automatic

• n.
  • light machine gun

    同义词： automatic rifle machine rifle

  • a pistol that will keep firing until the ammunition is gone or the trigger is released

    同义词： automatic pistol

• adj.
  • operating with minimal human intervention; independent of external control

    "automatic transmission"; "a budget deficit that caused automatic spending cuts"

  • like the unthinking functioning of a machine

    "an automatic `thank you'"

    同义词： automatonlike machinelike robotlike

  • without volition or conscious control

    "the automatic shrinking of the pupils of the eye in strong light"

    同义词： reflex(a) reflexive

以上来源于: WordNet