(Northern England) A low, hand-operated truck, generally with four wheels, used for transporting objects or for riding on as a toy; a trolley.

(by extension, rail transport, also attributively) One of two sets of wheels under a locomotive or railcar; also, a structure with axles and wheels under a locomotive, railcar, or semi which provides support and reduces vibration for the vehicle.

(aviation, by extension) A set of wheels attached to one of an aircraft's landing gear, or the structure connecting the wheels in one such set.

(Britain, dated, India, rail transport) A railway carriage.

(chiefly US, slang) A marijuana cigarette; a joint.

A term that can refer to a ghost or supernatural creature, a standard of performance in competition, an unidentified aircraft, a score in golf, or a piece of dried mucus in the nostril.