The oath of allegiance taken by Roman soldiers; hence, a sacred ceremony used to impress an obligation; a solemn oath-taking; an oath. [Obs.] I'll take the sacrament on't. Shak.
The pledge or token of an oath or solemn cobenant; a sacred thing; a mystery. [Obs.] 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.
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.
To bind by an oath. [Obs.] Laud.
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