chas·sis (ch?s??)n. pl. chas·sis (-?z) 1. The rectangular, usually steel frame, supported on springs and attached to the axles, that holds the body and motor of an automotive vehicle.2. The landing gear of an aircraft, including the wheels, skids, floats, and other structures that support the aircraft on land or water.3. The frame on which a gun carriage moves forward and backward.4. The framework to which the components of a radio, television, or other electronic devices are attached.[French châssis, frame, from Old French, from Vulgar Latin *caps?cium, from Latin capsa, box.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.chassis (??æs?) n, pl -sis (-s?z) 1. (Automotive Engineering) the steel frame, wheels, engine, and mechanical parts of a motor vehicle, to which the body is attached2. (Electronics) electronics a mounting for the circuit components of an electrical or electronic device, such as a radio or television3. (Aeronautics) the landing gear of an aircraft4. (Building) obsolete a wooden framework for a window, screen, etc5. (Firearms, Gunnery, Ordnance & Artillery) the frame on which a cannon carriage moves backwards and forwards6. slang the body of a person, esp a woman[C17 (meaning: window frame): from French châssis frame, from Vulgar Latin capsicum (unattested), ultimately from Latin capsa case2]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014chas?sis (?t?æs i, -?s, ??æs i) n., pl. chas?sis (?t?æs iz, ??æs-) 1. the frame, wheels, and machinery of a motor vehicle, on which the body is supported. 2. the framework on which a gun carriage moves backward and forward. 3. the main landing gear of an aircraft. 4. a frame for mounting the circuit components of a radio or television set. [1655?65;