A railway freight car with no sides; a flatcar.
A document scanner with a flat bed.
An open freight vehicle with no sides, designed to carry heavy or outsized loads.
Having a flat bed.
To transport by flatbed.
A chassis or framework-like structure underneath a railroad car to which wheel axles (and, hence, wheels) are attached through bearings. (Not to be confused with railway truck or railtruck, which are British English synonyms of railroad car)