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overdrive

[v. oh-ver-drahyv; n. oh-ver-drahyv] /v. ˌoʊ vərˈdraɪv; n. ˈoʊ vərˌdraɪv/
verb (used with object), overdrove, overdriven, overdriving.
1.
to push or carry to excess; overwork.
2.
to drive too hard.
noun
3.
Machinery, Automotive. a device containing a gear set at such ratio and arrangement as to provide a drive shaft speed greater than the engine crankshaft speed.
4.
Informal. an intense state of activity or productivity:
The political campaign has shifted into overdrive.
Origin
950
before 950; Middle English overdriven to cover over, overpower; Old English oferdrīfan to drive away, overthrow. See over-, drive
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for over drove

overdrive

noun (ˈəʊvəˌdraɪv)
1.
a very high gear in a motor vehicle used at high speeds to reduce wear and save fuel
2.
in overdrive, in a state of intense activity
3.
into overdrive, into a state of intense activity
verb (ˌəʊvəˈdraɪv) -drives, -driving, -drove, -driven
4.
(transitive) to drive too hard or too far; overwork or overuse
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for over drove

overdrive

n.

"speed-increasing gear in an automobile," 1929, from over- + drive (n.).

Online Etymology Dictionary, © 2010 Douglas Harper
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