Rāil1, n.
[L. Ger. & Sw. regel, N. H. Ger. riegel, a rail, bar, or bolt; O. H. Ger. rigil, rigel, bar, bolt; D. rigchel, Lat. regula.]
Sense 1. A piece of timber, or of iron, or other metal, extending from one post or support to another, as in fences, balustrades, staircases, &c.
Sense 2. The horizontal part in any piece of framing or paneling.
Sense 3. (Railways.) A bar of iron, forming the upper part of the superstructure on which the wheels of vehicles roll. It is usually shaped with reference to vertical strength, and is held in place by chairs, splices, &c.
Sense 4. (Naut.) (a.) A narrow plank nailed for ornament or security on a ship's upper works. (b.) A curved piece of timber extending from the bows of a ship to the continuation of its stem, to support the knee of the head, &c.
By rail, by railroad or railway; as, to travel by rail.

