Meaning of chassis

chas•sis

1. the frame, wheels, and machinery of a motor vehicle, on which the body is supported.
2. the frame or railway on which a gun carriage moves backward and forward.
3. the main landing gear of an aircraft; that portion of the landing gear that supports an aircraft.
4. a frame for mounting the circuit components of a radio or television set.
5. a construction forming the sides, top, and bottom of a cabinet, showcase, or the like.