BIND v. 5 definitions
To confine, restrain, or hold by physical force or influence of any kind; as, attraction binds the planets to the sun; frost binds the earth, or the streams. He bindeth the floods from overflowing. Job xxviii. 11. Whom Satan hath bound, lo, these eighteen years. Luke xiii. 16.
BLOCK SYSTEM n.
system by which the track is divided into short sections, as of three or four miles, and trains are so run by the guidance of electric, or combined electric and pneumatic, signals that no train enters a section or block until the preceding train has left it, as in absolute blocking, or that a train may be allowed to f…