The Collaborative International Dictionary of English v.0.48:

Interdiction \In`ter*dic"tion\, n. [L. interdictio: cf. F.
   interdiction.]
   The act of interdicting; prohibition; prohibiting decree;
   curse; interdict.
   [1913 Webster]

         The truest issue of thy throne
         By his own interdiction stands accurst.  --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

interdiction
    n 1: authoritative prohibition
    2: a court order prohibiting a party from doing a certain
       activity [syn: interdict, interdiction]