interference

(noun) a policy of intervening in the affairs of other countries. Synonyms: intervention.

(noun) the act of hindering or obstructing or impeding. Synonyms: hindrance, hinderance.

(noun) electrical or acoustic activity that can disturb communication. Synonyms: noise, disturbance.

(noun) (American football) blocking a player's path with your body. Example: "He ran interference for the quarterback."

(noun) any obstruction that impedes or is burdensome. Synonyms: hindrance, hinderance, hitch, preventive, preventative, encumbrance, incumbrance.