interdict

from The American Heritage® Dictionary of the English Language, 5th Edition.

• transitive verb To prohibit (an action or thing) or forbid (someone) to do something, especially by legal or ecclesiastical order.
• transitive verb To cut or destroy (a line of communication) by firepower so as to halt an enemy's advance.
• transitive verb To confront and halt the activities, advance, or entry of.
• noun An authoritative prohibition, especially by court order.
• noun Roman Catholic Church An ecclesiastical censure that bars an individual, members of a given group, or inhabitants of a given district from participation in most sacraments.

from The Century Dictionary.

• 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.
• noun In law, an incompetent; one judicially declared to be incapable of earing for his person or estate. See interdiction, 2.
• noun An official or authoritative prohibition; a prohibitory order or decree.
• noun 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. ;
• noun 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.
• noun In Scots law, an injunction. See suspension.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To forbid; to prohibit or debar.
• transitive verb (Eccl.) To lay under an interdict; to cut off from the enjoyment of religious privileges, as a city, a church, an individual.
• noun A prohibitory order or decree; a prohibition.
• noun (R. C. Ch.) A prohibition of the pope, by which the clergy or laymen are restrained from performing, or from attending, divine service, or from administering the offices or enjoying the privileges of the church.
• noun (Scots Law) An order of the court of session, having the like purpose and effect with a writ of injunction out of chancery in England and America.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A papal decree prohibiting the administration of the sacraments from a political entity under the power of a single person (e.g., a king or an oligarchy with similar powers). Exteme unction/Anointing of the sick are excepted.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb destroy by firepower, such as an enemy's line of communication
• noun a court order prohibiting a party from doing a certain activity
• verb command against
• noun an ecclesiastical censure by the Roman Catholic Church withdrawing certain sacraments and Christian burial from a person or all persons in a particular district