Merriam-Webster Online Dictionary
sacrament (noun)1.
a) a Christian rite (as baptism or the Eucharist) that is believed to have been ordained by Christ and that is held to be a means of divine grace or to be a sign or symbol of a spiritual reality
b) a religious rite or observance comparable to a Christian sacrament
2.
capitalized
a) - communion
b) - blessed sacrament
3.
something likened to a religious sacrament - saw voting as a sacrament of democracy