chassis

noun

chas·​sis ˈcha-sē How to pronounce chassis (audio) ˈsha-sē How to pronounce chassis (audio)
also ˈcha-səs
plural chassis ˈcha-sēz How to pronounce chassis (audio)
ˈsha-sēz
Synonyms of chassisnext
: the supporting frame of a structure (such as an automobile or television)
Leaf springs are attached to the car's chassis.
also : the frame and working parts (as of an automobile or electronic device) exclusive of the body or housing

Examples of chassis in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This paper-thin profile allows them to be integrated directly onto heat sinks, chassis walls, or internal components, enabling ultra-thin laptop designs that were previously impossible to cool. Prabhat Ranjan Mishra, Interesting Engineering, 3 Jan. 2026 The chassis, engine, and aesthetic perfection of the 964 represented a high watermark in the 911 lineage. Robert Ross, Robb Report, 2 Jan. 2026 An employee works on the production line of power batteries and box chassis for new energy vehicles at a workshop on July 11, 2025 in Huaibei, Anhui Province of China. Lim Hui Jie, CNBC, 31 Dec. 2025 Beautifully simple in execution, the camper truck is a nimble, go-anywhere Jeep that carries its own squaredrop accommodations on its chassis. New Atlas, 30 Dec. 2025 See All Example Sentences for chassis

Word History

Etymology

borrowed from French châssis "window sash, cold frame, frame holding cloth to be painted or embroidered, supporting frame of a motor vehicle," going back to Old French chasiz "window frame" from casse (Anglo-Norman & Norman dialect) "reliquary" (Middle French chasse "frame, mount") + -iz, denominal collective suffix, often of things linked or intertwined, of uncertain origin — more at case entry 2

Note: To judge by the derivative chasiz, attested already in the twelfth century (Roman d'Énéas), the meaning "frame" of casse/chasse is older than its first Middle French attestation in the fourteenth century. Presumably the Latin source capsa had developed more than one sense, all subsumable under the meaning "something holding or enclosing" in Gallo-Romance.

First Known Use

circa 1864, in the meaning defined above

Time Traveler
The first known use of chassis was circa 1864

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Cite this Entry

“Chassis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chassis. Accessed 5 Jan. 2026.

Kids Definition

chassis

noun
chas·​sis ˈshas-ē How to pronounce chassis (audio) ˈchas-ē How to pronounce chassis (audio)
plural chassis -ēz How to pronounce chassis (audio)
: a supporting frame (as that of the body of an automobile or airplane or the parts of a radio or television receiver)

More from Merriam-Webster on chassis

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