noun (n)

• an official prohibition or edict against something(noun.communication)

  Synonym:
  ban, banning, forbidding
  

  source: wordnet30
• the action of prohibiting or inhibiting or forbidding (or an instance thereof)(noun.act)

  Example:
  He ignored his parents' forbiddance.
  

  Synonym:
  inhibition, prohibition
  

  source: wordnet30
• The act of forbidding; prohibition; command or edict against a thing.(noun)

  source: webster1913