autopilot

[aw-toh-pahy-luht]

Origin:
auto-3 + pilot

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
autopilot (ˌɔːtəˈpaɪlət, -təʊ-)
 
n
short for automatic pilot

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

autopilot
1935, from auto- + pilot (q.v.).
Online Etymology Dictionary, © 2010 Douglas Harper
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Encyclopedia Britannica
Encyclopedia

autopilot

device for controlling an aircraft or other vehicle without constant human intervention.

Learn more about autopilot with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
So then you basically put the panels on autopilot, and they know where the sun
  is on their own.
All he had to do was direct the autopilot to return to base.
It's equipped with an autopilot device that's programmed to seek out and fly in
  thermals.
No matter how good the autopilot, you still better know how to land the plane.
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