Source : Webster's Revised Unabridged Dictionary (1913)

Forbiddance \For*bid"dance\, n.
   The act of forbidding; prohibition; command or edict against
   a thing. [Obs.]

         ow hast thou yield to transgress The strict
         forbiddance.                             --Milton.

Source : WordNet®

forbiddance
     n 1: an official prohibition or edict against something [syn: {ban},
           {banning}, {forbidding}]
     2: the action of prohibiting or inhibiting or forbidding (or an
        instance thereof); "they were restrained by a prohibition
        in their charter"; "a medical inhibition of alcoholic
        beverages"; "he ignored his parents' forbiddance" [syn: {prohibition},
         {inhibition}]