to come into opposition, as one thing with another, esp. with the effect of hampering action or procedure (often fol. by with): Constant distractions interfere with work.
to take part in the affairs of others; meddle (often fol. by with or in): to interfere in another's life.
(of things) to strike against each other, or one against another, so as to hamper or hinder action; come into physical collision.
to interpose or intervene for a particular purpose.
to strike one foot or leg against another in moving, as a horse.
to obstruct the action of an opposing player in a way barred by the rules.
Football.to run interference for a teammate carrying the ball.
to cause interference.
to clash; come in collision; be in opposition: The claims of two nations may interfere.
to claim earlier invention when several patent requests for the same invention are being filed.