automatic automatic /ˌɔtoʊˈmætɪk/

adjective

1. () Operating with minimal human intervention; independent of external control  ( automatic )
   operating with minimal human intervention; independent of external control
    Automatic transmission
   automatic transmission
    A budget deficit that caused automatic spending cuts
   a budget deficit that caused automatic spending cuts
   
2. () Resembling the unthinking functioning of a machine  ( automatonlike , robotic , robotlike , automatic , machinelike )
   resembling the unthinking functioning of a machine
    An automatic thank you'
   an automatic thank you'
    Machinelike efficiency
   machinelike efficiency
   
3. () (physiology) without volition or conscious control  ( reflex , reflexive , automatic )
   (physiology) without volition or conscious control
    The automatic shrinking of the pupils of the eye in strong light
   the automatic shrinking of the pupils of the eye in strong light
    A reflex knee jerk
   a reflex knee jerk
    Sneezing is reflexive
   sneezing is reflexive
   

noun

1. A pistol that will keep firing until the ammunition is gone or the trigger is released  ( automatic , automatic pistol )
   a pistol that will keep firing until the ammunition is gone or the trigger is released
   
   
2. Light machine gun  ( automatic , automatic rifle , machine rifle )
   light machine gun