.

The very reverend celebrant was then conducted to the platform of the altar, and the postulant and her attendants having genuflected, the ceremony of reception began with the preparatory prayers and responseries.

The most appropriate mode of ordering the holy vessels at this part of the service, previously to preparing them for the communion, is for the celebrant to place both the patten and the chalice in the middle of the altar, in a line with himself, the chalice behind and the patten in front; for they are presented before God as one Eucharist.

A person who conducts formal ceremonies in the community, particularly weddings, baby namings, renewals of wedding vows and funerals.

These are celebrants who marry people at registry offices.

Church and state are completely separate but all clergy can be licensed as civil celebrants for legal purposes.

A person who is celebrating something.

1977 February 10, Gerri Major, Gerri Major's Society World: Inaugural Balls Have Largest Black Participation Ever, JET, page 39, Once inside, about all that the celebrants could do was nod their heads to the music and pat their feet.

[…]the celebrants had responded “All hail Satan!” and the girl acolyte had come to the altar and raised her garments to the priest, revealing herself naked beneath them.