gear

American  

[geer] / gɪər /

noun

1. Machinery.

   1. a part, as a disk, wheel, or section of a shaft, having cut teeth of such form, size, and spacing that they mesh with teeth in another part to transmit or receive force and motion.

   2. an assembly of such parts.

   3. one of several possible arrangements of such parts in a mechanism, as an automobile transmission, for affording different relations of torque and speed between the driving and the driven machinery, or for permitting the driven machinery to run in either direction.

      first gear;

      reverse gear.

   4. a mechanism or group of parts performing one function or serving one purpose in a complex machine.

      steering gear.

2. implements, tools, or apparatus, especially as used for a particular occupation or activity; paraphernalia.

   fishing gear.

   Synonyms:

   rig, tackle, outfit, equipment

3. a harness, especially of horses.

4. Nautical.

   1. the lines, tackles, etc., of a particular sail or spar.

   2. the personal tools, clothing, and other possessions of a sailor.

5. portable items of personal property, including clothing; possessions.

   The campers keep all their gear in footlockers.

6. wearing apparel; clothing.

   The fashion pages of the Sunday paper are featuring the latest fall gear.

7. armor or arms.

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verb (used with object)

1. to provide with or connect by gearing.

2. to put in or into gear.

3. to provide with gear; supply; equip.

4. to prepare, adjust, or adapt to a particular situation, person, etc., in order to bring about satisfactory results.

   The producers geared their output to seasonal demands.

verb (used without object)

1. to fit exactly, as one part of gearing into another; come into or be in gear.

adjective

1. Slang. great; wonderful.

verb phrase

1. gear up

   1. to make or get ready for a future event or situation.

      Insiders say the senator is gearing up to run for governor.

   2. to get or put on equipment or clothing for a particular purpose.

      The hikers geared up for the long trek down the mountain.

   3. to arouse or excite, as with enthusiasm or expectation.

      The employees were geared up for a hard battle with management over working hours.

2. gear down

   1. Automotive. to shift the transmission of a vehicle to a lower gear.

      The truck driver geared down at the top of the hill.

   2. to reduce in scope or intensity.

      With less income you'll have to gear down your spending habits.

idioms

1. in / into high gear, in or into a state of utmost speed, activity, or efficiency: null ininto top gear

   With cold and flu season in high gear, it's time to perfect your chicken soup recipe.

   Military rearmament moved into high gear.

2. shift / switch gears, to change one's attitude, course of action, methods, etc., in an abrupt, dramatic, or unexpected manner.

   In the middle of the second act the play shifts gears from comedy to tragedy.

3. out of gear, in the state in which gears are not connected or meshed.

   The engine is out of gear.

4. in gear,

   1. Machinery. in the state in which gears are connected or meshed.

      The car is in gear.

   2. in proper or active working order; functioning continuously without trouble.

      Every department in this company must be in gear at all times.

gear British  

/ ɡɪə /

noun

1. a toothed wheel that engages with another toothed wheel or with a rack in order to change the speed or direction of transmitted motion

2. a mechanism for transmitting motion by gears, esp for a specific purpose

   the steering gear of a boat

3. the engagement or specific ratio of a system of gears

   in gear

   high gear

4. personal equipment and accoutrements; belongings

5. equipment and supplies for a particular operation, sport, etc

   fishing gear

6. nautical all equipment or appurtenances belonging to a certain vessel, sailor, etc

7. short for landing gear

8. informal up-to-date clothes and accessories, esp those bought by young people

9. slang

   1. stolen goods

   2. illegal drugs

10. a less common word for harness

11. working or performing effectively or properly

12. out of order; not functioning properly

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verb

1. (tr) to adjust or adapt (one thing) so as to fit in or work with another

   to gear our output to current demand

2. (tr) to equip with or connect by gears

3. (intr) to be in or come into gear

4. (tr) to equip with harness

gear Scientific  

/ gîr /

1. A wheel with teeth around its rim that mesh with the teeth of another wheel to transmit motion. Gears are used to transmit power (as in a car transmission) or change the direction of motion in a mechanism (as in a differential axle). Fixed ratios of speed in various parts of a machine is often established by the arrangement of gears.

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gear More Idioms  

1. see high gear; slip a cog (gear).

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Other Word Forms

• gearless
  adjective
• regear
  verb
• ungeared
  adjective
• well-geared
  adjective

Etymology

Origin of gear

First recorded in 1150–1200; Middle English gere, from Old Norse gervi, gørvi; akin to Old English gearwe “equipment”

Explanation

The noun gear refers to several things. First, it’s the equipment we need for a sport or event. A gear is also a wheel with teeth that interlocks with another gear to transmit motion in a machine. The background of gear as "equipment" dates back to around 1200 and comes from the Old Norse gervi, "apparel." The word gear in machinery became common in the early 19th century, although there is evidence that the word came to mean "toothed wheel" as early as 1520. Gear entered English slang around 1951, meaning something stylish. This use was popularized in the 1960s, under the influence of British pop music.

Example Sentences

Too bad LA Gear isn’t still publicly traded.

From Barron's • Apr. 16, 2026

Gear Isle has not received reports of adverse reactions from these products, according to the FDA announcement.

From Los Angeles Times • Mar. 30, 2026

Johnson’s impression is getting slurrier and even more meta, but continues to deliver on random pop culture references, which this week included the Indigo Girls, “The Hunger Games” and the videogame “Metal Gear Solid.”

From Los Angeles Times • Dec. 21, 2025

He hopes to improve Vail’s rental program, My Epic Gear, including tailored recommendations based on past preferences.

From The Wall Street Journal • Oct. 31, 2025

Gear waits for us on picnic tables—helmets, harnesses, and ropes.

From "Paradise on Fire" by Jewell Parker Rhodes

Related Words

• accessory
• apparatus
• harness
• instrument
• kit
• luggage
• machinery
• material
• paraphernalia
• stuff
• supply