How do you spell Tram

Available Definitions:
1)  n. - A four-wheeled truck running on rails, and used in a mine, as for carrying coal or ore.
2)  n. - The shaft of a cart.
3)  n. - One of the rails of a tramway.
4)  n. - A car on a horse railroad.
5)  n. - A silk thread formed of two or more threads twisted together, used especially for the weft, or cross threads, of the best quality of velvets and silk goods.