Of, pertaining to, or constituting a sacrament; of the nature of a sacrament; used in the sacrament: as, sacramental rites or elements; sacramental union.Bound or consecrated by a sacrament or oath.In ancient Roman law, of or pertaining to the pledges deposited by the parties to a cause before entering upon litigation.n. A rite analogous to but not included among the recognized sacraments.n. plural Certain instruments or materials used in a sacrament, or ceremonies connected with a sacrament.