overdrive

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overdrive

a very high gear in a motor vehicle used at high speeds to reduce wear and save fuel
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

overdrive

[′ō·vər‚drīv]
(mechanical engineering)
An automobile engine device that lowers the gear ratio, thereby reducing fuel consumption.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Overdrive

(processor)
An Intel Pentium processor which fits into a socket designed to accomodate an Intel 486, or into a special upgrade socket on the motherboard.
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