Meaning of overdrive

o•ver•drive

Pronunciation: (v.ō"vur-drīv'n.ō'vur-drīv"), [key]
— v., n. -drove, -driv•en, -driv•ing,
—v.t.
  1. to push or carry to excess; overwork.
  2. to drive too hard.
—n.
  1. a device containing a gear set at such ratio and arrangement as to provide a drive shaft speed greater than the engine crankshaft speed.
  2. an intense state of activity or productivity: The political campaign has shifted into overdrive.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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