overdrive


From The Collaborative International Dictionary of English v.0.48:

Overdrive \O`ver*drive"\, v. t. & i.
   To drive too hard, or far, or beyond strength.
   [1913 Webster]
.

From The Collaborative International Dictionary of English v.0.48:

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 overdrive[1] is operative; as, cruising at 80 mph in
      overdrive.
      [PJC]

   3. Hence: [fig.] A state of unusually intense activity; as,
      when they got their new supercomputer, their research
      kicked into overdrive; one look at her made his heart jump
      into overdrive; -- used mostly of the activities of
      persons or groups.
      [PJC]
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