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[geer-boks] /ˈgɪərˌbɒks/
a transmission, as in an automobile.
a shield or housing for gears.
Origin of gearbox
1885-90; gear + box1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for gearbox
  • 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 changes.
  • Electric motors do not need a gearbox, which reduces weight and mechanical complexity.
  • In conventional wind turbines, the blades spin a shaft that is connected through a gearbox to the generator.
  • New design does away with the need for a complex gearbox.
  • The eight-speed gearbox is always in the right gear, though shifts were a bit slow using the steering-wheel-mounted buttons.
  • It has a four cylinder inline engine with a four-speed gearbox.
  • The mechanical reliability of gearbox components has recently been singled out as an area of growing concern.
British Dictionary definitions for gearbox


the metal casing within which a train of gears is sealed
this metal casing and its contents, esp in a motor vehicle
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Slang definitions & phrases for gearbox



A stupid person; idiot; dimwit: only gearboxes greet strangers (1970s+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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