(in the Christian Church) a religious ceremony or ritual regarded as imparting divine grace, such as baptism, the Eucharist and (in the Roman Catholic and many Orthodox Churches) penance and the anointing of the sick

(in Roman Catholic use) the consecrated elements of the Eucharist, especially the bread or Host

he heard Mass and received the sacrament

a thing of mysterious and sacred significance; a religious symbol

they used peyote as a sacrament