To forbid; to prohibit. An act of congress interdicted the sailing of vessels from our ports. Our intercourse with foreign nations was interdicted.

To forbid communion; to cut off from the enjoyment of communion with a church. An archbishop may not only excommunicate and interdict his suffragans, but his vicar-general may do the same.

Prohibition; a prohibiting order or decree.

A papal prohibition by which the clergy are restrained from performing divine service; a species of ecclesiastical censure. The pope has sometimes laid a whole kingdom under an interdict.

A papal prohibition by which persons are restrained from attending divine service, or prevented from enjoying some privilege.