n. The the supporting structural framework of a vehicle.
n. the landing gear of an aircraft
n. the male genitalia
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. framework that serves as a support for the body of a vehicle
Word Usage
"Toby just showed up at the door ... he must have been kept in a garage or a basement for the last week his entire undercarriage is gray and dirty, but he wasn't starving."