To interfere is to try to stop something from happening. If you get into a fight on the street, people passing by might try to interfere so no one gets hurt.

Many countries resent it when other countries interfere (get involved) in their internal affairs, just as people often dislike it when others interfere in their personal affairs. In this sense interfere is the opposite of minding one's business. On airplanes you're not allowed to use cellphones because, it's said, they interfere with the plane’s navigational systems.

Definitions of interfere
  1. verb
    get involved, so as to alter or hinder an action, or through force or threat of force
    synonyms: interpose, intervene, step in
    see moresee less
    meddle, tamper
    intrude in other people's affairs or business; interfere unwantedly
    encroach on the rights of others, as in trading without a proper license
    type of:
    act together or towards others or with others
  2. verb
    come between so as to be a hindrance or obstacle
    “Your talking interferes with my work!”
    see moresee less
    type of:
    hinder, impede
    be a hindrance or obstacle to
Word Family

Test prep from the experts

Boost your test score with programs developed by’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.


  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week


  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week


  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week