1. Civ. Law.any prohibitory act or decree of a court or an administrative officer.
2. Rom. Cath. Ch.a punishment by which the faithful, remaining in communion with the church, are forbidden certain sacraments and prohibited from participation in certain sacred acts.
3. Roman Law.a general or special order of the Roman praetor forbidding or commanding an act, esp. in cases involving disputed possession.
1. to forbid; prohibit.
2. Eccles.to cut off authoritatively from certain ecclesiastical functions and privileges.
3. to impede by steady bombardment: Constant air attacks interdicted the enemy's advance.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.