overdrive gear

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• Overdrive (mechanics) — For other uses, see Overdrive. An overdrive is sometimes a separate unit that fits into the back of a gearbox, as with this Fairey unit. A plate warns to only engage the unit in third and fourth gears …   Wikipedia

• overdrive — o ver*drive , n. 1. (Machinery) A gearing device which causes the drive shaft of an automobile or other machine to rotate at a speed greater than that of the engine crankshaft. [PJC] 2. (Automotive) The gear setting of a motor vehicle at which… …   The Collaborative International Dictionary of English

• overdrive — ► NOUN 1) a gear in a motor vehicle providing a gear ratio higher than that of the usual top gear. 2) a state of high or excessive activity. ► VERB ▪ drive or work to exhaustion. DERIVATIVES overdriven adjective …   English terms dictionary

• overdrive — (n.) speed increasing gear in an automobile, 1929, from OVER (Cf. over) + DRIVE (Cf. drive) (n.) …   Etymology dictionary

• overdrive — [ō′vər drīv΄] n. 1. a gear that at a certain speed automatically reduces an engine s power output without reducing its driving speed: used to lessen fuel consumption and engine wear 2. Informal a state of intensified activity, productivity, etc …   English World dictionary

• Gear ratio — The gear ratio is the relationship between the number of teeth on two gears that are meshed or two sprockets connected with a common roller chain, or the circumferences of two pulleys connected with a drive belt. General description In the… …   Wikipedia

• Gear stick — A gear stick (also known as gearstick, gear lever, selection lever, shift stick and gear shifter) is the lever used to change gear in a vehicle, such as an automobile, with manual transmission or several common forms of automatic transmission.… …   Wikipedia

• overdrive — [[t]o͟ʊvə(r)draɪv[/t]] overdrives 1) N COUNT: usu sing, oft N n The overdrive in a vehicle is a very high gear that is used when you are driving at high speeds. The overdrive switch was on the steering column. 2) PHRASE: PHR after v If you go… …   English dictionary

• overdrive — o|ver|drive [ˈəuvədraıv US ˈouvər ] n [U] 1.) an additional ↑gear which allows a car to go fast while its engine produces the least power necessary 2.) go into overdrive/be in overdrive to start being very active or working very hard ▪ Her career …   Dictionary of contemporary English

• overdrive — noun (U) 1 an additional gear 1 (2) which allows a car to go fast while its engine produces the least power necessary: Put the car in overdrive when you hit 50 mph. 2 go into overdrive to become very excited or active: You could see his… …   Longman dictionary of contemporary English

• gear — I (New American Roget s College Thesaurus) n. clothing, dress; cogwheel; equipment, tools, apparatus; harness, etc. See instrumentality, provision. II (Roget s IV) n. 1. [Equipment] Syn. material, tackle, apparatus, paraphernalia; see equipment …   English dictionary for students