The definition of a chassis is the structural framework or base framework of a car, computer, radio, or piece of audio equipment.(noun)
The metal frame that a car is built around is an example of the chassis.
See chassis in Webster's New World College Dictionary
noun pl. chassis
Origin: Fr châssis: see chase
See chassis in American Heritage Dictionary 4
noun pl. chas·sis (-ēz)
Origin: French châssis, frame
Origin: , from Old French
Origin: , from Vulgar Latin *capsīcium
Origin: , from Latin capsa, box.
Learn more about chassis