n.1. Any of various heavy motor vehicles designed for carrying or pulling loads.
2. A hand truck.
3. a. A wheeled platform, sometimes equipped with a motor, for conveying loads in a warehouse or freight yard.
b. A set of bookshelves mounted on four wheels or casters, used in libraries.
4. a. One of the swiveling frames of wheels under each end of a railroad car or trolley car.
b. Either of the frames housing a pair of wheels on a skateboard or landboard.
5. Nautical A small piece of wood placed at the top of a mast or flagpole, usually having holes through which halyards can be passed.
6. Chiefly British A railroad freight car without a top.