A wheeled vehicle for carrying heavy weights; variously applied. An open railway wagon.

A low truck without sides or ends, esp. one with flanged wheels for running on a railway, or a track of rails in a factory, etc. Cf. bogie, n. 1.

‘a railroad-car consisting of a platform without sides or top; a platform-car’ (Cent. Dict.).

In extended use: a system whereby one thing is carried on top of or by another; an example of this; an object carried in this way. Cf. sense C. 2.