overdriven

overdrive

[v. oh-ver-drahyv; n. oh-ver-drahyv]
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:
before 950; Middle English overdriven to cover over, overpower; Old English oferdrīfan to drive away, overthrow. See over-, drive

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
overdrive
 
n
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
 
vb , -drives, -driving, -drove, -driven
4.  (tr) to drive too hard or too far; overwork or overuse

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

overdrive
"speed-increasing gear in an automobile," 1929, from over + drive.
Online Etymology Dictionary, © 2010 Douglas Harper
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