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.

Sports .

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.

Physics . to cause interference.

to clash; come in collision; be in opposition

The claims of two nations may interfere.

Law . to claim earlier invention when several patent requests for the same invention are being filed. ?

interfere with, Chiefly British . to molest sexually.

adjective

intrusive , meddlesome , obtrusive , officious