Ĭn′ter-fēre′, v. i.

[imp. & p. p. INTERFERED; p. pr. & vb. n. INTERFERING.] [Lat. inter, between, and ferire, to strike; O. Fr. entreferir.]

1. To come in collision; to be in opposition; to clash; as, interfering claims, or commands.
2. To enter into or take a part in the concerns of others; to intermeddle; to interpose. “To interfere with party disputes.” Swift.
3. (Far.) To strike one foot against its opposite, so as to break the skin or injure the flesh; as, a horse interferes.
4. (Physics.) To act reciprocally, so as to augment, diminish, or otherwise affect one another;—said of waves, rays of light, heat, and the like. See INTERFERENCE.

Syn.—To interpose; intermeddle. See INTERPOSE.