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Interference is the act of interfering, invading, or poaching.

Interference may also refer to:

Natural sciences and medicine[edit]

Social sciences[edit]

  • Interference theory in psychology, interaction between newly learned material and past learned behavior, memories or thoughts
  • Linguistic interference, language transfer of native language grammar and pronunciation into the learning and use of a second language


  • Interference (chess), when a piece is sacrificially interposed between attacker and defender
  • Interference (ice hockey), the penalty where a player impedes the movement of another player who does not have the puck
  • Interference (baseball), an infraction where a person illegally changes the course of play from what is expected
  • Blocking or interference, a legal move in American football whereby one player obstructs another player's path with his body.
  • Pass interference, a penalty in American football and Canadian Football

Art, literature, and media[edit]


  • Humanitarian interference, a state's use of military force against another state with the intent to end human-rights violations
  • Interference proceeding in United States patent law, a proceeding to determine the priority issues of multiple patent applications

Other uses[edit]

  • Interference, Inc., a guerrilla marketing company based in New York City
  • Interference engine, an engine whose pistons can strike and damage the piston valves when the engine is cranked while the timing belt is broken
  • Interference lithography, a technique for patterning regular arrays of fine features, without the use of complex optical systems or photomasks