Junction

n.
  1. The act of joining, or the state of being joined; union; combination; coalition; as, the junction of two armies or detachments; the junction of paths.
  2. The place or point of union, meeting, or junction; specifically, the place where two or more lines of railway meet or cross.
    3. Junction plate (Boilers),
    a covering or break-join plate riveted to and uniting the edges of sheets which make a butt joint.
    Junction rails (Railroads),
    the switch, or movable, rails, connecting one line of track with another.