Gear n. : Clothing; garments; ornaments.

Gear n. : Goods; property; household stuff.

Gear n. : Whatever is prepared for use or wear; manufactured stuff or material.

Gear n. : The harness of horses or cattle; trapping.

Gear n. : Warlike accouterments.

Gear n. : Manner; custom; behavior.

Gear n. : Business matters; affairs; concern.

Gear n. : A toothed wheel, or cogwheel; as, a spur gear, or a bevel gear; also, toothed wheels, collectively.

Gear n. : An apparatus for performing a special function; gearing; as, the feed gear of a lathe.

Gear n. : Engagement of parts with each other; as, in gear; out of gear.

Gear n. : See 1st Jeer (b).

Gear n. : Anything worthless; stuff; nonsense; rubbish.

Gear v. t. : To dress; to put gear on; to harness.

Gear v. t. : To provide with gearing.

Gear v. i. : To be in, or come into, gear.

Example:
What is short Gear ratio n how to eliminate Gears in your car?

Taxonomy
gear, teeth, pitch, helical gears, ratio, worm, ANSI, AGMA, G05, gear teeth, spur gears, circular pitch, involute, thickness, velocity ratio, axis, shaft, diameter.

Defination from the web:
Gears. For other uses, see Gear (disambiguation). For the gear-like device used to drive a roller chain, see sprocket. ... The gear's most important feature is that gears of unequal sizes (diameters) can be combined to produce a mechanical advantage, so that the ...