to come in collision; to be in opposition; to clash; as, interfering claims, or commands.-to enter into, or take a part in, the concerns of others; to intermeddle; to interpose.-to strike one foot against the opposite foot or ankle in using the legs; -- sometimes said of a human being, but usually of a horse; as, the horse interferes.-to act reciprocally, so as to augment, diminish, or otherwise affect one another; -- said of waves, rays of light, heat, etc. see interference, 2.-to cover the same ground; to claim the same invention.