Source : Webster's Revised Unabridged Dictionary (1913)

Auger \Au"ger\, n. [OE. augoure, nauger, AS. nafeg[=a]r, fr.
   nafu, nafa, nave of a wheel + g[=a]r spear, and therefore
   meaning properly and originally a nave-bore. See {Nave} (of a
   wheel) and 2d {Gore}, n.]
   1. A carpenter's tool for boring holes larger than those
      bored by a gimlet. It has a handle placed crosswise by
      which it is turned with both hands. A pod auger is one
      with a straight channel or groove, like the half of a bean
      pod. A screw auger has a twisted blade, by the spiral
      groove of which the chips are discharge.

   2. An instrument for boring or perforating soils or rocks,
      for determining the quality of soils, or the nature of the
      rocks or strata upon which they lie, and for obtaining
      water.

   {Auger bit}, a bit with a cutting edge or blade like that of
      an anger.

Source : WordNet®

auger
     n 1: a long flexible steel coil for dislodging stoppages in
          curved pipes [syn: {plumber's snake}]
     2: hand tool for boring holes [syn: {gimlet}, {screw auger}, {wimble}]