Tram \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. tr[*a]m, 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. [1913 Webster] 2. The shaft of a cart. [Prov. Eng.] --De Quincey. [1913 Webster] 3. One of the rails of a tramway. [1913 Webster] 4. A car on a horse railroad. [Eng.] [1913 Webster] {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. [1913 Webster]