To declare authoritatively against, as the use or doing of something; debar by forbidding; prohibit peremptorily.To prohibit from some action-or proceeding; restrain by prohibitory injunction; estop; preclude.Specifically Eccles., to cut off from communion with a church; debar from ecclesiastical functions or privileges.Synonyms Prohibit, etc. See forbid.n. An official or authoritative prohibition; a prohibitory order or decree.n. In Roman law, an adjudication, by a solemn ordinance issued by the pretor, in his capacity of governing magistrate, for the purpose of quieting a controversy, usually as to peaceable possession, between private parties. ;n. In the Roman Catholic Church, an ecclesiastical sentence which forbids the right of Christian burial, the use of the sacraments, and the enjoyment of public worship, or the exercise of ecclesiastical functions.n. In Scots law, an injunction. See suspension.n. In law, an incompetent; one judicially declared to be incapable of earing for his person or estate. See interdiction, 2.