truck

1 :  a wheeled vehicle for moving heavy articles: such asa :  a strong horse-drawn or automotive vehicle (such as a pickup) for haulingb :  an automotive vehicle with a short chassis equipped with a swivel for attaching a trailer and used especially for the highway hauling of freight; also :  a truck with attached trailerc :  a small barrow consisting of a rectangular frame having at one end a pair of handles and at the other end a pair of small heavy wheels and a projecting edge to slide under a load —called also hand truckd :  a small heavy rectangular frame supported on four wheels for moving heavy objectse :  a small flat-topped car pushed or pulled by handf :  a shelved stand mounted on casters

2a British :  an open railroad freight carb :  a swiveling carriage consisting of a frame with one or more pairs of wheels and springs to carry and guide one end (as of a railroad car) in turning sharp curves

3 :  a small wheel; specifically :  a small strong wheel for a gun carriage

4 :  a small wooden cap at the top of a flagstaff or masthead usually having holes for reeving flag or signal halyards