noun (n)

• a policy of intervening in the affairs of other countries(noun.communication)

  Synonym:
  intervention
  Antonym:
  noninterference, nonintervention
  

  source: wordnet30
• the act of hindering or obstructing or impeding(noun.act)

  Synonym:
  hinderance, hindrance
  

  source: wordnet30
• electrical or acoustic activity that can disturb communication(noun.event)

  Synonym:
  disturbance, noise
  

  source: wordnet30
• (American football) blocking a player's path with your body(noun.act)

  Example:
  He ran interference for the quarterback.
  

  source: wordnet30
• any obstruction that impedes or is burdensome(noun.artifact)

  Synonym:
  encumbrance, hinderance, hindrance, hitch, incumbrance, preventative, preventive
  

  source: wordnet30
• The act or state of interfering; as, the stoppage of a machine by the interference of some of its parts; a meddlesome interference in the business of others.(noun)

  source: webster1913