celebrant
noun [ C ] uk/ˈsel.ə.brənt/ us/ˈsel.ə.brənt/
(AT CEREMONY)
主持宗教仪式的神父;仪式主持人
a priest who leads a religious ceremony, or a person who leads a ceremony such as a marriage or a funeral
(AT PARTY)
US参加庆祝活动的人
a person who attends a celebration
They helped clear up after all the celebrants had gone. 当参加庆祝活动的人离开后，他们帮助打扫卫生。