sacrament
noun /ˈsækrəmənt/
  /ˈsækrəmənt/
 in Christianity- [countable] an important religious ceremony such as marriage, baptism or CommunionTopics Religion and festivalsc2
 - the sacrament[singular] the bread and wine that are eaten and drunk during the service of Communion
- to receive the sacrament
 
 
Word OriginMiddle English: from Old French sacrement, from Latin sacramentum ‘solemn oath’ (from sacrare ‘to consecrate’, from sacer ‘sacred’), used in Christian Latin as a translation of Greek mustērion ‘mystery’.