Tram (?), n. [Prov. E. tram a coal wagon, the shaft of a cart or carriage, a beam or bar; probably of Scand, origin; cf. OSw. tråm, trum, a beam, OD. drom, Prov. & OHG. tram.] 1. A four-wheeled truck running on rails, and used in a mine, as for carrying coal or ore.
2. The shaft of a cart. De Quincey.
3. One of the rails of a tramway.
4. A car on a horse railroad.
Tram car, a car made to run on a tramway, especially a street railway car. — Tram plate, a flat piece of iron laid down as a rail. — Tram pot(Milling), the step and support for the lower end of the spindle of a millstone.