Definition of autopilot noun from the Oxford Advanced American Dictionary

 

autopilot

 noun
noun
 
(also automatic pilot)
 
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  • a device in an aircraft or a ship that keeps it on a fixed course without the need for a person to control it
  • Idioms
    (be) on autopilot
     
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    to do something without thinking because you have done the same thing many times before I got up and got dressed on autopilot.
    See the Oxford Advanced Learner's Dictionary entry: autopilot