Sacrament

n.	1.	The oath of allegiance taken by Roman soldiers; hence, a sacred ceremony used to impress an obligation; a solemn oath-taking; an oath. I'll take the sacrament on't. - Shak.
	2.	The pledge or token of an oath or solemn covenant; a sacred thing; a mystery. God sometimes sent a light of fire, and pillar of a cloud . . . and the sacrament of a rainbow, to guide his people through their portion of sorrows. - Jer. Taylor.
	3.	(Theol.) One of the solemn religious ordinances enjoined by Christ, the head of the Christian church, to be observed by his followers; hence, specifically, the eucharist; the Lord's Supper.
v. t.	1.	To bind by an oath.

Noun

1.

sacrament - a formal religious act conferring a specific grace on those who receive it; the Protestant sacraments are baptism and the Lord's Supper; in the Roman Catholic Church and the Eastern Orthodox Church there are seven traditional rites accepted as instituted by Jesus: baptism and confirmation and Holy Eucharist and penance and holy orders and matrimony and extreme unction

anointing of the sick, baptism, confirmation, Eucharist, Eucharistic liturgy, extreme unction, Holy Eucharist, holy orders, Holy Sacrament, last rites, Liturgy, Lord's Supper, matrimony, penance, religious ceremony, religious ritual, sacrament of the Eucharist