Longman Dictionary of Contemporary English homepage

interference

noun
     
in‧ter‧fer‧ence [uncountable]
1 an act of interfering
interference in
I resent his interference in my work.
Industrial relations should be free from state interference.
2TCBAMT unwanted noise on the radio, television, or on the telephone, or faults in the television picture
3 especially American EnglishDS the act of blocking or touching another player in a sports game, for example by standing in front of them or holding on to them, when you are not supposed to [= obstruction British English]
4

run interference

American English
a) DSA to protect a player who has the ball in American football by blocking players from the opposing team
b) to help someone to achieve something by dealing with people or problems that might cause them trouble

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