a transmission, as in an automobile.
a shield or housing for gears.
Also, gear box.

1885–90; gear + box1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To gearbox
World English Dictionary
gearbox (ˈɡɪəˌbɒks)
1.  the metal casing within which a train of gears is sealed
2.  this metal casing and its contents, esp in a motor vehicle

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Example sentences
They have more oomph, and no need of a gearbox to deliver it.
Unlike a conventional turbofan, it uses a gearbox rather than a shaft between
  the fan and the turbine.
Build in a special gearbox which combines the output of the motor with that of
  an internal-combustion engine.
For, once the engine block and the gearbox are gone, the game of car design
Image for gearbox
Copyright © 2014, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature