to come into opposition, as one thing with another, especially with the effect of hampering action or procedure (often followed by with): Constant distractions interfere with work.
2.
to take part in the affairs of others; meddle (often followed by with or in): to interfere in another's life.
3.
(of things) to strike against each other, or one against another, so as to hamper or hinder action; come into physical collision.
4.
to interpose or intervene for a particular purpose.
5.
to strike one foot or leg against another in moving, as a horse.
1440, "to strike against," from M.Fr. enterferer "to strike each other," from entre- "between" + ferir "to strike," from L. ferire "to knock, strike," related to L. forare "to bore, pierce," and cognate with O.E. borian "to bore" (cf. punch (v.), which has both the sense "to hit" and "to make a hole