\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.