driver \driv"er\, n. from drive.
   1. one who, or that which, drives; the person or thing that
      urges or compels anything else to move onward.
      1913 webster

   2. the person who drives beasts or a carriage; a coachman; a
      charioteer, etc.; hence, also, one who controls the
      movements of a any vehicle.
      1913 webster +pjc

   3. an overseer of a gang of slaves or gang of convicts at
      their work.
      1913 webster

   4. mach. a part that transmits motion to another part by
      contact with it, or through an intermediate relatively
      movable part, as a gear which drives another, or a lever
      which moves another through a link, etc. specifically:
      a the driving wheel of a locomotive.
      b an attachment to a lathe, spindle, or face plate to
          turn a carrier.
      c a crossbar on a grinding mill spindle to drive the
          upper stone.
          1913 webster

   5. naut. the after sail in a ship or bark, being a
      fore-and-aft sail attached to a gaff; a spanker. --totten.
      1913 webster

   6. an implement used for driving; as:
      a a mallet.
      b a tamping iron.
      c a cooper's hammer for driving on barrel hoops.
      d a wooden-headed golf club with a long shaft, for
          playing the longest strokes.
          webster 1913 suppl.

   driver ant zool., a species of african stinging ant; one
      of the visiting ants anomma arcens; -- so called
      because they move about in vast armies, and drive away or
      devour all insects and other small animals.
      1913 webster
see also:
drive driver ant anomma arcens 

driver ant
     n : tropical nomadic ant that preys mainly on other insects
         syn: army ant, legionary ant
see also:
army ant legionary ant