# gearbox

Pronunciation: say "GEER-boks" US /ˈɡɪɹˌbɑks/, UK /ˈɡɪəbɒks/

## Noun

1. The part of a car's transmission that holds the train of gears and connects to the gearshift.
   - Simple: The part of a car that holds the gears and is controlled by the gearshift.
   - _The mechanic replaced the worn gearbox in my old hatchback before the road trip._
   - _A grinding noise from the gearbox warned her that the synchronizers were failing._
2. A train of meshing gears enclosed within a single protective housing.
   - Simple: A closed box that holds a set of connected gears turning together.
   - _Wind turbines use a gearbox to raise the rotor's slow rotation to the speed the generator needs._
   - _Industrial gearboxes are sealed to keep out dust and hold in their lubricant._

## Origin

Formed from the words "gear" and "box".

Source: DictionaryAI, https://dictionaryai.com/define/gearbox (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).