interference

interference (http://definr.com/interference)

     n 1: a policy of intervening in the affairs of other countries
          [syn: intervention] [ant: nonintervention, nonintervention]
     2: the act of hindering or obstructing or impeding [syn: hindrance]
     3: electrical or acoustic activity that can disturb
        communication [syn: noise, disturbance]
     4: the act of blocking someone's path with your body (as in
        football); "he threw a rolling block into the line backer"
        [syn: blocking, block]
     5: any obstruction that impedes or is burdensome [syn: hindrance,
         hitch, preventive, preventative, encumbrance, incumbrance]