RAIL
1 —none. 1 level or sloping bar or series of bars: a used to hang things on. B as the top of banisters. C forming part of a fence or barrier as protection. 2 steel bar or continuous line of bars laid on the ground, usually. As a railway. 3 (often attrib.) Railway. —verb. 1 furnish with a rail or rails. 2 (usually. Foll. By in, off) enclose with rails. ? off the rails disorganized; out of order; deranged. [french reille from latin regula *rule]