Sacraments

Where the word came from:

Derived directly from Latin sacramentum, "a solemn oath, any engagement or ceremony that binds or imposes obligation," specifically "oath of obedience and fidelity taken by Roman soldiers on enlistment; sum which two parties to a suit first deposit," hence, "a cause, a civil suit;"

However, in Church Latin, this word takes on another meaning…"a mystery, a sacrament, something to be kept sacred; the gospel revelation,” which is applicable to what we’re referring.

The definition as given by the Book of Common Prayer:

Outward and visible signs of inward and spiritual grace, given by Christ as sure and certain means for receiving God’s grace. Baptism and Eucharist are the two great sacraments given by Christ to his church. (BCP, pp. 857-858). The Episcopal Church recognizes that five other sacramental rites evolved in the church under the guidance of the Holy Spirit, including Confirmation, Ordination, Holy Matrimony, Reconciliation of a Penitent, and Unction (the anointing of the sick with oil, or the laying on of hands) (BCP, pp. 860-861).