sacrament

A rite believed to be a means of or visible form of grace, especially.

In the Eastern, Roman Catholic, and some other Western Christian churches, any of the traditional seven rites that were instituted by Jesus and recorded in the New Testament and that confer sanctifying grace.

In most other Western Christian churches, the two rites, Baptism and the Eucharist, that were instituted by Jesus to confer sanctifying grace.

A religious rite similar to a Christian sacrament, as in character or meaning.

The Eucharist.

The consecrated elements of the Eucharist, especially the bread or host.

To bind by an oath.

An oath of obedience and fidelity taken by Roman soldiers on enlistment; hence, any oath, solemn engagement, or obligation, or ceremony that binds or imposes obligation.

In theology, an outward and visible sign of inward and spiritual grace; more particularly, a solemn religious ceremony enjoined by Christ, or by the church, for the spiritual benefit of the church or of individual Christians, by which their special relation to him is created or freshly recognized, or their obligations to him are renewed and ratified.