Chassis rust repair. the frame, wheels, and machinery of a motor vehicle, on which the body is supported. 1. An example of a chassis is a vehicle frame, the underpart of a motor vehicle, on which the body is mounted; if the running gear such as wheels and transmission, and sometimes even the driver's seat, are included, then the assembly is described as a rolling chassis. Generally large four-wheel drives are built on a separate chassis, much like a truck. CHASSIS meaning: 1. A chassis is the framework that a vehicle is built on. 4. The meaning of CHASSIS is the supporting frame of a structure (such as an automobile or television); also : the frame and working parts (as of an automobile or electronic device) exclusive of the body or housing. the framework on which a gun carriage moves backward and forward. a frame for mounting the circuit components of a radio or television set. brnucy yniy vhn eyzd ddft aybj rcgp mhhi moqptb ieog