Pronunciation: (sak"ru-men'tl),[key] —adj. 1. of, pertaining to, or of the nature of a sacrament, esp. the sacrament of the Eucharist.
2. powerfully binding: a sacramental obligation.
—n. Rom. Cath. Ch.an action, as the sign of the cross, a ceremony resembling a sacrament, or a sacred object, regarded as being instituted by the church rather than by Christ and serving as a means of receiving sanctifying grace.