INTERDICT', L. interdico, interdictum inter and dico, to speak.

1. To forbid to prohibit. An act of congress interdicted the sailing of vessels from our ports. Our intercourse with foreign nations was interdicted.
2. 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.