What is the meaning of Sacrament?

A sacred act and the attendant ceremony, considered an outward sign of divine grace, instituted by Jesus Christ.

The Eucharist.

The consecrated Eucharist (especially the bread).

Anything regarded as possessing a sacred character or mysterious significance.

The oath of allegiance taken by soldiers in Ancient Rome; hence, any sacred ceremony used to impress an obligation; a solemn oath-taking; an oath.

To bind by an oath.

sacrament

sacrament

Source: wiktionary.org